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Department of Applied Mathematics and Theoretical Physics

Career

  • 2017-present Professor of Cosmology and Astrophysics
    • Deputy Director, Institute of Astromony
    • Deputy Director, Kavli Institute for Cosmology, Cambridge
  • 2011-2017 Reader in Astrophysics and Cosmology
  • 2006 -2011 University Lecturer, Institute of Astronomy and DAMTP
  • 2002 -2007 Royal Society University Research Fellow
  • 2000 -2002 PPARC Postdoctoral Research Fellow
  • 1998 -present Fellow, Queens' College

Research

I have a range of research interests in physical and theoretical cosmology, mostly centred on the issue of testing the cosmological model and the origin of cosmic structure with cosmological observations. A particular focus is the the origin, interpretation, and measurement of temperature anisotropies and polarization in the CMB. I am a Core Team member of the Planck High-Frequency Instrument and a member of the Simons Observatory with particular interests in lensing of the CMB, constraining the key cosmological parameters and searching for B-mode polarization induced by gravitational waves from the early universe.

Selected Publications

Publications list on ADS

 

Publications

The Atacama Cosmology Telescope: High-redshift measurement of structure growth from the cross-correlation of Quaia quasars and CMB lensing from ACT DR6 and $\textit{Planck}$ PR4
CE Villagra, G Farren, G Fabbian, B Bolliet, I Abril-Cabezas, D Alonso, A Challinor, J Dunkley, J Kim, N MacCrann, F McCarthy, K Moodley, FJ Qu, B Sherwin, C Sifon, AV Engelen, EJ Wollack
(2025)
Unified and consistent structure growth measurements from joint ACT, SPT and \textit{Planck} CMB lensing
FJ Qu, F Ge, WLK Wu, I Abril-Cabezas, MS Madhavacheril, M Millea, Z Ahmed, E Anderes, AJ Anderson, B Ansarinejad, M Archipley, Z Atkins, L Balkenhol, N Battaglia, K Benabed, AN Bender, BA Benson, F Bianchini, LE Bleem, B Bolliet, JR Bond, FR Bouchet, L Bryant, E Calabrese, E Camphuis, JE Carlstrom, J Carron, A Challinor, CL Chang, P Chaubal, G Chen, PM Chichura, SK Choi, A Chokshi, T-L Chou, A Coerver, W Coulton, TM Crawford, C Daley, O Darwish, TD Haan, MJ Devlin, KR Dibert, MA Dobbs, M Doohan, A Doussot, AJ Duivenvoorden, J Dunkley, R Dunner, D Dutcher, CE Villagra, W Everett, GS Farren, C Feng, S Ferraro, KR Ferguson, K Fichman, E Finson, A Foster, PA Gallardo, S Galli, AE Gambrel, RW Gardner, N Goeckner-Wald, R Gualtieri, F Guidi, S Guns, M Halpern, NW Halverson, JC Hill, M Hilton, E Hivon, GP Holder, WL Holzapfel, JC Hood, D Howe, A Hryciuk, N Huang, J Hubmayr, F Kéruzoré, AR Khalife, J Kim, L Knox, M Korman, K Kornoelje, A Kosowsky, C-L Kuo, HT Jense, AL Posta, K Levy, AE Lowitz, T Louis, C Lu, GP Lynch, N MacCrann, A Maniyar, ES Martsen, J McMahon, F Menanteau, J Montgomery, Y Nakato, K Moodley, T Namikawa, T Natoli, MD Niemack, GI Noble, Y Omori, A Ouellette, LA Page, Z Pan, P Paschos, KA Phadke, AW Pollak, K Prabhu, W Quan, S Raghunathan, M Rahimi, A Rahlin, CL Reichardt, D Riebel, M Rouble, JE Ruhl, E Schaan, E Schiappucci, N Sehgal, CE Sierra, A Simpson, BD Sherwin, C Sifón, DN Spergel, ST Staggs, JA Sobrin, AA Stark, J Stephen, C Tandoi, B Thorne, C Trendafilova, C Umilta, AV Engelen, JD Vieira, A Vitrier, Y Wan, N Whitehorn, EJ Wollack, MR Young, JA Zebrowski
