scholarly journals The Cloud-in-Cloud Problem in the Press-Schechter Formalism of Hierarchical Structure Formation

1995 ◽  
Vol 448 ◽  
pp. 1 ◽  
Author(s):  
Karsten Jedamzik
2005 ◽  
Vol 15 (4) ◽  
pp. 047506 ◽  
Author(s):  
K. Amanda Leach ◽  
Suresh Gupta ◽  
Michael D. Dickey ◽  
C. Grant Willson ◽  
Thomas P. Russell

2010 ◽  
Vol 139 (2) ◽  
pp. 545-564 ◽  
Author(s):  
S. C. Gallagher ◽  
P. R. Durrell ◽  
D. M. Elmegreen ◽  
R. Chandar ◽  
J. English ◽  
...  

2020 ◽  
Vol 498 (3) ◽  
pp. 3807-3816
Author(s):  
Charles Zivancev ◽  
Jeremiah Ostriker ◽  
Andreas H W Küpper

ABSTRACT We perform N-body simulations on some of the most massive galaxies extracted from a cosmological simulation of hierarchical structure formation with total masses in the range 1012 M⊙ < Mtot < 3 × 1013 M⊙ from 4 ≥ z ≥ 0. After galactic mergers, we track the dynamical evolution of the infalling black holes (BHs) around their host’s central BHs (CBHs). From 11 different simulations, we find that, of the 86 infalling BHs with masses >104 M⊙, 36 merge with their host’s CBH, 13 are ejected from their host galaxy, and 37 are still orbiting at z = 0. Across all galaxies, 33 BHs are kicked to a higher orbit after close interactions with the CBH binary or multiple, after which only one of them merged with their hosts. These orbiting BHs should be detectable by their anomalous (not low-mass X-ray binary) spectra. The X-ray luminosities of the orbiting massive BHs at z = 0 are in the range $10^{28}-10^{43}\, \mathrm{erg}~\mathrm{s}^{-1}$, with a currently undetectable median value of $10^{33}\, \mathrm{erg}~\mathrm{s}^{-1}$. However, the most luminous ∼5 per cent should be detectable by existing X-ray facilities.


2020 ◽  
Vol 124 (36) ◽  
pp. 19457-19466
Author(s):  
Tucker L. Murrey ◽  
Dirk Hertel ◽  
Julian Nowak ◽  
Ruth Bruker ◽  
Thorsten Limböck ◽  
...  

RSC Advances ◽  
2014 ◽  
Vol 4 (75) ◽  
pp. 39684
Author(s):  
H. Li ◽  
W. Yu ◽  
J. Xu ◽  
C. Yang ◽  
Y. Wang ◽  
...  

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1271-1274
Author(s):  
E. S. PEREIRA ◽  
O. D. MIRANDA

The hierarchical scenario of structure formation describes how objects like galaxies and galaxy clusters are formed by mergers of small objects. In this scenario, mergers of galaxies can lead to the formation of massive black hole (MBH) binary systems. On the other hand, the merger of two MBH could produce a gravitational wave signal detectable, in principle, by the Laser Interferometer Space Antenna (LISA). In the present work, we use the Press–Schechter formalism, and its extension, to describe the merger rate of haloes which contain massive black holes. Here, we do not study the gravitational wave emission of these systems. However, we present an initial study to determine the number of systems formed via mergers that could permit, in a future extension of this work, the calculation of the signature in gravitational waves of these systems.


2008 ◽  
Vol 20 (3) ◽  
pp. 409-414 ◽  
Author(s):  
E. Jahnke ◽  
N. Severin ◽  
P. Kreutzkamp ◽  
J. P. Rabe ◽  
H. Frauenrath

2015 ◽  
Author(s):  
Elena S. Dedova ◽  
Vladimir S. Shadrin ◽  
Ekaterina S. Shutilova ◽  
Sergei N. Kulkov

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