Discovery of the Onset of Rapid Accretion by a Dormant Massive Black Hole
D. N. Burrows, J. A. Kennea, G. Ghisellini, V. Mangano, B. Zhang, K. L. Page, M. Eracleous, P. Romano, T. Sakamoto, A. D. Falcone, J. P. Osborne, S. Campana, A.… 展开作者
D. N. Burrows, J. A. Kennea, G. Ghisellini, V. Mangano, B. Zhang, K. L. Page, M. Eracleous, P. Romano, T. Sakamoto, A. D. Falcone, J. P. Osborne, S. Campana, A. P. Beardmore, A. A. Breeveld, M. M. Chester, R. Corbet, S. Covino, J. R. Cummings, P. D'Avanzo, V. D'Elia, P. Esposito, P. A. Evans, D. Fugazza, J. M. Gelbord, K. Hiroi, S. T. Holland, K. Y. Huang, M. Im, G. Israel, Y. Jeon, Y. -B. Jeon, N. Kawai, H. A. Krimm, P. Mészáros, H. Negoro, N. Omodei, W. -K. Park, J. S. Perkins, M. Sugizaki, H. -I. Sung, G. Tagliaferri, E. Troja, Y. Ueda, Y. Urata, R. Usui, L. A. Antonelli, S. D. Barthelmy, G. Cusumano, P. Giommi, F. E. Marshall, A. Melandri, M. Perri, J. L. Racusin, B. Sbarufatti, M. H. Siegel, N. Gehrels
Massive black holes are believed to reside at the centres of most galaxies. They can be- come detectable by accretion of matter, either continuously from a large gas reservoir or impulsively from the tidal disruption of a passing star, and conversion of the gravitational energy of the infalling matter to light. Continuous accretion drives Active Galactic Nuclei (AGN), which are known to be variable but have never been observed to turn on or off. Tidal disruption of stars by dormant massive black holes has been inferred indirectly but the on- set of a tidal disruption event has never been observed. Here we report the first discovery of the onset of a relativistic accretion-powered jet in the new extragalactic transient, Swift J164449.3+573451. The behaviour of this new source differs from both theoretical models of tidal disruption events and observations of the jet-dominated AGN known as blazars. These differences may stem from transient effects associated with the onset of a powerful jet. Such an event in the massive black hole at the centre of our Milky Way galaxy could strongly ionize the upper atmosphere of the Earth, if beamed towards us.
Korea Astronomy and Space Science Institute (KASI)（韩国天文学与空间科学研究所）；Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences（波兰科学院尼古拉·哥白尼天文中心）；School of Computer Science and Information Engineering, Changzhou Institute of Technology（常州工学院计算机科学与信息工程学院）；Center for Astronomy and Astrophysics and Department of Physics, Fudan University（复旦大学天文与天体物理中心及物理系）；Shanghai Astronomical Observatory, Chinese Academy of Sciences（中国科学院上海天文台）；Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences（中国科学院射电天文与技术重点实验室）；University of Science and Technology（科学技术大学）；Department of Astronomy, University of Science and Technology of China（中国科学技术大学天文系）；School of Astronomy and Space Science, University of Science and Technology of China（中国科学技术大学天文与空间科学学院）；College of Physics, Guizhou University（贵州大学物理学院）；Deep Space Exploration Laboratory（深空探索实验室）；Yunnan Observatories, Chinese Academy of Sciences（中国科学院云南天文台）；State Key Laboratory of Radio Astronomy and Technology, Yunnan Observatories, Chinese Academy of Sciences（中国科学院云南天文台射电天文与技术国家重点实验室）；School of Astronomy and Space Science, Nanjing University（南京大学天文与空间科学学院）
The role of accretion efficiency, natal kicks, and angular momentum transport in the formation of the Gaia black holes
Universität Heidelberg（海德堡大学）；University of Padova（帕多瓦大学）；INAF - Osservatorio Astronomico di Padova（意大利国家天体物理研究所帕多瓦天文台）；Max-Planck-Institut für Astronomie（马克斯·普朗克天文学研究所）；Universitat de Barcelona（巴塞罗那大学）
New closed analytical solutions for geometrically thick fluid tori around black holes: Numerical evolution and the onset of the magneto-rotational instability
On the Papaloizou-Pringle instability in tidal disruption events
我们表明，紧凑，厚盘形成的潮汐中断事件可能是不稳定的非轴对称扰动形式的Papaloizou-Pringle不稳定。我们表明，这可能会导致角动量的快速重新分配，可以参数化的有效Shakura-Sunyaev $α$参数。对于最初具有弱磁场的残留物，这可能是在磁旋转不稳定性开始之前驱动质量吸积的原因。对于$10^6$ M $_{\odot}$黑洞周围的潮汐扰动，测量到的吸积率是超爱丁顿的，但在许多轨道上是不可持续的。因此，我们确定了一种方法，通过这种方法，在潮汐破裂事件中形成的环面可能会显着吸积磁旋转不稳定性建立之前。
