搜索结果: 1-14 共查到“天体物理学 High Redshift”相关记录14条 . 查询时间(0.046 秒)
Dense Molecular Gas Excitation at High Redshift: Detection of HCO+(J=4-3) Emission in the Cloverleaf Quasar
galaxies active — galaxies starburst — galaxies formation — galaxies
2010/11/10
We report the detection of HCO+(J=4→3) emission in the Cloverleaf Quasar at z=2.56, using
the IRAM Plateau de Bure Interferometer. HCO+ emission is a star formation indicator similar
to HCN, tracing...
The high-redshift Universe with the International X-ray Observatory
Galaxies active – X-rays Active Galactic Nuclei – galaxies high-redshift
2010/11/10
We discuss some of the main open issues related to the light–up and evolution of the first accreting sources powering high redshift luminous quasars.We discuss the perspectives of future deep X–ray su...
The HETDEX Pilot Survey III: The Low Metallicities of High-Redshift Lyman Alpha Galaxies
galaxies evolution
2010/11/9
We present the results of Keck/NIRSPEC spectroscopic observations of three Ly emitting galaxies (LAEs)at z∼ 2.3 discoveredwith the HETDEX pilot survey. We detectH , [O III], and H emission fro...
Star formation trends in high-redshift galaxy surveys: the elephant or the tail?
high-redshift galaxy elephan tail
2010/11/15
Star formation rate and accummulated stellar mass are two fundamental physical quantities that describe the evolutionary state of a forming galaxy. Two recent at-tempts to determine the relationship b...
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...
Evolution of gaseous disk viscosity driven by supernova explosion. II. Structure and emissions from star-forming galaxies at high redshift
gaseous disk viscosity driven supernova explosion
2011/1/10
(Abridged) High redshift galaxies are undergoing intensive evolution of dynamical structure and morphologies. We incorporate the feedback into the dynamical equations through mass dropout and angular ...
Dense Molecular Gas Excitation in Nuclear Starbursts at High Redshift: HCN, HNC, and HCO+(J=6-5) Emission in the z=3.91 Quasar Host of APM08279+5255
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/29
We report the detection of surprisingly strong HCN, HNC, and HCO+(J=6-5) emission in the host galaxy of the z=3.91 quasar APM08279+5255 through observations with CARMA. HCN, HNC, and HCO+ are typicall...
Constraining the Minimum Mass of High-Redshift Galaxies and Their Contribution to the Ionization State of the IGM
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/29
We model the latest HST WFPC3/IR observations of > 100 galaxies at redshifts z=7-8 in terms of a hierarchical galaxy formation model with starburst activity. Our model provides a distribution of UV lu...
Improving the Estimation of Star formation Rates and Stellar Population Ages of High-redshift Galaxies from Broadband Photometry
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
We explore methods to improve the estimates of star formation rates and mean stellar population ages from broadband photometry of high redshift star-forming galaxies. We use synthetic spectral templat...
The Spitzer High Redshift Radio Galaxy Survey
Cosmology and Extragalactic Astrophysics (astro-ph.CO) Galaxy Astrophysics (astro-ph.GA)
2010/12/27
We present results from a comprehensive imaging survey of 70 radio galaxies at redshifts 1sing all three cameras onboard the Spitzer Space Telescope. The resulting spectral energy distribution...
The M_BH-M_star relation of obscured AGNs at high redshift
Cosmology and Extragalactic Astrophysics (astro-ph.CO) Galaxy Astrophysics (astro-ph.GA)
2010/12/24
We report the detection of broad Halpha emission in three X-ray selected obscured AGNs at z=1-2. By exploiting the Halpha width and the intrinsic X-ray luminosity, we estimate their black hole masses,...
Morphology and Size Differences between Local & High Redshift Luminous Infrared Galaxies
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
We show that the star-forming regions in high-redshift luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) and submillimeter galaxies (SMGs) have similar physical scales to those in local ...
HerMES : SPIRE detection of high redshift massive compact galaxies in GOODS-N field
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
We have analysed the rest-frame far infrared (FIR) properties of a sample of massive (Mstar > 10^11Msun) galaxies at 2 in the GOODS (Great Observatories Origins Deep Survey) North field using the ...
COSMOS：A Comprehensive Study of Galaxies at High Redshift with EMIR on the GTC
COSMOS High Redshift Galaxies
2009/6/12
COSMOS：A Comprehensive Study of Galaxies at High Redshift with EMIR on the GTC。