搜索结果: 1-10 共查到“知识库 天文学 Gaia”相关记录10条 . 查询时间(0.103 秒)
Gaia: a Window to Large Scale Flows
Gaia Window Large Scale Flows redshifts galaxy distances
2012/2/21
Using redshifts as proxy for galaxy distances, estimates of the 2D transverse peculiar velocities of distant galaxies ($cz\ltsim 2\times 10^4 \kms$) can be obtained from Gaia's measurements of proper ...
Detectability of GRB optical afterglows with Gaia satellite
Detectability optical Gaia satellite
2011/10/9
With the launch of Gaia satellite, detection of many different types of transient sources will be possible, one of them being optical afterglows of gamma-ray bursts (GRBs). Using the knowledge of the ...
A grid of NLTE corrections for magnesium and calcium in late-type giant and supergiant stars: application to Gaia
formation radiative transfer stars late-type atmospheres abundances
2011/10/18
We investigate NLTE effects for magnesium and calcium in the atmospheres of late-type giant and supergiant stars. The aim of this paper is to provide a grid of NLTE/LTE equivalent width ratios W/W* of...
Spectroscopic and photometric surveys of the Milky Way and its stellar clusters in the Gaia era
Spectroscopic photometric surveys o stellar clusters
2011/9/30
This contribution to the Stellar Clusters & Associations: A RIA Workshop on Gaia deals with surveys of stars, in particular spectroscopic surveys, with attention to their impact on cluster studies, an...
A fast 2D image reconstruction algorithm from 1D data for the Gaia mission
methods data analysis
2011/8/24
A fast 2-dimensional image reconstruction method is presented, which takes as input 1-dimensional data acquired from scans across a central source in different orientations. The resultant reconstructe...
A fast 2D image reconstruction algorithm from 1D data for the Gaia mission
methods: data analysis
2011/9/26
A fast 2-dimensional image reconstruction method is presented, which takes as input 1-dimensional data acquired from scans across a central source in different orientations. The resultant reconstructe...
第二个天体测量卫星(Gaia)项目的进展
Gaia参考架 自行 引力波 微引力透镜
2012/9/12
简述了第二个天体测量卫星Gaia(将于2013年3月发射)项目的科学意义,并给出了该项目的组织工作和最近的进展。描述了Gaia观测资料处理的基本原理,以及与依巴谷观测资料处理的不同点。介绍了Gaia参考架构建的考虑,以及为了构建微角秒量级的参考架,应在自行中加入系统差改正,如长期光行差、引力波效应、宇宙膨胀各向异性的影响、弱的微引力透镜和微引力透镜噪声效应等。介绍了Gaia光学参考架与射电参考架I...
The catalog of radial velocity standard stars for the Gaia RVS: status and progress of the observations
Galaxy Astrophysics (astro-ph.GA) Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
A new full-sky catalog of Radial Velocity standard stars is being built for the determination of the Radial Velocity Zero Point of the RVS on board of Gaia. After a careful selection of 1420 candidate...
The Gaia Spectroscopic Instrument (RVS): A Technical Challenge
Instrumentation and Methods for Astrophysics (astro-ph.IM)
2010/12/23
The lack of radial velocity data in the Hipparcos catalogue was considered a significant deficiency, so when Gaia was conceived, a spectrometer was a core constituent of its payload. The Gaia Radial V...
Spectroscopy, photometry and micro-arcsec astrometry Of binaries with the Gaia space mission and with the rave Experiment
Spectroscopy photometry micro-arcsec astrometry Of binaries
2009/6/17
Spectroscopy, photometry and micro-arcsec astrometry Of binaries with the Gaia space mission and with the rave Experiment。