Dr Jan Hamann

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I am a theoretical physicist. More specifically, my expertise is in the field of cosmology, and most of my research revolves around using a variety of high-precision astrophysical observations to look for clues that help us better understand the history, composition and origin of our Universe.

Location

Old Main Building G61E

Journal articles | 2024

Deshpande M; Hamann J; Sengupta D; White M; Williams AG; Wong YYY, 2024, 'Revisiting cosmological constraints on supersymmetric SuperWIMPs', European Physical Journal C, 84, http://dx.doi.org/10.1140/epjc/s10052-024-12992-3

Journal articles | 2024

Hamann J; Kang Y, 2024, 'A Minkowski functional analysis of the Cosmic Microwave Background weak lensing convergence', Journal of Cosmology and Astroparticle Physics, 2024, http://dx.doi.org/10.1088/1475-7516/2024/05/076

Journal articles | 2023

Wons J; Dimastrogiovanni E; Fasiello M; Hamann J; Johnson MC, 2023, 'Enhancing bispectrum estimators for galaxy redshift surveys with velocities', Physical Review D, 108, http://dx.doi.org/10.1103/PhysRevD.108.L021305

Journal articles | 2022

Hamann J; Malhotra A, 2022, 'Constraining primordial tensor features with the anisotropies of the cosmic microwave background', Journal of Cosmology and Astroparticle Physics, 2022, http://dx.doi.org/10.1088/1475-7516/2022/12/015

Journal articles | 2022

Hamann J; Wons J, 2022, 'Optimising inflationary features the Bayesian way', Journal of Cosmology and Astroparticle Physics, 2022, http://dx.doi.org/10.1088/1475-7516/2022/03/036

Journal articles | 2021

Aghanim N; Akrami Y; Ashdown M; Aumont J; Baccigalupi C; Ballardini M; Banday AJ; Barreiro RB; Bartolo N; Basak S; Battye R; Benabed K; Bernard JP; Bersanelli M; Bielewicz P; Bock JJ; Bond JR; Borrill J; Bouchet FR; Boulanger F; Bucher M; Burigana C; Butler RC; Calabrese E; Cardoso JF; Carron J; Challinor A; Chiang HC; Chluba J; Colombo LPL; Combet C; Contreras D; Crill BP; Cuttaia F; De Bernardis P; De Zotti G; Delabrouille J; Delouis JM; DI Valentino E; DIego JM; Doré O; Douspis M; Ducout A; Dupac X; Dusini S; Efstathiou G; Elsner F; Enßlin TA; Eriksen HK; Fantaye Y; Farhang M; Fergusson J; Fernandez-Cobos R; Finelli F; Forastieri F; Frailis M; Fraisse AA; Franceschi E; Frolov A; Galeotta S; Galli S; Ganga K; Génova-Santos RT; Gerbino M; Ghosh T; González-Nuevo J; Górski KM; Gratton S; Gruppuso A; Gudmundsson JE; Hamann J; Handley W; Hansen FK; Herranz D; Hildebrandt SR; Hivon E; Huang Z; Jaffe AH; Jones WC; Karakci A; Keihänen E; Keskitalo R; Kiiveri K; Kim J; Kisner TS; Knox L; Krachmalnicoff N; Kunz M; Kurki-Suonio H; Lagache G; Lamarre JM; Lasenby A; Lattanzi M; Lawrence CR; Le Jeune M; Lemos P; Lesgourgues J; Levrier F; Lewis A; Liguori M, 2021, 'Erratum: Planck 2018 results: VI. Cosmological parameters (Astronomy and Astrophysics (2020) 641 (A6) DOI: 10.1051/0004-6361/201833910)', Astronomy and Astrophysics, 652, http://dx.doi.org/10.1051/0004-6361/201833910e

Journal articles | 2021

Hamann J; Le Gia QT; Sloan IH; Wang YG; Womersley RS, 2021, 'A new probe of Gaussianity and isotropy with application to cosmic microwave background maps', International Journal of Modern Physics C, 32, http://dx.doi.org/10.1142/S0129183121500844

