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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.

Professor Roger Davies

Emeritus Wetton Professor

Research theme

  • Astronomy and astrophysics
  • Instrumentation

Sub department

  • Astrophysics

Research groups

  • Astronomical instrumentation
  • Cosmology
  • Galaxy formation and evolution
  • Hintze Centre for Astrophysical Surveys
  • Rubin-LSST
  • Extremely Large Telescope
Roger.Davies@physics.ox.ac.uk
  • About
  • Publications

E-INSPIRE – I. Bridging the gap with the local Universe: stellar population of a statistical sample of ultra-compact massive galaxies at z < 0.3

Monthly Notices of the Royal Astronomical Society Oxford University Press 541:3 (2025) 2440-2458

Authors:

John Mills, Chiara Spiniello, Alexey Sergeyev, Crescenzo Tortora, Vladyslav Khramtsov, Giuseppe D’Ago, Michalina Maksymowicz-Maciata, João PV Benedetti, Anna Ferré-Mateu, Michele Cappellari, Roger Davies, Johanna Hartke, Charles Rosen

Abstract:

This paper presents the first effort to Extend the Investigation of Stellar Populations In RElics (E-INSPIRE). We present a catalogue of 430 spectroscopically confirmed ultra-compact massive galaxies (UCMGs) from the Sloan Digital Sky Survey at redshifts . This increases the original INSPIRE sample eightfold, bridging the gap with the local Universe. For each object, we compute integrated stellar velocity dispersion, age, metallicity, and [Mg/Fe] through spectroscopic stellar population analysis. We infer star formation histories (SFHs), metallicity evolution histories (MEHs) and compute the Degree of Relicness (DoR) of each object. The UCMGs, covering a wide range of DoR from 0.05 to 0.88, can be divided into three groups, according to how extreme their SFH was. The first group consists of 81 extreme relics () that have formed the totality of their stellar mass by and have super-solar metallicities at all cosmic epochs. The second group () contains 293 objects also characterized by peaked SFHs but with a small percentage of later-formed stars and with a variety of MEHs. The third group (), has 56 objects that cannot be considered relics since they have extended SFHs and formed a non-negligible fraction ( per cent) of their stellar mass at . We conclude that the most efficient method of finding relics is to select UCMGs with a combination of large velocity dispersion values (as already found by INSPIRE), super-solar metallicities and high [Mg/Fe].
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The ALMA-CRISTAL survey

Astronomy & Astrophysics EDP Sciences 689 (2024) a145

Authors:

M Solimano, J González-López, M Aravena, R Herrera-Camus, I De Looze, NM Förster Schreiber, J Spilker, K Tadaki, RJ Assef, L Barcos-Muñoz, RL Davies, T Díaz-Santos, A Ferrara, DB Fisher, L Guaita, R Ikeda, EJ Johnston, D Lutz, I Mitsuhashi, C Moya-Sierralta, M Relaño, T Naab, AC Posses, K Telikova, H Übler, S van der Giessen, S Veilleux, V Villanueva
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Using the motion of S2 to constrain vector clouds around Sgr A*

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 530:4 (2024) 3740-3751

Authors:

A Foschi, R Abuter, K Abd El Dayem, N Aimar, P Amaro Seoane, A Amorim, JP Berger, H Bonnet, G Bourdarot, W Brandner, R Davies, PT de Zeeuw, D Defrère, J Dexter, A Drescher, A Eckart, F Eisenhauer, NM Förster Schreiber, PJV Garcia, R Genzel, S Gillessen, T Gomes, X Haubois, G Heißel, Th Henning, L Jochum, L Jocou, A Kaufer, L Kreidberg, S Lacour, V Lapeyrère, J-B Le Bouquin, P Léna, D Lutz, F Mang, F Millour, T Ott, T Paumard, K Perraut, G Perrin, O Pfuhl, S Rabien, DC Ribeiro, M Sadun Bordoni, S Scheithauer, J Shangguan, T Shimizu, J Stadler, C Straubmeier, E Sturm, M Subroweit, LJ Tacconi, F Vincent, S von Fellenberg, J Woillez
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An ∼600 pc View of the Strongly Lensed, Massive Main-sequence Galaxy J0901: A Baryon-dominated, Thick Turbulent Rotating Disk with a Clumpy Cold Gas Ring at z = 2.259

The Astrophysical Journal American Astronomical Society 942:2 (2023) 98

Authors:

Daizhong Liu, NM Förster Schreiber, R Genzel, D Lutz, SH Price, LL Lee, Andrew J Baker, A Burkert, RT Coogan, RI Davies, RL Davies, R Herrera-Camus, Tadayuki Kodama, Lee Minju M., A Nestor, C Pulsoni, A Renzini, Chelsea E Sharon, TT Shimizu, LJ Tacconi, Ken-ichi Tadaki, H Übler
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First light for GRAVITY Wide

Astronomy & Astrophysics EDP Sciences 665 (2022) a75

Authors:

R Abuter, F Allouche, A Amorim, C Bailet, M Bauböck, J-P Berger, P Berio, A Bigioli, O Boebion, ML Bolzer, H Bonnet, G Bourdarot, P Bourget, W Brandner, Y Clénet, B Courtney-Barrer, Y Dallilar, R Davies, D Defrère, A Delboulbé, F Delplancke, R Dembet, PT de Zeeuw, A Drescher, A Eckart, C Édouard, F Eisenhauer, M Fabricius, H Feuchtgruber, G Finger, NM Förster Schreiber, E Garcia, P Garcia, F Gao, E Gendron, R Genzel, JP Gil, S Gillessen, T Gomes, F Gonté, C Gouvret, P Guajardo, S Guieu, M Hartl, X Haubois, F Haußmann, G Heißel, Th Henning, S Hippler, S Hönig, M Horrobin, N Hubin, E Jacqmart, L Jochum, L Jocou, A Kaufer, P Kervella, H Korhonen, L Kreidberg, S Lacour, S Lagarde, O Lai, V Lapeyrère, R Laugier, J-B Le Bouquin, J Leftley, P Léna, D Lutz, F Mang, A Marcotto, D Maurel, A Mérand, F Millour, N More, H Nowacki, M Nowak, S Oberti, T Ott, L Pallanca, L Pasquini, T Paumard, K Perraut, G Perrin, R Petrov, O Pfuhl, N Pourré, S Rabien, C Rau, S Robbe-Dubois, S Rochat, M Salman, M Schöller, J Schubert, N Schuhler, J Shangguan, T Shimizu, S Scheithauer, A Sevin, F Soulez, A Spang, E Stadler, J Stadler, C Straubmeier, E Sturm, LJ Tacconi, KRW Tristram, F Vincent, S von Fellenberg, S Uysal, F Widmann, E Wieprecht, E Wiezorrek, J Woillez, S Yazici, A Young, G Zins
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