715 citations · 4.6k across the 125 of their papers we have counts for
65 papers · 1 filter
JWST/MIRI Spectroscopy of the Quiescent Black Hole X-ray Binary XTE J1118+480: Constraints on Jet and Circumbinary Dust Contributions to the Mid-infrared Emission
Zihao Zuo, Elena Gallo, Nuria Calvet +9
We report on JWST/MIRI low-resolution spectroscopy (-m) and imaging (-m) of the black hole X-ray binary XTE~J1118+480 in quiescence, at an X-ray luminosity nine…
A Multiwavelength Assessment Disfavoring the X-ray Binary Origin of He III Regions in Metal-Poor Star-Forming Dwarf Galaxies
Ivan Altunin, Christopher Ellis, Richard M. Plotkin +9
Recent observations of metal-poor, star-forming dwarf galaxies reveal He III regions, traced by nebular He II 4686 emission that require a strong source of extreme-ultraviolet (EUV…
XRISM Spectroscopy of the Stellar-mass Black Hole GRS 1915+105
Jon M. Miller, Liyi Gu, John Raymond +11
GRS 1915105 was the stellar-mass black hole that best reproduced key phenomena that are also observed in Type-1 active galactic nuclei. In recent years, however, it has evolved…
Multi-layered Fast Wind observed in XMM-Newton snapshot of Seyfert 1 Markarian 877
Xin Xiang, Jon M. Miller, Ehud Behar +4
Ultra Fast Outflows (UFOs) are powerful, highly ionized winds launched from the innermost regions of Active Galactic Nuclei (AGNs), reaching velocities of 0.03 -- 0.3 c and playing…
The peculiar hard state behaviour of the black hole X-ray binary Swift J1727.81613
A. K. Hughes, F. Carotenuto, T. D. Russell +37
Tracking the correlation between radio and X-ray luminosities during black hole X-ray binary outbursts is a key diagnostic of the coupling between accretion inflows (traced by X-ra…
Gone with the Wind: JWST-MIRI Unveils a Strong Outflow from the Quiescent Stellar-Mass Black Hole A0620-00
Zihao Zuo, Gabriele Cugno, Joseph Michail +15
We present new observations of the black hole X-ray binary A0620-00 using the Mid-Infrared Instrument on the James Webb Space Telescope, during a state where the X-ray luminosity i…
The black hole occupation fraction of local dwarf galaxies with AXIS
Elena Gallo, Edmund Hodges-Kluck, Tommaso Treu +7
The fraction of local dwarf galaxies that hosts massive black holes is arguably the cleanest diagnostic of the dominant seed formation mechanism of today's supermassive black holes…
Chasing the break: Tracing the full evolution of a black hole X-ray binary jet with multi-wavelength spectral modeling
Constanza Echiburú-Trujillo, Alexandra J. Tetarenko, Daryl Haggard +35
Black hole X-ray binaries (BH XRBs) are ideal targets to study the connection between accretion inflow and jet outflow. Here we present quasi-simultaneous, multi-wavelength observa…
The X-ray Binary-Star Cluster Connection in Late-Type Galaxies
Qiana Hunt, Rupali Chandar, Elena Gallo +3
We conduct one of the largest systematic investigations of bright X-ray binaries (XRBs) in both young star clusters and ancient globular clusters (GCs) using a sample of six nearby…
Multiwavelength Scrutiny of X-ray Sources in Dwarf Galaxies: ULXs versus AGN
Erica Thygesen, Richard M. Plotkin, Roberto Soria +10
Owing to their quiet evolutionary histories, nearby dwarf galaxies (stellar masses ) have the potential to teach us about the mechanism(s) t…
The flickering radio jet from the quiescent black hole X-ray binary A0620-00
Donna L. dePolo, Richard M. Plotkin, James C. A. Miller-Jones +5
Weakly accreting black hole X-ray binaries launch compact radio jets that persist even in the quiescent spectral state, at X-ray luminosities <1e-5 of the Eddington luminosity. How…
Calibrating X-ray binary luminosity functions via optical reconnaissance II. The high-mass XLF and globular cluster population of X-ray binaries in the low star-forming spiral M81
Qiana Hunt, Elena Gallo, Rupali Chandar +2
We characterize the optical counterparts to the compact X-ray source population within the nearby spiral galaxy M81 using multi-band Hubble Space Telescope (HST) imaging data. By c…
Subarcsecond view on the high-redshift blazar GB 1508+5714 by the International LOFAR Telescope
A. Kappes, P. R. Burd, M. Kadler +14
Studies of the most distant AGNs allow us to test our current understanding of the physics present in radio-jetted AGNs across a range of environments. The decrease in apparent lum…
Massive black hole formation in dense stellar environments: Enhanced X-ray detection rates in high velocity dispersion nuclear star clusters
Vivienne F. Baldassare, Nicholas C. Stone, Adi Foord +2
We analyze Chandra X-ray Observatory imaging of 108 galaxies hosting nuclear star clusters (NSCs) to search for signatures of massive black holes (BHs). NSCs are extremely dense st…
A new radio census of neutron star X-ray binaries
J. van den Eijnden, N. Degenaar, T. D. Russell +16
We report new radio observations of a sample of thirty-six neutron star (NS) X-ray binaries, more than doubling the sample in the literature observed at current-day sensitivities.…
Proof of CMB-driven X-ray brightening of high-z radio galaxies
Edmund Hodges-Kluck, Elena Gallo, Gabriele Ghisellini +3
We present a definitive assessment of the role of Inverse Compton scattering of Cosmic Microwave Background photons (IC/CMB) in the context of radio galaxies. Owing to the steep in…
Calibrating X-ray binary luminosity functions via optical reconnaissance I. The case of M83
Qiana Hunt, Elena Gallo, Rupali Chandar +4
Building on recent work by Chandar et al. (2020), we construct X-ray luminosity functions (XLFs) for different classes of X-ray binary (XRB) donors in the nearby star-forming galax…
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…
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…
Relativistic X-ray jets from the black hole X-ray binary MAXI J1820+070
Mathilde Espinasse, Stéphane Corbel, Philip Kaaret +14
The black hole MAXI J1820+070 was discovered during its 2018 outburst and was extensively monitored across the electromagnetic spectrum. Following the detection of relativistic rad…
An extremely powerful long-lived superluminal ejection from the black hole MAXI J1820+070
J. S. Bright, R. P. Fender, S. E. Motta +25
Black holes in binary systems execute patterns of outburst activity where two characteristic X-ray states are associated with different behaviours observed at radio wavelengths. Th…
GS 2000+25: The Least Luminous Black Hole X-ray Binary
J. Rodriguez, R. Urquhart, R. M. Plotkin +6
Little is known about the properties of the accretion flows and jets of the lowest-luminosity quiescent black holes. We report new, strictly simultaneous radio and X-ray observatio…
The nature of the broadband X-ray variability in the dwarf Seyfert galaxy NGC 4395
E. S. Kammoun, E. Nardini, A. Zoghbi +14
We present a flux-resolved X-ray analysis of the dwarf Seyfert 1.8 galaxy NGC 4395, based on three archival and one archival observations. The source is known…
Exploring the local black hole mass function below solar masses
Elena Gallo, Alberto Sesana
The local black hole mass function (BHMF) is of great interest to a variety of astrophysical problems, ranging from black hole binary merger rates to an indirect census of the domi…