Journal articles | 2020

Aghanim N; Akrami Y; Arroja F; Ashdown M; Aumont J; Baccigalupi C; Ballardini M; Banday AJ; Barreiro RB; Bartolo N; Basak S; Battye R; Benabed K; Bernard JP; Bersanelli M; Bielewicz P; Bock JJ; Bond JR; Borrill J; Bouchet FR; Boulanger F; Bucher M; Burigana C; Butler RC; Calabrese E; Cardoso JF; Carron J; Casaponsa B; Challinor A; Chiang HC; Colombo LPL; Combet C; Contreras D; Crill BP; Cuttaia F; De Bernardis P; De Zotti G; Delabrouille J; Delouis JM; Désert FX; Di Valentino E; Dickinson C; Diego JM; Donzelli S; Doré O; Douspis M; Ducout A; Dupac X; Efstathiou G; Elsner F; Enßlin TA; Eriksen HK; Falgarone E; Fantaye Y; Fergusson J; Fernandez-Cobos R; Finelli F; Forastieri F; Frailis M; Franceschi E; Frolov A; Galeotta S; Galli S; Ganga K; Génova-Santos RT; Gerbino M; Ghosh T; González-Nuevo J; Górski KM; Gratton S; Gruppuso A; Gudmundsson JE; Hamann J; Handley W; Hansen FK; Helou G; Herranz D; Hildebrandt SR; Hivon E; Huang Z; Jaffe AH; Jones WC; Karakci A; Keihänen E; Keskitalo R; Kiiveri K; Kim J; Kisner TS; Knox L; Krachmalnicoff N; Kunz M; Kurki-Suonio H; Lagache G; Lamarre JM; Langer M; Lasenby A; Lattanzi M; Lawrence CR; Le Jeune M; Leahy JP, 2020, 'Planck 2018 results: I. Overview and the cosmological legacy of Planck', Astronomy and Astrophysics, 641, http://dx.doi.org/10.1051/0004-6361/201833880

Journal articles | 2020

Aghanim N; Akrami Y; Ashdown M; Aumont J; Baccigalupi C; Ballardini M; Banday AJ; Barreiro RB; Bartolo N; Basak S; Battye R; Benabed K; Bernard JP; Bersanelli M; Bielewicz P; Bock JJ; Bond JR; Borrill J; Bouchet FR; Boulanger F; Bucher M; Burigana C; Butler RC; Calabrese E; Cardoso JF; Carron J; Challinor A; Chiang HC; Chluba J; Colombo LPL; Combet C; Contreras D; Crill BP; Cuttaia F; De Bernardis P; De Zotti G; Delabrouille J; Delouis JM; Di Valentino E; Diego JM; Doré O; Douspis M; Ducout A; Dupac X; Dusini S; Efstathiou G; Elsner F; Enßlin TA; Eriksen HK; Fantaye Y; Farhang M; Fergusson J; Fernandez-Cobos R; Finelli F; Forastieri F; Frailis M; Fraisse AA; Franceschi E; Frolov A; Galeotta S; Galli S; Ganga K; Génova-Santos RT; Gerbino M; Ghosh T; González-Nuevo J; Górski KM; Gratton S; Gruppuso A; Gudmundsson JE; Hamann J; Handley W; Hansen FK; Herranz D; Hildebrandt SR; Hivon E; Huang Z; Jaffe AH; Jones WC; Karakci A; Keihänen E; Keskitalo R; Kiiveri K; Kim J; Kisner TS; Knox L; Krachmalnicoff N; Kunz M; Kurki-Suonio H; Lagache G; Lamarre JM; Lasenby A; Lattanzi M; Lawrence CR; Le Jeune M; Lemos P; Lesgourgues J; Levrier F; Lewis A; Liguori M, 2020, 'Planck 2018 results: VI. Cosmological parameters', Astronomy and Astrophysics, 641, http://dx.doi.org/10.1051/0004-6361/201833910

