Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Hopman, Clovis"'
Publikováno v:
ApJ, 738, 99 (2011)
The angular momentum evolution of stars close to massive black holes (MBHs) is driven by secular torques. In contrast to two-body relaxation, where interactions between stars are incoherent, the resulting resonant relaxation (RR) process is character
Externí odkaz:
http://arxiv.org/abs/1010.1535
Autor:
Hopman, Clovis, Madigan, Ann-Marie
Two-body energy exchange between stars orbiting massive black holes (MBHs) leads to the formation of a power-law density distribution n(r)~r^(-a) that diverges towards the MBH. For a single mass population, a=7/4 and the flow of stars is much less th
Externí odkaz:
http://arxiv.org/abs/1002.1220
Autor:
Hopman, Clovis
Publikováno v:
Astrophys.J.700:1933-1951,2009
We analyze the dynamical evolution of binary stars that interact with a static background of single stars in the environment of a massive black hole (MBH). All stars are considered to be single mass, Newtonian point particles. We follow the evolution
Externí odkaz:
http://arxiv.org/abs/0906.0374
Autor:
Miller, M. Coleman, Alexander, Tal, Amaro-Seoane, Pau, Barth, Aaron J., Cutler, Curt, Gair, Jonathan R., Hopman, Clovis, Merritt, David, Phinney, E. Sterl, Richstone, Douglas O.
Electromagnetic observations over the last 15 years have yielded a growing appreciation for the importance of supermassive black holes (SMBH) to the evolution of galaxies, and for the intricacies of dynamical interactions in our own Galactic center.
Externí odkaz:
http://arxiv.org/abs/0903.0285
Stars on eccentric orbits around a massive black hole (MBH) emit bursts of gravitational waves (GWs) at periapse. Such events may be directly resolvable in the Galactic centre. However, if the star does not spiral in, the emitted GWs are not resolvab
Externí odkaz:
http://arxiv.org/abs/0902.3253
Publikováno v:
Astrophys.J.698:L64-L67,2009
We analyze the distribution of stars of arbitrary mass function xi(m) around a massive black hole (MBH). Unless xi is strongly dominated by light stars, the steady-state distribution function approaches a power-law in specific energy x=-E/(m*sigma^2)
Externí odkaz:
http://arxiv.org/abs/0901.4343
Autor:
Hopman, Clovis
We study the rate at which stars spiral into a massive black hole (MBH) due to the emission of gravitational waves (GWs), as a function of the mass M of the MBH. In the context of our model, it is shown analytically that the rate approximately depend
Externí odkaz:
http://arxiv.org/abs/0901.1667
Publikováno v:
Astrophys.J.697:L44-L48,2009
We identify a new secular instability of eccentric stellar disks around supermassive black holes. We show that retrograde precession of the stellar orbits, due to the presence of a stellar cusp, induces coherent torques that amplify deviations of ind
Externí odkaz:
http://arxiv.org/abs/0812.3395
Autor:
Alexander, Tal, Hopman, Clovis
Publikováno v:
Astrophys.J.697:1861-1869,2009
We show that the mass-segregation solution for the steady state distribution of stars around a massive black hole (MBH) has two branches: the known weak segregation solution (Bahcall & Wolf 1977), and a newly discovered strong segregation solution, p
Externí odkaz:
http://arxiv.org/abs/0808.3150
Autor:
Gürkan, M. Atakan, Hopman, Clovis
Publikováno v:
Mon.Not.Roy.Astron.Soc.379:1083-1088,2007
The orbits of stars close to a massive black hole are nearly Keplerian ellipses. Such orbits exert long term torques on each other, which lead to an enhanced angular momentum relaxation known as resonant relaxation. Under certain conditions, this pro
Externí odkaz:
http://arxiv.org/abs/0704.2709