We have studied, in a series of papers, the properties of the $M_{\bullet}$ versus $M_{G}σ^2$ relation and we have found that it is useful to describe the evolution of galaxies in the same way as the HR diagram does for stars and to predict the masses of Supermassive Black Holes that are difficult to be guessed using other scaling relations. In this paper, analyzing five samples of galaxies, we find that this relation has intrinsic scatter similar to the $M_{\bullet} - σ$, but follows the theoretical models much better than the $M_{\bullet} - σ$. Furthermore, we analyze the role of the bulge mass in the behavior of $M_{\bullet}$ versus $M_{G}σ^2$ relation because the difference with the $M_{\bullet} - σ$ is often determined by the choice of the right sample of galactic masses.
Baryonic mass budgets in the central regions of the Bullet Cluster and their consistency with strong lensing in MOND
University of Bonn(波恩大学);Institute for Advanced Studies in Basic Sciences (IASBS)(基础科学高等研究所);Institute for Research in Fundamental Sciences (IPM)(基础科学研究院);University of Portsmouth(朴茨茅斯大学);Yonsei University(延世大学)
Extracting the Possible Intrinsic Relation between Radiative Efficiency and Mass of QSOs: a Maximum Likelihood Method and its Application to the SDSS DR7 QSOs
JWST CEERS & JADES Active Galaxies at z = 4-7 Violate the Local $M_\bullet-M_\star$ Relation at $>3σ$: Implications for Low-Mass Black Holes and Seeding Models
Mapping dark matter in the Bullet Cluster using JWST imaging and spectroscopy
Department of Physics and Astronomy, University of California Davis(加州大学戴维斯分校物理与天文学系);Kapteyn Astronomical Institute, University of Groningen(格罗宁根大学卡普坦天文研究所);Kavli Institute for Cosmology, University of Cambridge(剑桥大学卡弗里宇宙学研究所);Cavendish Laboratory - Astrophysics Group, University of Cambridge(剑桥大学卡文迪许实验室天体物理组);National Research Council of Canada, Herzberg Astronomy & Astrophysics Research Centre(加拿大国家研究委员会赫茨伯格天文学与天体物理学研究中心);Department of Physics and Astronomy, York University(约克大学物理与天文学系);David A. Dunlap Department of Astronomy and Astrophysics, University of Toronto(多伦多大学大卫·A·邓纳普天文学与天体物理学系)
A stellar dynamical mass measurement of an inactive black hole at redshift 2
Carnegie Institution for Science(卡内基科学机构);Università di Bologna(博洛尼亚大学);University College London(伦敦大学学院);University of Southern California(南加州大学);Princeton University(普林斯顿大学);George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy(乔治·P·和辛西娅·伍兹基础物理与天文学研究所);Texas A&M University(德克萨斯农工大学);Technical University of Munich(慕尼黑工业大学);Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理学研究所);Università degli Studi di Milano(米兰大学);Università degli Studi di Ferrara(费拉拉大学)
利用先进的数字巡天技术,更新了孤立星系表(KIG)中晚型星系的分类。我们对959个KIG星系的伴星进行了搜索,发现141个邻居与111个KIG星系相关,相互投影距离小于330 kpc,径向速度差不超过500 km s $^{-1}$。伴星的典型光度比主星系的光度弱一个数量级以上。考虑这些小的伴星作为测试粒子,沿开普勒轨道以$e\simeq0.7$的偏心率围绕KIG星系运动,我们估计了螺旋KIG星系的总(轨道)质量。它们的平均轨道质量与$K$带光度比,$(20.9\pm3.1) M_{\odot}/L_{\odot}$,与附近的银河系、M31和M81型大质量螺旋的相应值非常一致。孤立的盘状星系的总质量与恒星质量之比平均比孤立的膨胀状星系小2-3倍。
Stellar-mass black holes in young massive and open stellar clusters IV: updated stellar-evolutionary and black hole spin models and comparisons with the LIGO-Virgo O1/O2 merger-event data
我提出了一套长期的,直接的,相对论性的多体计算模型密集的星团与最新的恒星演化,超新星(SN),和残留的自然踢模型,包括对不稳定性和脉动对不稳定性超新星(PSN和PPSN),使用更新版本的NBODY 7 N体模拟程序。N体模型还包括基于恒星演化的黑洞诞生自旋和基于数值相对论的双黑洞合并处理。这些,第一次在一个直接的N体模拟,允许第二代BBH合并。这套65个演化模型的初始质量为$10^4M_\odot-10^5M_\odot$,大小为1 pc-3 pc,金属丰度为$0.0001-0.02$,大质量恒星位于原始双星中,它们代表年轻大质量星团(YMC)和中等质量的疏散星团(OC)。这样的模型产生动态配对的BBH合并,与观测到的质量,质量比,有效自旋参数和LVC O 1/O2合并事件的最终自旋很好地吻合,前提是BH出生时具有低自旋或没有自旋,但在经历BBH合并或物质吸积后自旋上升。特别是,明显较高的质量,有效自旋参数,GW 170729并合事件的末自旋和O3事件GW 190412的质量不对称性也被自然再现。计算的模型产生大量的,$\sim100M_\odot$ BBH合并与初级质量内的“PSN差距”,也产生合并涉及残余的“质量差距”。他们还认为,YMC和OC产生持久的,LISA可检测到的本地宇宙GW源。这样的星系团也能够产生古怪的LIGO-Virgo合并。