搜索结果: 1-11 共查到“天文学 Break-Up”相关记录11条 . 查询时间(0.081 秒)
We use hydrodynamic cosmological simulations to predict correlations between Lyα forest absorption and the galaxy distribution at redshift z 3. The probability distribution function (PDF) of Lyα flux ...
STAR FORMATION RATES IN LYMAN BREAK GALAXIES: RADIO STACKING OF LBGs IN THE COSMOS FIELD AND THE SUB-mu Jy RADIO SOURCE POPULATION
formation evolution
2014/12/23
We present an analysis of the radio properties of large samples of Lyman break galaxies (LBGs) at z ~ 3, 4, and 5 from the COSMOS field. The median stacking analysis yields a statistical detection of ...
Investigating the break in the Cepheid period-luminosity relation and its implications
Cepheid variable stars Cycle luminosity Linear time. universal
2014/12/9
The Cepheid period-luminosity (PL) relation is a major component in the distance scale ladder. This relation has been considered to be linear (within period ranges of ～2 to ～100 days) and universal (i...
A Search for Lyman Break Galaxies in the CDF-S Using Swift UVOT
Search Lyman Break Galaxies CDF-S Using Swift
2011/10/12
While the Swift satellite is primarily designed to study gamma-ray bursts, its ultraviolet and optical imaging and spectroscopy capabilities are also being used for a variety of scientific programs. I...
Keck Spectroscopy of Faint 3Break Galaxies:- Evidence for a Declining Fraction of Emission Line Sources In the Redshift Range 6
Keck Spectroscopy Declining Fraction Emission Line Sources
2011/9/29
Using deep Keck spectroscopy of Lyman break galaxies selected from infrared imaging data taken with WFC3/IR onboard the Hubble Space Telescope, we present new evidence for a reversal in the redshift-d...
Origin of the Ultrahigh-Energy Cosmic Rays and their Spectral Break
Ultrahigh-Energy Cosmic Rays Spectral Break
2010/11/15
In this concise, albeit subjective review of structure formation, I shall introduce the cosmological standard model and its theoretical and observational underpinnings. I will focus on recent results ...
HST SpectralObservations near the He II Ly-alpha Break: Implications for He II Reionization
galaxies active intergalactic medium quasars general ultraviolet galaxies
2010/11/12
Quasars that allow the study of IGM He II are very rare, since they must be at high redshift along sightlines free of substantial hydrogen absorption, but recent work has dramatically expanded the num...
GRB 050502B optical afterglow: a jet break at high redshift
Gamma rays bursts observations individual GRB 050502B
2010/11/9
Aims. GRB050502B is well known for the very bright flare displayed in its X-ray light curve. Despite extensive studies, however, the optical light curve has never been discussed and its redshift is un...
A nearby GRB host prototype for z~7 Lyman-break galaxies: Spitzer-IRS and X-shooter spectroscopy of the host galaxy of GRB031203
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
Gamma-ray burst (GRB) host galaxies have been studied extensively in optical photometry and spectroscopy. Here we present the first mid-infrared spectrum of a GRB host, HG031203. It is one of the near...
Two Lensed z~3 Lyman Break Galaxies Discovered in the SDSS Giant Arcs Survey
galaxies formation galaxies high-redshift gravitational lensing cosmology early universe
2010/3/9
We report the discovery of two strongly-lensed z ~ 3 Lyman Break Galaxies (LBGs) discovered as u-band dropouts as part of the SDSS Giant Arcs Survey (SGAS). The first, SGAS J122651.3+215220 at z = 2.9...
The Nature of the Far-UV Break in the Energy Distribution of Quasars
Far-UV Break Quasars Energy Distribution
2009/7/9
The Nature of the Far-UV Break in the Energy Distribution of Quasars。