Journal articles | 2020

Aghanim N; Akrami Y; Ashdown M; Aumont J; Baccigalupi C; Ballardini M; Banday AJ; Barreiro RB; Bartolo N; Basak S; Benabed K; Bernard JP; Bersanelli M; Bielewicz P; Bock JJ; Bond JR; Borrill J; Bouchet FR; Boulanger F; Bucher M; Burigana C; Butler RC; Calabrese E; Cardoso JF; Carron J; Casaponsa B; Challinor A; Chiang HC; Colombo LPL; Combet C; Crill BP; Cuttaia F; De Bernardis P; De Rosa A; De Zotti G; Delabrouille J; Delouis JM; Di Valentino E; Diego JM; Doré O; Douspis M; Ducout A; Dupac X; Dusini S; Efstathiou G; Elsner F; Enßlin TA; Eriksen HK; Fantaye Y; Fernandez-Cobos R; Finelli F; Frailis M; Fraisse AA; Franceschi E; Frolov A; Galeotta S; Galli S; Ganga K; Génova-Santos RT; Gerbino M; Ghosh T; Giraud-Héraud Y; González-Nuevo J; Górski KM; Gratton S; Gruppuso A; Gudmundsson JE; Hamann J; Handley W; Hansen FK; Herranz D; Hivon E; Huang Z; Jaffe AH; Jones WC; Keihänen E; Keskitalo R; Kiiveri K; Kim J; Kisner TS; Krachmalnicoff N; Kunz M; Kurki-Suonio H; Lagache G; Lamarre JM; Lasenby A; Lattanzi M; Lawrence CR; Le Jeune M; Levrier F; Lewis A; Liguori M; Lilje PB; Lilley M; Lindholm V; López-Caniego M; Lubin PM; Ma YZ; Maciás-Pérez JF; Maggio G, 2020, 'Planck 2018 results: V. CMB power spectra and likelihoods', Astronomy and Astrophysics, 641, http://dx.doi.org/10.1051/0004-6361/201936386

Journal articles | 2020

Aghanim N; Akrami Y; Ashdown M; Aumont J; Baccigalupi C; Ballardini M; Banday AJ; Barreiro RB; Bartolo N; Basak S; Benabed K; Bernard JP; Bersanelli M; Bielewicz P; Bock JJ; Bond JR; Borrill J; Bouchet FR; Boulanger F; Bucher M; Burigana C; Calabrese E; Cardoso JF; Carron J; Challinor A; Chiang HC; Colombo LPL; Combet C; Crill BP; Cuttaia F; De Bernardis P; De Zotti G; Delabrouille J; Di Valentino E; Diego JM; Doré O; Douspis M; Ducout A; Dupac X; Efstathiou G; Elsner F; Enßlin TA; Eriksen HK; Fantaye Y; Fernandez-Cobos R; Finelli F; Forastieri F; Frailis M; Fraisse AA; Franceschi E; Frolov A; Galeotta S; Galli S; Ganga K; Génova-Santos RT; Gerbino M; Ghosh T; González-Nuevo J; Górski KM; Gratton S; Gruppuso A; Gudmundsson JE; Hamann J; Handley W; Hansen FK; Herranz D; Hivon E; Huang Z; Jaffe AH; Jones WC; Karakci A; Keihänen E; Keskitalo R; Kiiveri K; Kim J; Knox L; Krachmalnicoff N; Kunz M; Kurki-Suonio H; Lagache G; Lamarre JM; Lasenby A; Lattanzi M; Lawrence CR; Le Jeune M; Levrier F; Lewis A; Liguori M; Lilje PB; Lindholm V; López-Caniego M; Lubin PM; Ma YZ; Maciás-Pérez JF; Maggio G; Maino D; Mandolesi N; Mangilli A; Marcos-Caballero A; Maris M, 2020, 'Planck 2018 results: VIII. Gravitational lensing', Astronomy and Astrophysics, 641, http://dx.doi.org/10.1051/0004-6361/201833886

