搜索结果: 106-120 共查到“天文学 galaxies”相关记录488条 . 查询时间(0.114 秒)
We present a study of the variation of spatial structure of stellar populations within dwarf galaxies as a function of the population age. We use deep Hubble Space Telescope/Advanced Camera for Survey...
We measure the angular two-point correlation function of sub-millimeter galaxies (SMGs) from 1.1-millimeter imaging of the COSMOS field with the AzTEC camera and ASTE 10-meter telescope. These data yi...
THE REDSHIFT SEARCH RECEIVER 3 MM WAVELENGTH SPECTRA OF 10 GALAXIES
wavelength spectra galaxies
2014/12/20
The 3 mm wavelength spectra of 10 galaxies have been obtained at the Five College Radio Astronomy Observatory using a new, very broadband receiver and spectrometer, called the Redshift Search Receiver...
IDENTIFICATION OF A COMPLETE 160 μm FLUX-LIMITED SAMPLE OF INFRARED GALAXIES IN THE ISO LOCKMAN HOLE 1 deg2 DEEP FIELDS: SOURCE PROPERTIES AND EVIDENCE FOR STRONG EVOLUTION IN THE FIR LUMINOSITY FUNCTION FOR ULIRGs
starburst-active galactic nucleus (AGN) composite AGN spectral types
2014/12/20
We have identified a complete, flux-limited (S 160>120 mJy) sample of 160 μm selected sources from Spitzer observations of the 1 deg2 Infrared Space Observatory (ISO) Deep Field region in the Lockman ...
The JCMT Nearby Galaxies Legacy Survey – V. The CO(J= 3–2) distribution and molecular outflow in NGC 4631
galaxy star
2014/12/20
We have made the first map of CO(J= 3–2) emission covering the disc of the edge-on galaxy, NGC 4631, which is known for its spectacular gaseous halo. The strongest emission, which we model with a Gaus...
A massive protocluster of galaxies at a redshift of z ≈ 5.3
Massive clusters of galaxies cosmological simulations
2014/12/20
Massive clusters of galaxies have been found that date from as early as 3.9 billion years1 (3.9 Gyr; z = 1.62) after the Big Bang, containing stars that formed at even earlier epochs2, 3. Cosmol...
A GREEN BANK TELESCOPE SURVEY FOR H I 21 cm ABSORPTION IN THE DISKS AND HALOS OF LOW-REDSHIFT GALAXIES
21 cm absorption survey Green Bank Telescope
2014/12/20
We present an H I 21 cm absorption survey with the Green Bank Telescope (GBT) of galaxy-quasar pairs selected by combining galaxy data from the Sloan Digital Sky Survey (SDSS) and radio sources from t...
The stellar and gaseous content of massive low surface brightness disk galaxies
Multiple wavelength Subset. Extreme type Galaxy Atomic gas Spiral galaxies
2014/12/9
This dissertation presents a multi-wavelength study of a subset of an extreme type of galaxy, those which have low surface brightnesses large disks, and large amounts of atomic gas, yet which have tot...
The stellar and gaseous content of massive low surface brightness disk galaxies
Multiple wavelength Subset. Extreme type Galaxy Atomic gas Spiral galaxies
2014/12/9
This dissertation presents a multi-wavelength study of a subset of an extreme type of galaxy, those which have low surface brightnesses large disks, and large amounts of atomic gas, yet which have tot...
The clustering of galaxies around damped absorbers
Clustering damping Galaxy Wide-angle image The redshift slices. Bayesian metering redshift technology
2014/12/9
We measured the clustering of galaxies around damped absorbers, all at a redshift of approximately three. For this purpose, we used wide-field images that covered a total area of one square degree. We...
Growth of galaxies in SPH simulations
Explore Galaxy formation. Smooth particle hydrodynamics The universe simulation Galactic gas Temperature history Galaxy star
2014/12/9
We explore the growth of galaxies formed in self-consistent Smoothed Particle Hydrodynamic (SPH) cosmological simulations. In the first Chapter, we examine the temperature history of gas accreted by f...
Multiwavelength Study Of The Distribution Of Neutral Gas In And Around Galaxies And Groups Of Galaxies
Pure sciences Absorption Compact groups Galaxy evolution Hydrogen Lyman alpha
2014/12/9
We study the distribution and nature of neutral hydrogen in various environments. We start by exploring the disk and halos of galaxies in Chapter 1. Our sample consists of 23 sightlines through 15 low...
Constraining Stellar Feedback: Ionized Gas Structures In Local Starburst Galaxies
Pure sciences Ionized gas structures Interstellar medium Starburst galaxies Stellar feedback
2014/12/9
Stellar feedback, i.e., the return of mechanical energy from supernova explosions, and massive star and AGN winds to the interstellar medium, is one of the fundamental processes that shape galaxy evol...
The Assembly of Galaxies Over Cosmic Time
cosmology: observations galaxies: evolution galaxies: formation galaxies: high-redshift galaxies: stellar content galaxies: structure
2014/12/9
To Understand how galaxies were assembled across the cosmic time remains one of the most outstanding questions in astronomy. The core of this question is how today's Hubble Sequence, namely the differ...
Characterizing Distant Galaxies: Spectral Energy Distribution Analysis of X-ray Selected Star Forming Galaxies
galaxies - fundamental parameters Galaxies - high redshift Galaxies - submillimeter methods - statistical
2014/12/9
Comprehensive and robust analysis of galaxies found throughout cosmic time provides the means to probe the underlying characteristics of our Universe. Coupling observations and theory, spectral energy...