(2025)
Extracting cosmological information from the abundance of galaxy clusters with simulation-based inference
Í Zubeldia, B Bolliet, A Challinor, W Handley
(2025)
The Simons Observatory: Science Goals and Forecasts for the Enhanced Large Aperture Telescope
TSO Collaboration, M Abitbol, I Abril-Cabezas, S Adachi, P Ade, AE Adler, P Agrawal, J Aguirre, Z Ahmed, S Aiola, T Alford, A Ali, D Alonso, MA Alvarez, R An, K Arnold, P Ashton, Z Atkins, J Austermann, S Azzoni, C Baccigalupi, AB Lizancos, D Barron, P Barry, J Bartlett, N Battaglia, R Battye, E Baxter, A Bazarko, JA Beall, R Bean, D Beck, S Beckman, J Begin, A Beheshti, B Beringue, T Bhandarkar, S Bhimani, F Bianchini, E Biermann, S Biquard, B Bixler, S Boada, D Boettger, B Bolliet, JR Bond, J Borrill, J Borrow, C Braithwaite, TLR Brien, ML Brown, SM Bruno, S Bryan, R Bustos, H Cai, E Calabrese, V Calafut, FM Carl, A Carones, J Carron, A Challinor, P Chanial, N Chen, K Cheung, B Chiang, Y Chinone, J Chluba, HS Cho, SK Choi, M Chu, J Clancy, SE Clark, P Clarke, J Cleary, DL Clements, J Connors, C Contaldi, G Coppi, L Corbett, NF Cothard, W Coulton, KD Crowley, KT Crowley, A Cukierman, JM D'Ewart, K Dachlythra, R Datta, S Day-Weiss, TD Haan, M Devlin, LD Mascolo, S Dicker, B Dober, C Doux, P Dow, S Doyle, CJ Duell, SM Duff, AJ Duivenvoorden, J Dunkley, D Dutcher, R Dünner, M Edenton, HE Bouhargani, J Errard, G Fabbian, V Fanfani, GS Farren, J Fergusson, S Ferraro, R Flauger, A Foster, K Freese, JC Frisch, A Frolov, G Fuller, N Galitzki, PA Gallardo, JTG Ghersi, K Ganga, J Gao, X Garrido, E Gawiser, M Gerbino, R Gerras, S Giardiello, A Gill, V Gilles, U Giri, E Gleave, V Gluscevic, N Goeckner-Wald, JE Golec, S Gordon, M Gralla, S Gratton, D Green, JC Groh, C Groppi, Y Guan, N Gupta, JE Guðmundsson, S Hagstotz, P Hargrave, S Haridas, K Harrington, I Harrison, M Hasegawa, M Hasselfield, V Haynes, M Hazumi, A He, E Healy, SW Henderson, BS Hensley, E Hertig, C Hervías-Caimapo, M Higuchi, CA Hill, JC Hill, G Hilton, M Hilton, AD Hincks, G Hinshaw, R Hložek, AYQ Ho, S Ho, SP Ho, TD Hoang, J Hoh, E Hornecker, AL Hornsby, SC Hotinli, Z Huang, ZB Huber, J Hubmayr, K Huffenberger, JP Hughes, AI Lonappan, M Ikape, K Irwin, J Iuliano, AH Jaffe, B Jain, HT Jense, O Jeong, A Johnson, BR Johnson, M Johnson, M Jones, B Jost, D Kaneko, ED Karpel, Y Kasai, N Katayama, B Keating, B Keller, R Keskitalo, J Kim, T Kisner, K Kiuchi, J Klein, K Knowles, AM Kofman, BJ Koopman, A Kosowsky, R Kou, N Krachmalnicoff, D Kramer, A Krishak, A Krolewski, A Kusaka, A Kusiak, PL Plante, AL Posta, A Laguë, J Lashner, M Lattanzi, A Lee, E Lee, J Leech, C Lessler, JS Leung, A Lewis, Y Li, Z Li, M Limon, L Lin, M Link, J Liu, Y Liu, J Lonergan, T Louis, T Lucas, M Ludlam, M Lungu, M Lyons, N MacCrann, A MacInnis, M Madhavacheril, D Mak, F Maldonado, M Mallaby-Kay, A Manduca, A Mangu, H Mani, AS Maniyar, GA Marques, J