Ryan Troy Urquhart

Specialist, Department of Physics & Astronomy
Location: 4208 Biomed Phys Sci


My research focuses on accreting compact objects. I primarily use X-ray and radio observations to study black holes and neutron stars in globular clusters in addition to low-mass central black holes in dwarf galaxies. I earned my PhD in 2019 from the International Centre for Radio Astronomy Research (ICRAR), Curtin University, where I was studying rapidly-accreting compact objects known as ultraluminous X-ray sources (ULXs).

# Select Publications:

* [X-Ray and Radio Observations of Central Black Holes in Nearby Low-mass Early-type Galaxies: Preliminary Evidence for Low Eddington Fractions](https://ui.adsabs.harvard.edu/abs/2022ApJ...940..111U/abstract). Urquhart, R., McDermott, L.I., Strader, J., Seth, A., Chomiuk, L.,  Neumayer, N., Nguyen, D.D. & Tremou, E. 2022, ApJ, 940, 111
* [The MAVERIC Survey: New Compact Binaries Revealed by Deep Radio Continuum Observations of the Galactic Globular Cluster Terzan 5](https://ui.adsabs.harvard.edu/abs/2020ApJ...904..147U/abstract). Urquhart, R., Bahramian, A., Strader, J., Chomiuk, L.,  Ransom, S.M., Wang, Y., Heinke, C., Tudor, V., Miller-Jones, J.C.A., Tetarenko, A.J., Maccarone, T.J., Sivakoff, G.R., Shishkovsky, L., Swihart, S.J. & Tremou, E. 2020, ApJ, 904, 147,
* [Multiband counterparts of two eclipsing ultraluminous X-ray sources in M 51](https://ui.adsabs.harvard.edu/abs/2018MNRAS.475.3561U). Urquhart, R., Soria, R., Johnston, H.M., Pakull, M.W., Motch, C., Schwope, A., Miller-Jones, J.C.A., & Anderson, G.E. 2018, Monthly Notices of the Royal Astronomical Society, 475, 3561
* [Optically thick outflows in ultraluminous supersoft sources](https://ui.adsabs.harvard.edu/abs/2016MNRAS.456.1859U). Urquhart, R. & Soria, R. 2016, Monthly Notices of the Royal Astronomical Society, 456, 1859