搜索结果: 1-15 共查到“天文学 Population”相关记录45条 . 查询时间(0.156 秒)
The NAture of the Faint Far-Infrared Extragalactic Source Population: Optical/NIR and Radio Follow-Up Observationts of ISOPHOT Deep-Field Sources using the Keck, Subaru, and VLA Telescopes.
Keck Subaru
2014/12/26
In order to search for obscured objects at high redshifts, we have made deep far-infrared (FIR) deep survey in the Lockman Hole using ISOPHOT onboard ISO (Kawara et al. 1998, A&A, 336, L9). In this su...
A new population of X-ray transients in the Galactic Centre
X-ray transients the Galactic
2014/12/24
A comparison of the XMM-Newton and Chandra Galactic Centre (GC) Surveys has revealed two faint X-ray transients with contrasting properties. The X-ray spectrum of XMM J174544-2913.0 shows a strong iro...
Evidence for a population of high-redshift submillimeter galaxies from interferometric imaging
submillimeter formation
2014/12/23
We have used the Submillimeter Array to image a flux-limited sample of seven submillimeter galaxies, selected by the AzTEC camera on the JCMT at 1.1 mm, in the COSMOS field at 890 μ m with ~2'' resolu...
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 ...
EVIDENCE FOR 1000 km s–1 MOLECULAR OUTFLOWS IN THE LOCAL ULIRG POPULATION
star formation history,
2014/12/20
The feedback from galactic outflows is thought to play an important role in shaping the gas content, star formation history, and ultimately the stellar mass function of galaxies. Here we present evide...
The AzTEC Millimeter-wave Camera: Design, Integration, Performance, and the Characterization of the (sub-)millimeter Galaxy Population
Detectors Galaxies Instrumentation Starbursts Far-infrared background
2014/12/9
One of the primary drivers in the development of large format millimeter detector arrays is the study of sub-millimeter galaxies (SMGs) - a population of very luminous high-redshift dust-obscured star...
"Revealing a Population of Heavily Obscured Active Galactic Nuclei at z=0.5-1 in the Chandra Deep Field-South
Revealing Population Heavily Obscured Active Galactic Nuclei
2011/10/10
We identify a numerically significant population of heavily obscured AGNs at z~0.5-1 in the Chandra Deep Field-South (CDF-S) and Extended Chandra Deep Field-South by selecting 242 X-ray undetected obj...
ACCESS IV: The quenching of star formation in a cluster population of dusty S0s
galaxies: star formation — galaxies: evolution — infrared: galaxies —galaxies: clusters: general—galaxies: clusters: individual (A3558)—galaxies: clusters: individual (A3562)
2011/10/11
We present an analysis of the mid-infrared (MIR) colours of 165 70um-detected galaxies in the Shapley supercluster core (SSC) at z=0.048 using panoramic Spitzer/MIPS 24 and 70um imaging. While the bul...
BLR Physical Conditions in Extreme Population A Quasars: a Method to Estimate Central Black Hole Mass at High Redshift
Physical Conditions Extreme Population Quasars
2011/10/10
We describe a method for determination of physical conditions in the broad line regions of a significant subsample of Seyfert-1 nuclei and quasars. Several diagnostic ratios based on intermediate (AlI...
The Optical Gravitational Lensing Experiment. Analysis of the bulge RR Lyrae population from the OGLE-III data
Optical Gravitational Lensing Experiment Analysis bulge population
2011/10/10
We have analyzed data on 16,838 RR Lyrae variables observed toward the Galactic bulge during the third phase of the Optical Gravitational Lensing Experiment (OGLE) in 2001-2009. Using this type of sta...
Structure and Population of the NGC55 Stellar Halo from a Subaru/Suprime-Cam Survey
Population Stellar Halo Subaru Suprime-Cam Survey
2011/9/28
As part of our survey of galactic stellar halos, we investigate the structure and stellar populations of the northern outer part of the stellar halo in NGC55, a member galaxy of the Sculptor Group, us...
The non-segregated population of blue straggler stars in the remote globular cluster Palomar 14
non-segregated population straggler stars remote globular cluster
2011/9/27
We used deep wide-field observations obtained with the Canada-France-Hawaii Telescope to study the blue straggler star (BSS) population in the innermost five arcminutes of the remote Galactic globular...
Substellar Objects in Nearby Young Clusters (SONYC) II: The Brown Dwarf Population of Rho Ophiuchi
Substellar Objects Nearby Young Clusters
2011/1/11
SONYC - Substellar Objects in Nearby Young Clusters - is a survey program to investigate the frequency and properties of brown dwarfs down to masses below the Deuterium burning limit in nearby star fo...
A view of the solar neighbourhood: the local population of planetary nebulae and their mimics
the solar neighbourhood the local population
2011/1/10
We have, for the first time, compiled a nearly complete census of planetary nebulae (PNe) centred on the Sun. Our goal is the generation of an unbiased volume-limited sample, in order to answer some l...
The massive binary population of the starburst cluster Westerlund 1
The massive binary population the starburst cluster Westerlund 1
2011/1/13
We present initial results from a long-baseline radial velocity survey for massive binaries in the cluster Westerlund 1. Four systems are examined: the dust-producing WC binary W239, the double-lined...