搜索结果: 1-15 共查到“理学 Merger”相关记录32条 . 查询时间(0.062 秒)
Radio Observations Point to Likely Explanation for Neutron-Star Merger Phenomena（图）
Radio Observations Point Likely Explanation Neutron-Star Merger
2018/1/10
Three months of observations with the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) have allowed astronomers to zero in on the most likely explanation for what happened in the af...
NSF statement on latest LIGO-Virgo detection of binary black hole merger（图）
NSF latest LIGO-Virgo binary black hole merger
2017/12/19
Scientists supported by the National Science Foundation (NSF) recently announced the detection of the merger of two relatively "light" black holes, 7 and 12 times the mass of the sun, respectively, at...
Statement from National Science Foundation (NSF) Director France Córdova regarding news that researchers at the Laser Interferometer Gravitational-wave Observatory (LIGO) detected gravitational waves ...
Pulsing Light May Indicate Supermassive Black Hole Merger（图）
Pulsing Light Supermassive Black Hole
2015/4/29
As two galaxies enter the final stages of merging, scientists have theorized that the galaxies’ supermassive black holes will form a “binary,” or two black holes in such close orbit they are gravitati...
A Deep Radio Survey of Abell 2125. II. Accelerated Galaxy Evolution during a Cluster-Cluster Merger
Abell galaxies
2014/12/24
Using our extensive radio, optical, near-IR, and X-ray imaging and spectroscopy, we consider the reason for the unusually large number of radio-detected galaxies, mostly found outside the cluster core...
Galaxy merger statistics and inferred bulge-to-disk ratios in cosmological SPH simulations
formation spiral elliptical
2014/12/24
We construct merger trees for galaxies identified in a cosmological hydrodynamic simulation and use them to characterize predicted merger rates as a function of redshift, galaxy mass, and merger mass ...
The physical scale of the far-infrared emission in the most luminous submillimetre galaxies – II. Evidence for merger-driven star formation
interferometers interactions
2014/12/22
We present high-resolution 345-GHz interferometric observations of two extremely luminous (Lir≳ 1013 L⊙), submillimetre-selected galaxies (SMGs) in the Cosmic Evolution Survey (COSMOS) field wit...
ALMA finds best evidence yet for galactic merger in distant protocluster（图）
ALMA galactic merger distant protocluster
2014/12/1
Nestled among a triplet of young galaxies more than 12.5 billion light-years away is a cosmic powerhouse: a galaxy that is producing stars nearly 1,000 times faster than our own Milky Way. This energe...
Double Compact Objects I: The Significance Of The Common Envelope On Merger Rates
Double Compact Objects Significance Common Envelope Merger Rates
2012/2/23
The development of gravitational wave observatories (Advanced LIGO/Virgo, Einstein Telescope) is proceeding apace, and the direct detection of gravitational waves should be imminent. The last decade o...
Merger induced scatter and bias in the cluster mass - Sunyaev-Zeldovich effect scaling relation
cosmology: large-scale structure of Universe, galaxies: clusters: general, meth- ods: N-body simulations
2011/10/20
We examine sources of scatter in scaling relations between galaxy cluster mass and thermal Sunyaev-Zeldovich (SZ) effect using cluster samples extracted from cosmological hydrodynamical simulations. O...
A WFC3 study of globular clusters in NGC 4150 - an early-type minor merger
galaxies: star clusters - galaxies: individual: NGC 4150 - galaxies: ellipti-cal and lenticular, cD - galaxies: evolution galaxies: interactions - ultraviolet: galaxies
2011/10/19
We combine near-ultraviolet (NUV; 2250 {\AA}) and optical (U, B, V, I) imaging from the Wide Field Camera 3 (WFC3), on board the Hubble Space Telescope (HST), to study the globular cluster (GC) popula...
The fate of Cyg X-1: an empirical limit on BH-NS merger rate
Cyg X-1:empirical limit BH-NS merger rate
2011/10/12
The recent distance determination allowed precise estimation of the orbital parameters of Cyg X-1, which contains a massive 14.8 Msun BH with a 19.2 Msun O star companion. This system appears to be th...
Convergence of Galaxy Properties with Merger Tree Temporal Resolution
galaxies cosmology galactic structure galaxy evolution galaxy formation
2011/10/12
Dark matter halo merger trees are now routinely extracted from cosmological simulations of structure formation. These trees are frequently used as inputs to semi-analytic models of galaxy formation to...
Can a Satellite Galaxy Merger Explain the Active Past of the Galactic Center?
Satellite Galaxy Merger Explain Active Past Galactic Center
2011/10/9
Observations of the Galactic Center (GC) have accumulated a multitude of "forensic" evidence indicating that several million years ago the center of the Milky Way galaxy was teaming with starforming a...
Predicting the Merger Fraction of Lyman alpha Emitters from Redshift z~3 to z~7
accretion – infrared: galaxies.halo:galaxies
2011/10/9
Rapid mass assembly, likely from mergers or smooth accretion, has been predicted to play a vital role in star-formation in high-redshift Lyman alpha (Lya) emitters. Here we predict the major merger, m...