PRE-PROCESSING OF GALAXIES IN THE FILAMENTS AROUND THE VIRGO CLUSTER

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Journal of the Korean Astronomical Society Pub Date : 2015-09-30 DOI:10.5303/PKAS.2015.30.2.495

H. Yoon, A. Chung, C. Sengupta, O. I. Wong, M. Bureau, S. Rey, J. Gorkom

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引用次数: 2

Abstract

Galaxies can be \pre-processed" in the low-density outskirts by ambient medium in the laments or tidal interactions with other galaxies while falling into the cluster. In order to probe how early on and by which mechanisms galaxies can be aected before they enter high-density cluster environments, we are carrying out an atomic hydrogen (Hi) imaging study of a sample of galaxies selected from three lamentary structures around the Virgo cluster. Our sample consists of 14 late-type galaxies, which are potentially interacting with their surroundings. The Hi observations have been done using the Westerbork Synthesis Radio Telescope, the Giant Metrewave Radio Telescope, and the Jansky Very Large Array with column density sensitivity of 3-5 10 19 cm 2 in 3 per channel, which is low enough to detect faint Hi features in the outer disks of galaxies. In this work, we present the Hi data of two galaxies that were observed with GMRT. We examine the Hi morphology and kinematics to nd the evidence for gas-gas and/or tidal interactions, and discuss which mechanism(s) could be responsible for pre-processing in these cases.

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室女座星系团周围细丝中的星系的预处理

当星系落入星团时，可以在低密度的外围通过周围介质与其他星系的感流或潮汐相互作用进行“预处理”。为了探索星系在进入高密度星团环境之前的早期和通过何种机制可以受到影响，我们正在对从室女座星团周围的三个感伤结构中选择的星系样本进行原子氢(Hi)成像研究。我们的样本由14个晚期星系组成，它们可能与周围环境相互作用。利用韦斯特博克综合射电望远镜、巨型米波射电望远镜和杨斯基超大阵列进行了Hi观测，每个通道的柱密度灵敏度为3-5 - 10 - 19 cm 2 / 3，这个灵敏度足够低，可以探测到星系外盘微弱的Hi特征。在这项工作中，我们提出了用GMRT观测到的两个星系的Hi数据。我们研究了Hi的形态和运动学，以找到气-气和/或潮汐相互作用的证据，并讨论了在这些情况下哪种机制可能负责预处理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Korean Astronomical Society 地学天文-天文与天体物理

CiteScore

1.30

自引率

10.00%

发文量

审稿时长

>12 weeks

期刊介绍： JKAS is an international scientific journal publishing papers in all fields of astronomy and astrophysics. All manuscripts are subject to the scrutiny of referees. Manuscripts submitted to JKAS must comply with the ethics policy of JKAS. Six regular issues are published each year on February 28, April 30, June 30, August 31, October 31, and December 31. One year''s issues compose one volume.