The Ultraviolet sky surveys: filling the gap in our view of the Universe
The Ultraviolet sky surveys: filling the gap in our view of the Universe
复制标题
DOI：
10.1007/s10509-008-9761-3
复制
发表时间：
2009-04
影响因子：
1.9
通讯作者：
L. Bianchi
中科院分区：
文献类型：
--
作者：
L. Bianchi
GALEX任务在紫外线波段对天空进行成像和光谱调查，并在远紫外线和近紫外线两个紫外线波段提供前所未有的天空图，以及紫外线源目录。我将描述迄今为止完成的主要调查，以及调查紫外线源性质的结果。紫外巡天与多波长档案相联系，提供了很高的灵敏度来探测和表征几种天体物理物体，如低红移qso，恒星形成星系和银河系中的白矮星（WD）。特别描述了从GALEX成像数据中获得重要WDs普查的努力。对附近星系的专门深入调查提供了它们最近恒星形成的快照，揭示了恒星形成过程及其在不同环境和条件下的模式。深GALEX数据揭示了螺旋星系极端边缘的年轻恒星群，以前认为由于它们的低密度，它们对恒星形成是稳定的。在红移范围= 0-2的范围内，对数百万个近星系和远星系的紫外测量绘制了历史地图，并探索了宇宙中恒星形成的原因。
The GALEX mission is performing imaging and spectroscopic surveys of the sky at Ultraviolet wavelengths, and providing unprecedented sky maps in two UV bands, far-UV and near-UV, and catalogs of UV sources. I will describe the major surveys accomplished so far, and results in investigating the nature of the UV sources. The UV surveys, linked to a multi-wavelength archive, offer great sensitivity to detect and characterize several classes of astrophysical objects, such as low-redshift QSOs, star-forming galaxies, and white dwarfs (WD) in the Milky Way. Efforts towards obtaining a significant census of WDs from GALEX imaging data are described in particular. A dedicated, deep survey of nearby galaxies provides a snapshot of their recent star formation, shedding new light on the process of star formation and its modalities in different environments and conditions. Deep GALEX data revealed young stellar populations in extreme outskirts of spiral galaxies, previously thought to be stable against star formation given their low density. UV measurements for millions of nearby and distant galaxies map the history and probe the causes of star formation in the Universe over the redshift rangez=0–2.