Skip to main content
Home
Department Of Physics text logo
  • Research
    • Our research
    • Our research groups
    • Our research in action
    • Research funding support
    • Summer internships for undergraduates
  • Study
    • Undergraduates
    • Postgraduates
  • Engage
    • For alumni
    • For business
    • For schools
    • For the public
Menu
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.

Adrianne Slyz

Professor of Astrophysics

Sub department

  • Astrophysics

Research groups

  • Beecroft Institute for Particle Astrophysics and Cosmology
Adrianne.Slyz@physics.ox.ac.uk
Telephone: 01865 (2)83013
Denys Wilkinson Building, room 555D
  • About
  • Publications

Cosmic reflections I: the structural diversity of simulated and observed low-mass galaxy analogues

(2025)

Authors:

G Martin, AE Watkins, Y Dubois, J Devriendt, S Kaviraj, D Kim, K Kraljic, I Lazar, FR Pearce, S Peirani, C Pichon, A Slyz, SK Yi
Details from ArXiV

The diversity of rotation curves of galaxies in the NewHorizon cosmological simulation

Monthly Notices of the Royal Astronomical Society Oxford University Press 539:4 (2025) 3797-3807

Authors:

RA Jackson, JF Navarro, IME Santos-Santos, S Kaviraj, SK Yi, S Peirani, Y Dubois, G Martin, JEG Devriendt, A Slyz, C Pichon, M Volonteri, T Kimm, K Kraljic

Abstract:

We use the cosmological hydrodynamical simulation NewHorizon to study the effects of the baryonic component on the inner mass profile of dark matter haloes of isolated galaxies (). Dark matter deficits (‘cores’) develop only in galaxies in a narrow range of stellar mass, . The lower stellar mass limit arises because a minimum amount of star formation is required to drive the baryonic outflows that redistribute dark matter and create a core. The upper limit roughly coincides with the total amount of dark matter initially contained within the innermost 2 kpc (), which roughly coincides with the stellar half-mass radius of these dwarfs. This enclosed mass is quite insensitive to the total virial mass of the system. The same upper limit applies to other simulations, like NIHAO and EAGLE-CHT10, despite their rather different galaxy formation efficiencies. This suggests that it is the galaxy total stellar mass that determines when a core is formed, and not the galaxy-to-dark halo mass ratio, as argued in earlier work. This is consistent with a back-of-the-envelope estimate for a SN-induced rate of orbital diffusion. Although NewHorizon dwarfs reproduce the observed diversity of rotation curves better than other simulations, there are significant differences in the gravitational importance of baryons in the inner regions of dwarfs compared to observations. These differences prevent us from concluding that cosmological simulations are currently fully able to account for the observed diversity of rotation curve shapes.
More details from the publisher
Details from ORA

On unveiling buried nuclei with JWST: A technique for hunting the most obscured galaxy nuclei from local to high redshift

Astronomy & Astrophysics EDP Sciences 696 (2025) ARTN A135

Authors:

I Garcia-Bernete, Fr Donnan, D Rigopoulou, M Pereira-Santaella, E Gonzalez-Alfonso, N Thatte, S Aalto, S Konig, M Maksymowicz-Maciata, Mw R Smith, J-S Huang, Ge Magdis, Pf Roche, J Devriendt, A., Slyz

Abstract:

We analyze JWST NIRSpec+MIRI/MRS observations of the infrared (IR) polycyclic aromatic hydrocarbon (PAH) features in the central regions (a at 6 μm; a 440 pc depending on the source) of local luminous IR galaxies. In this work, we examine the effect of nuclear obscuration on the PAH features of deeply obscured nuclei, predominantly found in local luminous IR galaxies, and we compare these nuclei with astar-forming regions. We extend previous work to include shorter wavelength PAH ratios now available with the NIRSpec+MIRI/MRS spectral range. We introduce a new diagnostic diagram for selecting deeply obscured nuclei based on the 3.3 and 6.2 μm PAH features and/or mid-IR continuum ratios at a3 and 5 μm. We find that the PAH equivalent width ratio of the brightest PAH features at shorter wavelengths (at 3.3 and 6.2 μm) is impacted by nuclear obscuration. Although the sample of luminous IR galaxies used in this analysis is relatively small, we find that sources exhibiting a high silicate absorption feature cluster tightly in a specific region of the diagram, whereas star-forming regions experiencing lower extinction levels occupy a different area in the diagram. This demonstrates the potential of this technique to identify buried nuclei. To leverage the excellent sensitivity of the MIRI imager on board JWST, we extend our method of identifying deeply obscured nuclei at higher redshifts using a selection of MIRI filters. Specifically, the combination of various MIRI JWST filters enables the identification of buried sources beyond the local Universe and up to za 3, where other commonly used obscuration tracers such as the 9.7 μm silicate band, are out of the spectral range of MRS. Our results pave the way for identifying distant deeply obscured nuclei with JWST.
More details from the publisher
More details

Inferring the ionizing photon contributions of high-redshift galaxies to reionization with JWST NIRCam photometry

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) (2025) staf126

Authors:

Nicholas Choustikov, Richard Stiskalek, Aayush Saxena, Harley Katz, Julien Devriendt, Adrianne Slyz
More details from the publisher
More details

Impact of star formation models on the growth of simulated galaxies at high redshifts

Astronomy & Astrophysics EDP Sciences (2024)

Authors:

Cheonsu Kang, Taysun Kimm, Daniel Han, Harley Katz, Julien Devriendt, Adrianne Slyz, Romain Teyssier
More details from the publisher
More details

Pagination

  • Current page 1
  • Page 2
  • Page 3
  • Page 4
  • Page 5
  • Page 6
  • Page 7
  • Page 8
  • Page 9
  • …
  • Next page Next
  • Last page Last

Footer Menu

  • Contact us
  • Giving to the Dept of Physics
  • Work with us
  • Media

User account menu

  • Log in

Follow us

FIND US

Clarendon Laboratory,

Parks Road,

Oxford,

OX1 3PU

CONTACT US

Tel: +44(0)1865272200

University of Oxfrod logo Department Of Physics text logo
IOP Juno Champion logo Athena Swan Silver Award logo

© University of Oxford - Department of Physics

Cookies | Privacy policy | Accessibility statement

Built by: Versantus

  • Home
  • Research
  • Study
  • Engage
  • Our people
  • News & Comment
  • Events
  • Our facilities & services
  • About us
  • Current students
  • Staff intranet