Journal articles | 2020

Akrami Y; Arroja F; Ashdown M; Aumont J; Baccigalupi C; Ballardini M; Banday AJ; Barreiro RB; Bartolo N; Basak S; Benabed K; Bernard JP; Bersanelli M; Bielewicz P; Bock JJ; Bond JR; Borrill J; Bouchet FR; Boulanger F; Bucher M; Burigana C; Butler RC; Calabrese E; Cardoso JF; Carron J; Challinor A; Chiang HC; Colombo LPL; Combet C; Contreras D; Crill BP; Cuttaia F; De Bernardis P; De Zotti G; Delabrouille J; Delouis JM; Di Valentino E; Diego JM; Donzelli S; Doré O; Douspis M; Ducout A; Dupac X; Dusini S; Efstathiou G; Elsner F; Enßlin TA; Eriksen HK; Fantaye Y; Fergusson J; Fernandez-Cobos R; Finelli F; Forastieri F; Frailis M; Franceschi E; Frolov A; Galeotta S; Galli S; Ganga K; Gauthier C; Génova-Santos RT; Gerbino M; Ghosh T; González-Nuevo J; Górski KM; Gratton S; Gruppuso A; Gudmundsson JE; Hamann J; Handley W; Hansen FK; Herranz D; Hivon E; Hooper DC; Huang Z; Jaffe AH; Jones WC; Keihänen E; Keskitalo R; Kiiveri K; Kim J; Kisner TS; Krachmalnicoff N; Kunz M; Kurki-Suonio H; Lagache G; Lamarre JM; Lasenby A; Lattanzi M; Lawrence CR; Le Jeune M; Lesgourgues J; Levrier F; Lewis A; Liguori M; Lilje PB; Lindholm V; López-Caniego M; Lubin PM; Ma YZ, 2020, 'Planck 2018 results: X. Constraints on inflation', Astronomy and Astrophysics, 641, http://dx.doi.org/10.1051/0004-6361/201833887

Journal articles | 2020

Akrami Y; Arroja F; Ashdown M; Aumont J; Baccigalupi C; Ballardini M; Banday AJ; Barreiro RB; Bartolo N; Basak S; Benabed K; Bernard JP; Bersanelli M; Bielewicz P; Bond JR; Borrill J; Bouchet FR; Bucher M; Burigana C; Butler RC; Calabrese E; Cardoso JF; Casaponsa B; Challinor A; Chiang HC; Colombo LPL; Combet C; Crill BP; Cuttaia F; De Bernardis P; De Rosa A; De Zotti G; Delabrouille J; Delouis JM; Di Valentino E; Diego JM; Doré O; Douspis M; Ducout A; Dupac X; Dusini S; Efstathiou G; Elsner F; Enßlin TA; Eriksen HK; Fantaye Y; Fergusson J; Fernandez-Cobos R; Finelli F; Frailis M; Fraisse AA; Franceschi E; Frolov A; Galeotta S; Galli S; Ganga K; Génova-Santos RT; Gerbino M; González-Nuevo J; Górski KM; Gratton S; Gruppuso A; Gudmundsson JE; Hamann J; Handley W; Hansen FK; Herranz D; Hivon E; Huang Z; Jaffe AH; Jones WC; Jung G; Keihänen E; Keskitalo R; Kiiveri K; Kim J; Krachmalnicoff N; Kunz M; Kurki-Suonio H; Lamarre JM; Lasenby A; Lattanzi M; Lawrence CR; Le Jeune M; Levrier F; Lewis A; Liguori M; Lilje PB; Lindholm V; López-Caniego M; Ma YZ; Maciás-Pérez JF; Maggio G; Maino D; Mandolesi N; Marcos-Caballero A; Maris M; Martin PG; Martínez-González E; Matarrese S, 2020, 'Planck 2018 results: IX. Constraints on primordial non-Gaussianity', Astronomy and Astrophysics, 641, http://dx.doi.org/10.1051/0004-6361/201935891

Journal articles | 2020

Akrami Y; Ashdown M; Aumont J; Baccigalupi C; Ballardini M; Banday AJ; Barreiro RB; Bartolo N; Basak S; Benabed K; Bersanelli M; Bielewicz P; Bock JJ; Bond JR; Borrill J; Bouchet FR; Boulanger F; Bucher M; Burigana C; Butler RC; Calabrese E; Cardoso JF; Casaponsa B; Chiang HC; Colombo LPL; Combet C; Contreras D; Crill BP; De Bernardis P; De Zotti G; Delabrouille J; Delouis JM; Di Valentino E; Diego JM; Doré O; Douspis M; Ducout A; Dupac X; Efstathiou G; Elsner F; Enßlin TA; Eriksen HK; Fantaye Y; Fernandez-Cobos R; Finelli F; Frailis M; Fraisse AA; Franceschi E; Frolov A; Galeotta S; Galli S; Ganga K; Génova-Santos RT; Gerbino M; Ghosh T; González-Nuevo J; Górski KM; Gruppuso A; Gudmundsson JE; Hamann J; Handley W; Hansen FK; Herranz D; Hivon E; Huang Z; Jaffe AH; Jones WC; Keihänen E; Keskitalo R; Kiiveri K; Kim J; Krachmalnicoff N; Kunz M; Kurki-Suonio H; Lagache G; Lamarre JM; Lasenby A; Lattanzi M; Lawrence CR; Le Jeune M; Levrier F; Liguori M; Lilje PB; Lindholm V; López-Caniego M; Ma YZ; Maciás-Pérez JF; Maggio G; Maino D; Mandolesi N; Mangilli A; Marcos-Caballero A; Maris M; Martin PG; Martínez-González E; Matarrese S; Mauri N; McEwen JD; Meinhold PR; Mennella A, 2020, 'Planck 2018 results: VII. Isotropy and statistics of the CMB', Astronomy and Astrophysics, 641, http://dx.doi.org/10.1051/0004-6361/201935201