Mates, T Matsumura, P Mauskopf, A May, N McCallum, H McCarrick, F McCarthy, M McCulloch, J McMahon, PD Meerburg, Y Mehta, J Melin, J Meyers, A Middleton, A Miller, M Mirmelstein, K Moodley, J Moore, M Morshed, T Morton, E Moser, T Mroczkowski, M Murata, M Münchmeyer, S Naess, H Nakata, T Namikawa, M Nashimoto, F Nati, P Natoli, M Negrello, SK Nerval, L Newburgh, DV Nguyen, A Nicola, MD Niemack, H Nishino, Y Nishinomiya, A Orlando, J Orlowski-Scherer, L Pagano, LA Page, S Pandey, A Papageorgiou, I Paraskevakos, B Partridge, R Patki, M Peel, KP Sarmiento, F Perrotta, P Phakathi, L Piccirillo, E Pierpaoli, T Pinsonneault-Marotte, G Pisano, D Poletti, R Puddu, G Puglisi, FJ Qu, MJ Randall, C Ranucci, C Raum, R Reeves, CL Reichardt, M Remazeilles, Y Rephaeli, D Riechers, J Robe, MF Robertson, N Robertson, K Rogers, F Rojas, A Romero, E Rosenberg, A Rotti, S Rowe, A Roy, S Sadeh, N Sailer, K Sakaguri, T Sakuma, Y Sakurai, M Salatino, GH Sanders, D Sasaki, MS Rao, TP Satterthwaite, L Saunders, L Scalcinati, E Schaan, B Schmitt, M Schmittfull, N Sehgal, J Seibert, Y Seino, U Seljak, S Shaikh, E Shaw, P Shellard, B Sherwin, M Shimon, JE Shroyer, C Sierra, J Sievers, C Sifón, P Sikhosana, M Silva-Feaver, SM Simon, A Sinclair, K Smith, W Sohn, X Song, RF Sonka, D Spergel, J Spisak, ST Staggs, G Stein, JR Stevens, R Stompor, E Storer, R Sudiwala, J Sugiyama, KM Surrao, S Sutariya, A Suzuki, J Suzuki, O Tajima, S Takakura, A Takeuchi, I Tansieri, AC Taylor, G Teply, T Terasaki, A Thomas, DB Thomas, R Thornton, H Trac, T Tsan, ETK Sang, C Tucker, J Ullom, L Vacher, L Vale, AV Engelen, JV Lanen, JV Marrewijk, DDV Winkle, C Vargas, EM Vavagiakis, I Veenendaal, C Vergès, M Vissers, M Viña, K Wagoner, S Walker, L Walters, Y Wang, B Westbrook, J Williams, P Williams, H Winch, EJ Wollack, K Wolz, J Wong, Z Xu, K Yamada, E Young, B Yu, C Yu, M Zannoni, K Zheng, N Zhu, A Zonca, I Zubeldia
(2025)
Filtering in CMB data analysis with application to ACT DR4 and Planck observations
E Rosenberg, S Gratton, A Challinor
(2024)
Optimizing the Evolution of Perturbations in the $Λ$CDM Universe
N Choustikov, Z Vlah, A Challinor
– Journal of Cosmology and Astroparticle Physics
(2024)
012
The Simons Observatory: Combining cross-spectral foreground cleaning with multitracer B-mode delensing for improved constraints on inflation
E Hertig, K Wolz, T Namikawa, AB Lizancos, S Azzoni, I Abril-Cabezas, D Alonso, C Baccigalupi, E Calabrese, A Challinor, J Errard, G Fabbian, C Hervías-Caimapo, B Jost, N Krachmalnicoff, AI Lonappan, M Morshed, L Pagano, B Sherwin
– Physical Review D
(2024)
110,
043532
LiteBIRD science goals and forecasts: improving sensitivity to inflationary gravitational waves with multitracer delensing
