منابع مشابه
Black holes in the milky way galaxy.
Extremely strong observational evidence has recently been found for the presence of black holes orbiting a few relatively normal stars in our Milky Way Galaxy and also at the centers of some galaxies. The former generally have masses of 4-16 times the mass of the sun, whereas the latter are "supermassive black holes" with millions to billions of solar masses. The evidence for a supermassive bla...
متن کاملX-Rays from Isolated Black Holes in the Milky Way
Galactic stellar-population-synthesis models, chemical-enrichment models, and longduration Bulge microlensing events indicate about Ntot = 10 − 10 stellar-mass black holes reside in our Galaxy. We study X-ray emission from accretion from the interstellar medium on to isolated black holes. Although isolated black holes may be fewer in number than neutron stars, NNS ∼ 10, their higher masses, 〈M〉...
متن کاملGalaxy Formation: Clues from the Milky Way
Stellar Populations are the fossil record of Galactic evolution. Interpretation of this record in the Local Group allows one to determine reliably the dominant physics controlling the evolution of those galaxies which are typical of the luminosity in the Universe, and is an essential prerequisite to understanding necessarily limited data at high redshifts. In our Galaxy, the key issues are the ...
متن کاملChemodynamical Simulations of the Milky Way Galaxy
We present chemodynamical simulations of a Milky Way-type galaxy using a selfconsistent hydrodynamical code that includes supernova feedback and chemical enrichment, and predict the spatial distribution of elements from Oxygen to Zinc. In the simulated galaxy, the kinematical and chemical properties of the bulge, disk, and halo are consistent with the observations. The bulge formed from the ass...
متن کامل- 03918 - 6 - Revealing the Heart of the Galaxy : The Milky Way and Its Black Hole
Nothing can be more spectacular than the nocturnal moonless sky, far from big city lights and haze. This is especially true in the summer, or so it seemed to me in the small Texas town of my childhood. Even in that soupy semitropical climate near the Gulf of Mexico there were nights when the sky was brilliant with stars of all brightness and colors. It appeared to me not as a flat canopy but as...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1999
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.96.18.9993