Journal articles | 2020

Yi K; Guo Y; Fan Y; Hamann J; Wang YG, 2020, 'Cosmo VAE: Variational Autoencoder for CMB Image Inpainting', Proceedings of the International Joint Conference on Neural Networks, http://dx.doi.org/10.1109/IJCNN48605.2020.9207123

Journal articles | 2020

Yi K; Guo Y; Hamann J; Fan Y; Wang Y, 2020, 'CosmoVAE: Variational Autoencoder for CMB Image Inpainting', IEEE Proceedings of the International Joint Conference on Neural Networks (IJCNN)

Journal articles | 2019

Poulter H; Ali-Haïmoud Y; Hamann J; White M; Williams AG, 2019, 'CMB constraints on ultra-light primordial black holes with extended mass distributions', , http://arxiv.org/abs/1907.06485v1

Journal articles | 2017

Aghamousa A; Hamann J; Shafieloo A, 2017, 'A non-parametric consistency test of the ΛCDM model with Planck CMB data', Journal of Cosmology and Astroparticle Physics, 2017, pp. 031 - 031, http://dx.doi.org/10.1088/1475-7516/2017/09/031

Journal articles | 2017

Drewes M; Hamann J, 2017, 'A White Paper on keV Sterile Neutrino Dark Matter', Journal of Cosmology and Astroparticle Physics, 1701, pp. 025 - 025, http://dx.doi.org/10.1088/1475-7516/2017/01/025

Journal articles | 2016

Adam R; others ; Hamann J, 2016, 'Planck 2015 results. I. Overview of products and scientific results', Astron. Astrophys., 594, pp. A1 - A1, http://dx.doi.org/10.1051/0004-6361/201527101

Journal articles | 2016

Ade PAR; others ; Hamann J, 2016, 'Planck 2015 results XVII. Constraints on primordial non-Gaussianity', Astron. Astrophys., 594, pp. A17 - A17, http://dx.doi.org/10.1051/0004-6361/201525836

Journal articles | 2016

Ade PAR; others ; Hamann J, 2016, 'Planck 2015 results. XIII. Cosmological parameters', Astron. Astrophys., 594, pp. A13 - A13, http://dx.doi.org/10.1051/0004-6361/201525830

Journal articles | 2016

Ade PAR; others ; Hamann J, 2016, 'Planck 2015 results. XX. Constraints on inflation', Astronomy & Astrophysics, 594, pp. A20 - A20, http://dx.doi.org/10.1051/0004-6361/201525898

Journal articles | 2016

Aghanim N; others ; Hamann J, 2016, 'Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters', Astron. Astrophys., 594, pp. A11 - A11, http://dx.doi.org/10.1051/0004-6361/201526926

Journal articles | 2016

Xu Y; Hamann J; Chen X, 2016, 'Precise measurements of inflationary features with 21 cm observations', Phys. Rev., D94, pp. 123518 - 123518, http://dx.doi.org/10.1103/PhysRevD.94.123518

Journal articles | 2015

Archidiacono M; Basse T; Hamann J; Hannestad S; Raffelt G; Wong YYY, 2015, 'Future cosmological sensitivity for hot dark matter axions', JCAP, 1505, pp. 050 - 050, http://dx.doi.org/10.1088/1475-7516/2015/05/050

Journal articles | 2015

Archidiacono M; Basse T; Hamann J; Hannestad S; Raffelt G; Wong YYY, 2015, 'Future cosmological sensitivity for hot dark matter axions', JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, http://dx.doi.org/10.1088/1475-7516/2015/05/50

