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Black Hole

Lensing of space time around a black hole. At Oxford we study black holes observationally and theoretically on all size and time scales - it is some of our core work.

Credit: ALAIN RIAZUELO, IAP/UPMC/CNRS. CLICK HERE TO VIEW MORE IMAGES.

Christopher Duncan

Visitor

Sub department

  • Astrophysics

Research groups

  • Beecroft Institute for Particle Astrophysics and Cosmology
  • Euclid
christopher.duncan@physics.ox.ac.uk
Telephone: 01865(2)83016
Denys Wilkinson Building, room 555A
  • About
  • Publications

Euclid: Searching for pair-instability supernovae with the Deep Survey⋆

Astronomy & Astrophysics EDP Sciences 666 (2022) a157

Authors:

TJ Moriya, C Inserra, M Tanaka, E Cappellaro, M Della Valle, I Hook, R Kotak, G Longo, F Mannucci, S Mattila, C Tao, B Altieri, A Amara, N Auricchio, D Bonino, E Branchini, M Brescia, J Brinchmann, S Camera, V Capobianco, C Carbone, J Carretero, M Castellano, S Cavuoti, A Cimatti, R Cledassou, G Congedo, CJ Conselice, L Conversi, Y Copin, L Corcione, F Courbin, M Cropper, A Da Silva, H Degaudenzi, M Douspis, F Dubath, CAJ Duncan, X Dupac, S Dusini, A Ealet, S Farrens, S Ferriol, M Frailis, E Franceschi, M Fumana, B Garilli, W Gillard, B Gillis, C Giocoli, A Grazian, F Grupp, SVH Haugan, W Holmes, F Hormuth, A Hornstrup, K Jahnke, S Kermiche, A Kiessling, M Kilbinger, T Kitching, H Kurki-Suonio, S Ligori, PB Lilje, I Lloro, E Maiorano, O Mansutti, O Marggraf, K Markovic, F Marulli, R Massey, HJ McCracken, M Melchior, M Meneghetti, G Meylan, M Moresco, L Moscardini, E Munari, SM Niemi, C Padilla, S Paltani, F Pasian, K Pedersen, V Pettorino, M Poncet, L Popa, F Raison, J Rhodes, G Riccio, E Rossetti, R Saglia, B Sartoris, P Schneider, A Secroun, G Seidel, C Sirignano, G Sirri, L Stanco, P Tallada-Crespí, AN Taylor, I Tereno, R Toledo-Moreo, F Torradeflot, Y Wang, G Zamorani, J Zoubian, S Andreon, V Scottez, PW Morris
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KiDS and Euclid: Cosmological implications of a pseudo angular power spectrum analysis of KiDS-1000 cosmic shear tomography

ASTRONOMY & ASTROPHYSICS 665 (2022) ARTN A56

Authors:

A Loureiro, L Whittaker, A Spurio Mancini, B Joachimi, A Cuceu, M Asgari, B Stolzner, T Troster, AH Wright, M Bilicki, A Dvornik, B Giblin, C Heymans, H Hildebrandt, H Shan, A Amara, N Auricchio, C Bodendorf, D Bonino, E Branchini, M Brescia, V Capobianco, C Carbone, J Carretero, M Castellano, S Cavuoti, A Cimatti, R Cledassou, G Congedo, L Conversi, Y Copin, L Corcione, M Cropper, A Da Silva, M Douspis, F Dubath, CAJ Duncan, X Dupac, S Dusini, S Farrens, S Ferriol, P Fosalba, M Frailis, E Franceschi, M Fumana, B Garilli, B Gillis, C Giocoli, A Grazian, F Grupp, SVH Haugan, W Holmes, F Hormuth, K Jahnke, M Kummel, S Kermiche, A Kiessling, M Kilbinger, T Kitching, K Kuijken, M Kunz, H Kurki-Suonio, S Ligori, PB Lilje, I Lloro, O Mansutti, O Marggraf, K Markovic, F Marulli, R Massey, M Meneghetti, G Meylan, M Moresco, B Morin, L Moscardini, E Munari, SM Niemi, C Padilla, S Paltani, F Pasian, K Pedersen, V Pettorino, S Pires, M Poncet, L Popa, F Raison, J Rhodes, H Rix, M Roncarelli, R Saglia, P Schneider, A Secroun, S Serrano, C Sirignano, G Sirri, L Stanco, JL Starck, P Tallada-Crespi, AN Taylor, I Tereno, R Toledo-Moreo, F Torradeflot, EA Valentijn, Y Wang, N Welikala, J Weller, G Zamorani, J Zoubian, S Andreon, M Baldi, S Camera, R Farinelli, G Polenta, N Tessore
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Euclid preparation XX. The Complete Calibration of the Color-Redshift Relation survey: LBT observations and data release

ASTRONOMY & ASTROPHYSICS 664 (2022) ARTN A196

Authors:

R Saglia, S De Nicola, M Fabricius, V Guglielmo, J Snigula, R Zoeller, R Bender, J Heidt, D Masters, D Stern, S Paltani, A Amara, N Auricchio, M Baldi, C Bodendorf, D Bonino, E Branchini, M Brescia, J Brinchmann, S Camera, V Capobianco, C Carbone, J Carretero, M Castellano, S Cavuoti, R Cledassou, G Congedo, CJ Conselice, L Conversi, Y Copin, L Corcione, F Courbin, M Cropper, A Da Silva, H Degaudenzi, M Douspis, F Dubath, CAJ Duncan, X Dupac, S Dusini, S Farrens, M Frailis, E Franceschi, S Galeotta, B Garilli, W Gillard, B Gillis, C Giocoli, A Grazian, F Grupp, SVH Haugan, H Hoekstra, W Holmes, F Hormuth, A Hornstrup, K Jahnke, M Kuemmel, S Kermiche, A Kiessling, M Kunz, H Kurki-Suonio, R Laureijs, S Ligori, PB Lilje, I Lloro, E Maiorano, O Marggraf, K Markovic, F Marulli, R Massey, HJ McCracken, M Melchior, G Meylan, M Moresco, L Moscardini, E Munari, SM Niemi, C Padilla, F Pasian, K Pedersen, WJ Percival, V Pettorino, S Pires, M Poncet, L Popa, L Pozzetti, F Raison, A Renzi, J Rhodes, G Riccio, E Romelli, E Rossetti, D Sapone, B Sartoris, P Schneider, A Secroun, G Seidel, C Sirignano, G Sirri, L Stanco, P Tallada-Crespi, D Tavagnacco, AN Taylor, I Tereno, R Toledo-Moreo, F Torradeflot, I Tutusaus, EA Valentijn, L Valenziano, T Vassallo, Y Wang, A Zacchei, G Zamorani, J Zoubian, S Andreon, S Bardelli, J Gracia-Carpio, D Maino, N Mauri, A Tramacere, E Zucca, A Alvarez Ayllon, H Aussel, C Baccigalupi, A Balaguera-Antolinez, M Ballardini, A Biviano, M Bolzonella, E Bozzo, C Burigana, R Cabanac, A Cappi, CS Carvalho, S Casas, G Castignani, A Cooray, J Coupon, HM Courtois, S Davini, G Desprez, H Dole, JA Escartin, S Escoffier, M Farina, S Fotopoulou, K Ganga, J Garcia-Bellido, K George, F Giacomini, G Gozaliasl, H Hildebrandt, I Hook, O Ilbert, V Kansal, A Kashlinsky, E Keihanen, CC Kirkpatrick, A Loureiro, J Macias-Perez, M Magliocchetti, G Mainetti, R Maoli, M Martinelli, N Martinet, RB Metcalf, G Morgante, S Nadathur, AA Nucita, L Patrizii, V Popa, Porciani, D Potter, A Pourtsidou, P Reimberg, AG Sanchez, Z Sakr, M Schirmer, E Sefusatti, M Sereno, J Stadel, R Teyssier, C Valieri, J Valiviita, A Veropalumbo, M Viel, Euclid Collaboration
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Euclid: Cosmological forecasts from the void size function

Astronomy & Astrophysics EDP Sciences 667 (2022) A162-A162

Authors:

S Contarini, G Verza, A Pisani, N Hamaus, M Sahlén, C Carbone, S Dusini, F Marulli, L Moscardini, A Renzi, C Sirignano, L Stanco, M Aubert, M Bonici, G Castignani, HM Courtois, S Escoffier, D Guinet, A Kovacs, G Lavaux, E Massara, S Nadathur, G Pollina, T Ronconi, F Ruppin

Abstract:

Peer reviewe
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On cosmological bias due to the magnification of shear and position samples in modern weak lensing analyses

Monthly Notices of the Royal Astronomical Society Oxford University Press 515:1 (2022) 1130-1145

Abstract:

The magnification of galaxies in modern galaxy surveys induces additional correlations in the cosmic shear, galaxy-galaxy lensing and clustering observables used in modern lensing “3x2pt” analyses, due to sample selection. In this paper, we emulate the magnification contribution to all three observables utilising the SLICS simulations suite, and test the sensitivity of the cosmological model, galaxy bias and redshift distribution calibration to un-modelled magnification in a Stage-IV-like survey using Monte-Carlo sampling. We find that magnification cannot be ignored in any single or combined observable, with magnification inducing > 1σ biases in the w0 − σ8 plane, including for cosmic shear and 3x2pt analyses. Significant cosmological biases exist in the 3x2pt and cosmic shear from magnification of the shear sample alone. We show that magnification induces significant biases in the mean of the redshift distribution where a position sample is analysed, which may potentially be used to identify contamination by magnification.
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