ar X iv : a st ro - p h / 03 10 44 6 v 1 1 6 O ct 2 00 3 A Dynamical Model for Hot Gas in the Galactic Center
نویسنده
چکیده
Winds from massive stars supply ≈ 10 −3 M ⊙ yr −1 of gas to the central parsec of the Galactic Center. Spherically symmetric hydrodynamic calculations show that ≈ 1% of this gas, or ≈ 10 −5 M ⊙ yr −1 , flows in towards the central massive black hole Sgr A*; the remaining gas, ≈ 10 −3 M ⊙ yr −1 , is thermally driven out of the central star cluster in a wind. This dynamical model accounts for the level of diffuse X-ray emission observed in the Galactic Center by Chandra and the extended X-ray source coincident with Sgr A*; the latter is a direct signature of gas being gravitational captured by the black hole.
منابع مشابه
ar X iv : a st ro - p h / 06 10 95 0 v 1 3 1 O ct 2 00 6 Formation of cold molecular filaments in cooling flow clusters
New CO observations at the center of cooling flow in Perseus cluster [4] show a clear correlation of the molecular gas with the previously detected H-α filaments [1]. In this poster, we present high resolution multi-phase simulations of the Perseus Cluster, taking into account the AGN feedback in form of hot buoyant bubbles. These simulations show that significant amount of gas can cool far fro...
متن کاملar X iv : a st ro - p h / 06 10 24 6 v 1 9 O ct 2 00 6 Special Features of Galactic Dynamics
متن کامل
ar X iv : a st ro - p h / 06 10 94 5 v 1 3 1 O ct 2 00 6 First results of galactic observations with MAGIC
During its first cycle, the MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescope was performing an observational campaign covering a total of about 250 hours on galactic sources. Here we review the results for the very high energy (> 100 GeV) γ-ray emission from some of those sources.
متن کاملar X iv : a st ro - p h / 03 11 08 9 v 1 4 N ov 2 00 3 Hot Gas in the Local Group and Low - Redshift Intergalactic Medium
There is increasing observational evidence that hot, highly ionized interstellar and intergalactic gas plays a significant role in the evolution of galaxies in the local universe. The primary spectral diagnostics of the warm-hot interstellar/intergalactic medium are ultraviolet and X-ray absorption lines of Ovi and Ovii. In this paper, I summarize some of the recent highlights of spectroscopic ...
متن کامل