Journal articles | 2015

Basse T; Hamann J; Hannestad S; Wong YYY, 2015, 'Getting leverage on inflation with a large photometric redshift survey', JCAP, 1506, pp. 042 - 042, http://dx.doi.org/10.1088/1475-7516/2015/06/042

Journal articles | 2015

Chluba J; Hamann J; Patil SP, 2015, 'Features and New Physical Scales in Primordial Observables: Theory and Observation', Int. J. Mod. Phys., D24, pp. 1530023 - 1530023, http://dx.doi.org/10.1142/S0218271815300232

Journal articles | 2014

Ade PAR; others , 2014, 'Planck 2013 results. I. Overview of products and scientific results', Astron. Astrophys., 571, pp. A1 - A1, http://dx.doi.org/10.1051/0004-6361/201321529

Journal articles | 2014

Ade PAR; others , 2014, 'Planck 2013 results. XVI. Cosmological parameters', Astron. Astrophys., 571, pp. A16 - A16, http://dx.doi.org/10.1051/0004-6361/201321591

Journal articles | 2014

Ade PAR; others , 2014, 'Planck 2013 results. XXII. Constraints on inflation', Astron. Astrophys., 571, pp. A22 - A22, http://dx.doi.org/10.1051/0004-6361/201321569

Journal articles | 2014

Basse T; Bjaelde OE; Hamann J; Hannestad S; Wong YYY, 2014, 'Dark energy properties from large future galaxy surveys', JCAP, 1405, pp. 021 - 021, http://dx.doi.org/10.1088/1475-7516/2014/05/021

Journal articles | 2014

Hannestad S; Hamann J; Wong YYY, 2014, 'Current and future constraints on neutrino physics from cosmology', J. Phys. Conf. Ser., 485, pp. 012008 - 012008, http://dx.doi.org/10.1088/1742-6596/485/1/012008

Journal articles | 2013

Hamann J; Hasenkamp J, 2013, 'A new life for sterile neutrinos: resolving inconsistencies using hot dark matter', JCAP, 1310, pp. 044 - 044, http://dx.doi.org/10.1088/1475-7516/2013/10/044

Journal articles | 2012

Abazajian KN; others , 2012, 'Light Sterile Neutrinos: A White Paper', Light Sterile Neutrinos: A White Paper

Journal articles | 2012

Arina C; Hamann J; Trotta R; Wong YYY, 2012, 'Evidence for dark matter modulation in CoGeNT', JCAP, 1203, pp. 008 - 008, http://dx.doi.org/10.1088/1475-7516/2012/03/008

Journal articles | 2012

Hamann J; Hannestad S; Raffelt GG; Tamborra I; Wong YYY, 2012, 'Sterile neutrino constraints from cosmology', J. Phys. Conf. Ser., 375, pp. 032003 - 032003, http://dx.doi.org/10.1088/1742-6596/375/1/032003

Journal articles | 2012

Hamann J; Hannestad S; Wong YYY, 2012, 'Measuring neutrino masses with a future galaxy survey', JCAP, 1211, pp. 052 - 052, http://dx.doi.org/10.1088/1475-7516/2012/11/052

Journal articles | 2012

Hamann J, 2012, 'Evidence for extra radiation? Profile likelihood versus Bayesian posterior', JCAP, 1203, pp. 021 - 021, http://dx.doi.org/10.1088/1475-7516/2012/03/021

Journal articles | 2011

Arina C; Hamann J; Wong YYY, 2011, 'A Bayesian view of the current status of dark matter direct searches', JCAP, 1109, pp. 022 - 022, http://dx.doi.org/10.1088/1475-7516/2011/09/022

Journal articles | 2011

Hamann J; Hannestad S; Raffelt GG; Tamborra I; Wong YYY, 2011, 'Cosmology seeking friendship with sterile neutrinos', Nucl. Phys. Proc. Suppl., 217, pp. 72 - 74, http://dx.doi.org/10.1016/j.nuclphysbps.2011.04.072

Journal articles | 2011

Hamann J; Hannestad S; Raffelt GG; Wong YYY, 2011, 'Sterile neutrinos with eV masses in cosmology: How disfavoured exactly?', JCAP, 1109, pp. 034 - 034, http://dx.doi.org/10.1088/1475-7516/2011/09/034

