潮汐相互作用BCD对ESO 435-IG20和ESO435-IG16的研究

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.2015.30.2.513

Jinhyub Kim, E. Sung, A. Chung, L. Staveley-Smith

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引用次数: 0

摘要

我们研究了一对蓝紧凑型矮星系(bcd) ESO 435-IG20和ESO 435-IG16的Hi数据，这些数据是由澳大利亚望远镜紧凑型阵列获得的。外围的Hi盘在两个星系中都受到高度干扰和不对称，仅在一侧显示出气体尾巴和/或宽/延伸的气体盘。基于它们的低密度环境和类似红移的小投影距离(<80 kpc)，我们得出结论，这两个bcd之间的潮汐相互作用是造成Hi的形态和运动学特性的原因。我们还利用H和UV成像数据研究了它们的恒星形成率，以探测它们的相互作用历史。

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a Study of a Tidally Interacting BCD Pair: ESO 435-IG20 and ESO435-IG16

We investigate Hi data for a pair of blue compact dwarf galaxies (BCDs), ESO 435-IG20 and ESO 435-IG16, obtained with the Australia Telescope Compact Array. The outer Hi disk is highly disturbed and asymmetric in both galaxies showing a gas tail and/or a broad/extended gas disk on only one side. Based on their low-density surroundings and small projected distance (<80 kpc) at a similar redshift, we conclude that tidal interaction between these two BCDs is responsible for the morphological and kinematical peculiarities in Hi. We also investigate their star formation rates using H and UV imaging data to probe their interaction history.

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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.