منابع مشابه
Constraints on the Stellar Mass Function from Stellar Dynamics at the Galactic Center
We consider the dynamical evolution of a disk of stars orbiting a central black hole. In particular, we focus on the effect of the stellar mass function on the evolution of the disk, using both analytic arguments and numerical simulations. We apply our model to the ring of massive stars at ≃ 0.1pc from the Galactic Center, assuming that the stars formed in a cold, circular disk, and find that o...
متن کاملThe Stellar Initial Mass Function in the Galactic Center
Massive stars define the upper limits of the star formation process, dominate the energetics of their local environs, and significantly affect the chemical evolution of galaxies. Their role in starburst galaxies and the early Universe is likely to be important, but we still do not know the maximum mass that a star can possess, i.e.“the upper mass cutoff.” I will discuss results from a program t...
متن کاملThe Galactic Center stellar cluster : The central arcsecond ∗
With 10 years of high-resolution imaging data now available on the stellar cluster in the Galactic Center, we analyze the dynamics of the stars at projected distances ≤ 1.2 ′′ from the central black hole candidate Sagittarius A* (Sgr A*). We find evidence for radial anisotropy of the cluster of stars surrounding Sgr A*. We confirm/find accelerated motion for 6 stars, with 4 stars having passed ...
متن کاملStellar Collisions and Mergers in the Galactic Center
Stars are most likely to merge or collide in regions of the highest stellar densities, and our own Galactic Center contains many stars packed into a relatively small volume – even the ambient stellar number density in the central 50 pc is quite high, ∼ 10 stars pc. More striking, the three compact young clusters in this region have central densities as high as 10 stars pc. We discuss these extr...
متن کاملSharing the Data Center Network
While today’s data centers are multiplexed across many non-cooperating applications, they lack effective means to share their network. Relying on TCP’s congestion control, as we show from experiments in production data centers, opens up the network to denial of service attacks and performance interference. We present Seawall, a network bandwidth allocation scheme that divides network capacity b...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1982
ISSN: 0252-9211
DOI: 10.1017/s0252921100082580