搜索结果: 16-30 共查到“天文学 black holes”相关记录77条 . 查询时间(0.265 秒)
Planet-sized 'virtual telescope' expands to the South Pole to observe black holes in detail
Planet-sized virtual telescope South Pole to observe black holes
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2015/4/29
B-roll of the South Pole Telescope is available from NSF's Dena Headlee, dheadlee@nsf.gov / (703) 292-7739.Astronomers building a globe-spanning virtual telescope capable of photographing the "event h...
Flip-flopping black holes spin to the end of the dance
Flip-flopping black holes spin end of the dance
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2015/4/13
When black holes tango, one massive partner spins head over heels (or in this case heels over head) until the merger is complete, said researchers at Rochester Institute of Technology in a paper publi...
Black holes don’t erase information, scientists say（图）
Black holes don’t erase information scientists say
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2015/4/13
Shred a document, and you can piece it back together. Burn a book, and you could theoretically do the same. But send information into a black hole, and it’s lost forever.That’s what some physicists ha...
Big black holes can block new stars（图）
stars Big black holes
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2014/12/1
Massive black holes spewing out radio-frequency-emitting particles at near-light speed can block formation of new stars in aging galaxies, a study has found.
Mergers and ejections of black holes in globular clusters
black hole physics globular clusters numerical Mergers ejections
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2012/2/23
We report on results of fully consistent N-body simulations of globular cluster models with N = 100 000 members containing neutron stars and black holes. Using the improved `algorithmic regularization...
Neutral and charged matter in equilibrium with black holes
Neutral charged matter equilibrium black holes
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2011/10/14
We study the conditions of a possible static equilibrium between spherically symmetric, electrically charged or neutral black holes and ambient matter. The following kinds of matter are considered: (1...
Static and spherically symmetric black holes in $f(R)$ theories
Static spherically symmetric black holes theories
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2011/10/14
We study some features of static and spherically symmetric solutions (SSS) with a horizon in $f(R)$ theories of gravitation by means of a near-horizon analysis. A necessary condition for an $f(R)$ the...
Unification models with reheating via Primordial Black Holes
Unification models reheating via Primordial Black Holes
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2011/10/20
We study the possibility of reheating the universe through the evaporation of Primordial Black Holes created at the end of inflation. This is shown to allow for the unification of inflation and dark m...
Effective temperature for black holes
Black hole entropy Hawking radiation eff ective temperature
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2011/10/14
The physical interpretation of black hole's quasinormal modes is fundamental for realizing unitary quantum gravity theory as black holes are considered theoretical laboratories for testing models of s...
The mass function of black holes at 1comparison of models with observations
mass function black holes comparison models observations
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2011/10/19
In this paper, we compare the observationally derived black hole mass function (BHMF) of luminous broad-line quasars (BLQSOs) at 1he Sloan Digital Sky Survey (SDSS) presented in Kel...
The Host Galaxies of Low-mass Black Holes
Host Galaxies Low-mass Black Holes
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2011/10/12
Using HST observations of 147 host galaxies of low-mass black holes (BHs), we systematically study the structures and scaling relations of these active galaxies. Our sample is selected to have central...
Black Hole Mass and Bulge Luminosity for Low-mass Black Holes
Black Hole Mass Bulge Luminosity Low-mass Black Holes
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2011/10/12
We study the scaling between bulge magnitude and central black hole (BH) mass in galaxies with virial BH masses < 10^6 solar mass. Based on careful image decomposition of a snapshot Hubble Space Teles...
Acceleration of particles by rotating black holes: near-horizon geometry and kinematics
Acceleration particles rotating black holes: near-horizon geometry kinematics
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2011/10/14
Nowadays, the effect of infinite energy in the centre of mass frame due to near-horizon collisions attracts much attention.We show generality of the effect combining two seemingly completely different...
Genericity of black holes and naked singularities in gravitational collapse
Gravitational collapse black holes naked singularity
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2011/10/14
We investigate here the genericity and stability aspects for naked singularities and black holes that arise as the final states for a complete gravitational collapse of a spherical massive matter clou...
A Lower Limit on the Halo Mass to form Supermassive Black Holes
black hole physics — hydrodynamics— galaxies: nuclei—accretion:accretion discs
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2011/10/11
We consider a scenario where supermassive black holes form through direct accumulation of gas at the centre of proto-galaxies. In the first stage, the accumulated gas forms a super-massive star whose ...