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Black holes & neutron stars in nearby galaxies
Nearby galaxy surveys have long classified X-ray binaries (XRBs) by the mass category of their donor stars (high-mass and low-mass). The NuSTAR observatory, which provides... -
SEAMBHs IX. 10 new H{beta} light curves
As one paper in a series reporting on a large reverberation mapping campaign of super-Eddington accreting massive black holes (SEAMBHs) in active galactic nuclei (AGNs), we... -
Spectral analysis of low-mass X-ray binaries
A recent study of a small sample of X-ray binaries (XRBs) suggests a significant softening of spectra of neutron star (NS) binaries as compared to black hole (BH) binaries in... -
Luminosity functions of tidal disruption flares
The tidal disruption of a star by a massive black hole is expected to yield a luminous flare of thermal emission. About two dozen of these stellar tidal disruption flares (TDFs)... -
Mass-to-light ratios in low-mass early-type gal.
We present dynamical measurements of the central mass-to-light ratio (M/L) of a sample of 27 low-mass early-type ATLAS^3D^ galaxies. We consider all ATLAS^3D^ galaxies with... -
Random forests method to discover high-redshift QSOs
We present a method of selecting quasars up to redshift ~6 with random forests, a supervised machine-learning method, applied to Pan-STARRS1 and WISE data. We find that, thanks... -
MACS J1447.4+0827 multiwavelength study
Clusters of galaxies are outstanding laboratories for understanding the physics of supermassive black hole (SMBH) feedback. Here we present the first Chandra, Karl G. Jansky... -
Xinglong optical spectra of UGC3223 in 4 epochs
The discovery of spectral type transition of active galactic nuclei (AGNs), the so-called "changing-look" (CL) phenomenon, challenges the widely accepted AGN paradigm, not only... -
The blueshift of the C IV broad emission line in QSOs
For the sample from Ge et al. (2016MNRAS.462..966G) of 87 low-z Palomar-Green quasi-stellar objects (QSOs) and 130 high-z QSOs (0<z<5) with H{beta}-based single-epoch... -
The internal Faraday screen of Sagittarius A*
We report on 85-101 GHz light curves of the Galactic Center supermassive black hole, Sagittarius A (Sgr A), observed in April 2017 with the Atacama Large... -
Black hole mergers with Obelisk simulation
Massive black hole (BH) mergers will be key targets of future gravitational wave and electromagnetic observational facilities. In order to constrain BH evolution with the... -
Light-curve models of black hole
In the new era of gravitational wave (GW) and multi-messenger astrophysics, the detection of a GW signal from the coalescence of a black hole - neutron star (BHNS) binary... -
Gaia DR3 4373465352415301632 chemical abundances
We describe the discovery of a solar neighborhood (d=468pc) binary system with a main-sequence sunlike star and a massive noninteracting black hole candidate. The spectral... -
Black hole binaries quasi-periodic oscillations
We present a systematic study of the orbital inclination effects on black hole transients fast time-variability properties. We have considered all the black hole binaries that... -
Reverberation mapping & opt. spectra data of AGNs
The radius-luminosity (R_H{beta}-L_5100) relationship of active galactic nuclei (AGNs) established by the reverberation mapping (RM) observations has been widely used as a... -
The Megamaser Cosmology Project. X.
We present high-resolution (submas) Very Long Baseline Interferometry maps of nuclear H_2_O megamasers for seven galaxies. In UGC 6093, the well-aligned systemic masers and...