Journal articles | 2010

Finelli F; Hamann J; Leach SM; Lesgourgues J, 2010, 'Single-field inflation constraints from CMB and SDSS data', JCAP, 1004, pp. 011 - 011, http://dx.doi.org/10.1088/1475-7516/2010/04/011

Journal articles | 2010

Hamann J; Hannestad S; Lesgourgues J; Rampf C; Wong YYY, 2010, 'Cosmological parameters from large scale structure - geometric versus shape information', JCAP, 1007, pp. 022 - 022, http://dx.doi.org/10.1088/1475-7516/2010/07/022

Journal articles | 2010

Hamann J; Hannestad S; Raffelt GG; Tamborra I; Wong YYY, 2010, 'Cosmology seeking friendship with sterile neutrinos', Phys. Rev. Lett., 105, pp. 181301 - 181301, http://dx.doi.org/10.1103/PhysRevLett.105.181301

Journal articles | 2010

Hamann J; Shafieloo A; Souradeep T, 2010, 'Features in the primordial power spectrum? A frequentist analysis', JCAP, 1004, pp. 010 - 010, http://dx.doi.org/10.1088/1475-7516/2010/04/010

Journal articles | 2010

Raffelt GG; Hamann J; Hannestad S; Mirizzi A; Wong YYY, 2010, 'Axion bounds from precision cosmology', AIP Conf. Proc., 1274, pp. 66 - 71, http://dx.doi.org/10.1063/1.3489559

Journal articles | 2009

Hamann J; Balbi A; Lesgourgues J; Quercellini C, 2009, 'Optimising Boltzmann codes for the Planck era', JCAP, 0904, pp. 011 - 011, http://dx.doi.org/10.1088/1475-7516/2009/04/011

Journal articles | 2009

Hamann J; Hannestad S; Raffelt GG; Wong YYY, 2009, 'Isocurvature forecast in the anthropic axion window', JCAP, 0906, pp. 022 - 022, http://dx.doi.org/10.1088/1475-7516/2009/06/022

Journal articles | 2008

Hamann J; Hannestad S; Melchiorri A; Wong YYY, 2008, 'Nonlinear corrections to the cosmological matter power spectrum and scale-dependent galaxy bias: Implications for parameter estimation', JCAP, 0807, pp. 017 - 017, http://dx.doi.org/10.1088/1475-7516/2008/07/017

Journal articles | 2008

Hamann J; Hannestad S; Sloth MS; Wong YYY, 2008, 'Observing trans-Planckian ripples in the primordial power spectrum with future large scale structure probes', JCAP, 0809, pp. 015 - 015, http://dx.doi.org/10.1088/1475-7516/2008/09/015

Journal articles | 2008

Hamann J; Lesgourgues J; Mangano G, 2008, 'Using BBN in cosmological parameter extraction from CMB: A Forecast for PLANCK', JCAP, 0803, pp. 004 - 004, http://dx.doi.org/10.1088/1475-7516/2008/03/004

Journal articles | 2008

Hamann J; Lesgourgues J; Valkenburg W, 2008, 'How to constrain inflationary parameter space with minimal priors', JCAP, 0804, pp. 016 - 016, http://dx.doi.org/10.1088/1475-7516/2008/04/016

Journal articles | 2008

Hamann J; Wong YYY, 2008, 'Effects of CMB temperature uncertainties on cosmological parameter estimation', JCAP, 0803, pp. 025 - 025, http://dx.doi.org/10.1088/1475-7516/2008/03/025

Journal articles | 2008

Valkenburg W; Hamann J; Krauss LM, 2008, 'Effects of Prior Assumptions on Bayesian Estimates of Inflation Parameters, and the expected Gravitational Waves Signal from Inflation', Phys. Rev., D78, pp. 063521 - 063521, http://dx.doi.org/10.1103/PhysRevD.78.0635212

Journal articles | 2008

Valkenburg W; Krauss LM; Hamann J, 2008, 'Impact of prior assumptions on Bayesian estimates of inflation parameters and the expected gravitational waves signal from inflation', Physical Review D - Particles, Fields, Gravitation and Cosmology, 78, http://dx.doi.org/10.1103/PhysRevD.78.063521

