Megumi Shidatsu

TL;DR: The optical spectra of extragalactic black holes emit X-rays with intensities that are thousands of times greater than those from black holes within our Galaxy as discussed by the authors, which suggests these different sources may be more similar than once thought.

TL;DR: The data show that optical oscillations on timescales of 100 seconds to 2.5 hours can occur at mass-accretion rates more than ten times lower than previously thought, suggesting that the accretion rate is not the critical parameter for inducing inner-disk instabilities.

TL;DR: The Hitomi (ASTRO-H) mission as discussed by the authors is the 6 Japanese x-ray astronomy satellite developed by a large international collaboration, including Japan, USA, Canada, and Europe.

TL;DR: In this paper, the authors examined the atmospheric gas motions within the central 100kpc of the Perseus cluster using observations obtained with the Hitomi satellite and found that the line-of-sight velocity dispersion of the hot gas is remarkably low and mostly uniform.

TL;DR: In this article, the authors examined the atmospheric gas motions within the central 100 kpc of the Perseus cluster using observations obtained with the Hitomi satellite and found that the line-of-sight velocity dispersion of the hot gas is remarkably low and mostly uniform.