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Observations of the Disk/Jet Coupling of MAXI J1820+070 During its Descent to Quiescence
A. W. Shaw, R. M. Plotkin, J. C. A. Miller-Jones +8
Black hole X-ray binaries in the quiescent state (Eddington ratios typically 10) display softer X-ray spectra (photon indices ) compared to higher-luminosi…
HIRES, the high-resolution spectrograph for the ELT
Alessandro Marconi, Manuel Abreu, Vardan Adibekyan +99
HIRES will be the high-resolution spectrograph of the European Extremely Large Telescope at optical and near-infrared wavelengths. It consists of three fibre-fed spectrographs prov…
Extended X-ray emission from the z=4.26 radio galaxy 4C 63.20
Kate Napier, Adi Foord, Elena Gallo +5
We report on deep Chandra X-ray Telescope imaging observations of 4C 63.20, one of the few known radio galaxies at z>3.5. The X-ray counterpart is resolved into a core plus two off…
Ultraviolet and X-ray Properties of Coma's Ultra-Diffuse Galaxies
Chris H. Lee, Edmund Hodges-Kluck, Elena Gallo
Many ultra-diffuse galaxies (UDGs) have been discovered in the Coma cluster, and there is evidence that some, notably Dragonfly 44, have Milky Way-like dynamical masses despite dwa…
Nuclear X-ray Activity in Low-Surface-Brightness Galaxies: Prospects for Constraining the Local Black Hole Occupation Fraction with a Chandra Successor Mission
Edmund Hodges-Kluck, Elena Gallo, Anil Seth +2
About half of nearby galaxies have a central surface brightness >1 magnitude below that of the sky. The overall properties of these low-surface-brightness galaxies (LSBGs) remain u…
A Coupled Analysis of Atmospheric Mass Loss and Tidal Evolution in XUV Irradiated Exoplanets: the TRAPPIST-1 Case Study
Juliette Becker, Elena Gallo, Edmund Hodges-Kluck +2
Exoplanets residing close to their stars can experience evolution of both their physical structures and their orbits due to the influence of their host stars. In this work, we pres…