Journal articles | 2007

Hamann J; Covi L; Melchiorri A; Slosar A, 2007, 'New Constraints on Oscillations in the Primordial Spectrum of Inflationary Perturbations', Phys. Rev., D76, pp. 023503 - 023503, http://dx.doi.org/10.1103/PhysRevD.76.023503

Journal articles | 2007

Hamann J; Hannestad S; Raffelt GG; Wong YYY, 2007, 'Observational bounds on the cosmic radiation density', Journal of Cosmology and Astroparticle Physics, 0708, pp. 021 - 021, http://dx.doi.org/10.1088/1475-7516/2007/08/021

Journal articles | 2007

Hamann J; Hannestad S; Sloth MS; Wong YYY, 2007, 'How robust are inflation model and dark matter constraints from cosmological data?', Phys. Rev., D75, pp. 023522 - 023522, http://dx.doi.org/10.1103/PhysRevD.75.023522

Journal articles | 2006

Covi L; Hamann J; Melchiorri A; Slosar A; Sorbera I, 2006, 'Inflation and WMAP three year data: Features have a Future!', Phys. Rev., D74, pp. 083509 - 083509, http://dx.doi.org/10.1103/PhysRevD.74.083509
Working Papers | 2022

Yi K; Chen J; Zhou B; Lio P; Fan Y; Hamann J, 2022, Approximate Equivariance SO(3) Needlet Convolution, http://dx.doi.org, https://arxiv.org/abs/2206.10385

Working Papers | 2019

Hamann J; Gia QTL; Sloan IH; Wang YG; Womersley RS, 2019, A New Probe of Gaussianity and Isotropy applied to the CMB Maps, http://dx.doi.org, http://arxiv.org/abs/1911.11442v2
Preprints | 2023

Hamann J; Gia QTL; Sloan IH; Womersley RS, 2023, Removing the mask -- reconstructing a scalar field on the sphere from a masked field, http://dx.doi.org/10.1137/23M1603157

Preprints | 2023

Hamann J; Kang Y, 2023, A Minkowski Functional Analysis of the Cosmic Microwave Background Weak Lensing Convergence, http://dx.doi.org/10.1088/1475-7516/2024/05/076

Preprints | 2023

Wons J; Dimastrogiovanni E; Fasiello M; Hamann J; Johnson MC, 2023, Enhancing Bispectrum Estimators for Galaxy Redshift Surveys with Velocities, http://dx.doi.org/10.1103/PhysRevD.108.L021305

Preprints | 2022

Hamann J; Malhotra A, 2022, Constraining primordial tensor features with the anisotropies of the Cosmic Microwave Background, http://dx.doi.org/10.1088/1475-7516/2022/12/015

Preprints | 2021

Hamann J; Wons J, 2021, Optimising Inflationary Features the Bayesian Way, http://dx.doi.org/10.1088/1475-7516/2022/03/036

Preprints | 2019

Hamann J; Gia QTL; Sloan IH; Wang YG; Womersley RS, 2019, A New Probe of Gaussianity and Isotropy applied to the CMB Maps, http://dx.doi.org/10.48550/arxiv.1911.11442

Conference Papers | 2009

Hannestad S; Hamann J; Mirizzi A; Raffelt GG; Wong YYY, 2009, 'Cosmological axion bounds', in Proceedings, 5th Patras Workshop on Axions, WIMPs and WISPs (AXION-WIMP 2009): Durham, UK, July 13-17, 2009, pp. 141 - 144, http://dx.doi.org/10.3204/DESY-PROC-2009-05/hannestad_steen

Theses / Dissertations | 2007

Hamann J, 2007, Inflation and Cosmological Parameter Estimation, phdthesis, Hamburg U., http://dx.doi.org/10.3204/DESY-THESIS-2007-016

My Research Supervision

Yuqi Kang (PhD, primary supervisor)
Julius Wons (PhD, primary supervisor)
Nathan Cohen (PhD, primary supervisor)
Kai Yi (PhD, secondary supervisor)
Jahanvi Maheshwari (Honours)

My Teaching

PHYS1241 Higher Physics 1B (Special) [T2]
PHYS4143 General Relativity [T2]
PHYS3115 Particle Physics and the Early Universe [T3]

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Dr Jan Hamann