T Namikawa, AI Lonappan, C Baccigalupi, N Bartolo, D Beck, K Benabed, A Challinor, P Diego-Palazuelos, J Errard, S Farrens, A Gruppuso, N Krachmalnicoff, M Migliaccio, E Martínez-González, V Pettorino, G Piccirilli, M Ruiz-Granda, B Sherwin, J Starck, P Vielva, R Akizawa, A Anand, J Aumont, R Aurlien, S Azzoni, M Ballardini, AJ Banday, RB Barreiro, M Bersanelli, D Blinov, M Bortolami, T Brinckmann, E Calabrese, P Campeti, A Carones, F Carralot, FJ Casas, K Cheung, L Clermont, F Columbro, G Conenna, A Coppolecchia, F Cuttaia, G D'Alessandro, P de Bernardis, T de Haan, M De Petris, S Della Torre, E Di Giorgi, HK Eriksen, F Finelli, C Franceschet, U Fuskeland, G Galloni, M Galloway, M Georges, M Gerbino, M Gervasi, T Ghigna, S Giardiello, C Gimeno-Amo, E Gjerløw, M Hazumi, S Henrot-Versillé, LT Hergt, E Hivon, K Kohri, E Komatsu, L Lamagna, M Lattanzi, C Leloup, M Lembo, M López-Caniego, G Luzzi, B Maffei, S Masi, M Massa, S Matarrese, T Matsumura, S Micheli, A Moggi, M Monelli, L Montier, G Morgante, B Mot, L Mousset, R Nagata, P Natoli, A Novelli, I Obata, A Occhiuzzi, L Pagano, A Paiella, D Paoletti, G Pascual-Cisneros, V Pavlidou, F Piacentini, M Pinchera, G Pisano, G Polenta, G Puglisi, M Remazeilles, A Ritacco, A Rizzieri, J Rubino-Martin, Y Sakurai, D Scott, M Shiraishi, G Signorelli, SL Stever, Y Takase, H Tanimura, A Tartari, K Tassis, L Terenzi, M Tristram, L Vacher, B van Tent, IK Wehus, G Weymann-Despres, M Zannoni, Y Zhou, TL collaboration
– Journal of Cosmology and Astroparticle Physics
(2024)
2024,
010
LiteBIRD science goals and forecasts: a full-sky measurement of gravitational lensing of the CMB
AI Lonappan, T Namikawa, G Piccirilli, P Diego-Palazuelos, M Ruiz-Granda, M Migliaccio, C Baccigalupi, N Bartolo, D Beck, K Benabed, A Challinor, J Errard, S Farrens, A Gruppuso, N Krachmalnicoff, E Martínez-González, V Pettorino, B Sherwin, J Starck, P Vielva, R Akizawa, A Anand, J Aumont, R Aurlien, S Azzoni, M Ballardini, AJ Banday, RB Barreiro, M Bersanelli, D Blinov, M Bortolami, T Brinckmann, E Calabrese, P Campeti, A Carones, F Carralot, FJ Casas, K Cheung, L Clermont, F Columbro, G Conenna, A Coppolecchia, F Cuttaia, G D'Alessandro, P de Bernardis, M De Petris, S Della Torre, E Di Giorgi, HK Eriksen, F Finelli, C Franceschet, U Fuskeland, G Galloni, M Galloway, M Georges, M Gerbino, M Gervasi, RT Génova-Santos, T Ghigna, S Giardiello, C Gimeno-Amo, E Gjerløw, M Hazumi, S Henrot-Versillé, LT Hergt, E Hivon, K Kohri, E Komatsu, L Lamagna, M Lattanzi, C Leloup, M Lembo, M López-Caniego, G Luzzi, J Macias-Perez, B Maffei, S Masi, M Massa, S Matarrese, T Matsumura, S Micheli, A Moggi, M Monelli, L Montier, G Morgante, B Mot, L Mousset, R Nagata, P Natoli, A Novelli, I Obata, A Occhiuzzi, L Pagano, A Paiella, D Paoletti, G Pascual-Cisneros, V Pavlidou, F Piacentini, M Pinchera, G Pisano, G Polenta, G Puglisi, M Remazeilles, A Ritacco, A Rizzieri, Y Sakurai, D Scott, M Shiraishi, G Signorelli, SL Stever, Y Takase, H Tanimura, A Tartari, K Tassis, L Terenzi, M Tristram, L Vacher, B van Tent, IK Wehus, G Weymann-Despres, M Zannoni, Y Zhou, TL collaboration
– Journal of Cosmology and Astroparticle Physics
(2024)
2024,
009
The Simons Observatory: Combining delensing and foreground cleaning for improved constraints on inflation
E Hertig, K Wolz, T Namikawa, AB Lizancos, S Azzoni, A Challinor
(2024)
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Research Group

Relativity and Gravitation

Room

B2.08

Telephone

01223 764341