arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0909.0781astro-ph.CO
收藏

VIVA,VLA在原子气体中Virgo螺旋的成像:I.图集和HI属性

VIVA, VLA Imaging of Virgo spirals in Atomic gas: I. The Atlas & The HI Properties

Aeree Chung, J. H. van Gorkom, Jeffrey D. P. Kenney, Hugh Crowl, Bernd Vollmer

摘要:

本文介绍了一个新的室女座星系VLA HI成像巡天VIVA(the VLA Imaging survey of Virgo galaxies in Atomic gas)的结果。该巡天包括53个精心挑选的晚型星系(48个旋涡星系和5个不规则星系)的高分辨率HI数据。目标是研究环境对星系团HI气体性质的影响,以了解哪些物理机制影响不同密度区域的星系演化,并确定星系团的影响范围。作为一个动态年轻的星系团,室女座包含了经历各种环境影响的星系的例子。它的接近使我们能够非常详细地研究每个星系。我们已经选择了室女座星系的恒星形成的性质在低到高密度区域(在从M87的投影距离,d_87=0.3-3.3 Mpc)的范围。与以往的研究相反,样品中有一半以上(约60%)的星系在B_T中的亮度小于12等。总的来说,所选星系在形态类型、系统速度、子团成员、HI质量和亏损等方面都较好地代表了晚型室女座星系(S 0/a到Sd/Irr),最低到mp <~14.6。在本文(VIVA I:的图集和HI性质),我们提出了HI地图和性质,并详细描述了个别星系的HI形态学和运动学(略)。

英文摘要:

We present the result of a new VLA HI Imaging survey of Virgo galaxies, VIVA (the VLA Imaging survey of Virgo galaxies in Atomic gas). The survey includes high resolution HI data of 53 carefully selected late type galaxies (48 spirals and 5 irregular systems). The goal is to study environmental effects on HI gas properties of cluster galaxies to understand which physical mechanisms affect galaxy evolution in different density regions, and to establish how far out the impact of the cluster reaches. As a dynamically young cluster, Virgo contains examples of galaxies experiencing a variety of environmental effects. Its nearness allows us to study each galaxy in great detail. We have selected Virgo galaxies with a range of star formation properties in low to high density regions (at the projected distance from M87, d_87=0.3-3.3 Mpc). Contrary to pr evious studies, more than half of the galaxies in the sample (~60%) are fainter than 12 mag in B_T. Overall, the selected galaxies represent the late type Virgo galaxies (S0/a to Sd/Irr) down to m_p<~14.6 fairly well in morphological type, systemic velocity, subcluster membership, HI mass and deficiency. In this paper (VIVA I: the atlas and the HI properties), we present HI maps and properties, and describe the HI morphology and kinematics of individual galaxies in detail (abbreviated).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