Neutral Hydrogen in Arp 158
Astrophysics
2009-11-10 v1
Abstract
We present 21 cm observations of Arp 158. We have performed a study of the neutral hydrogen (HI) to help us understand the overall formation and evolution of this system. This is a disturbed system with distinct optical knots connected by a linear structure embedded in luminous material. There is also a diffuse spray to the southeast. The HI seems to be made up of three distinct, kinematically separate systems. Arp 158 bears a certain optical resemblance to NGC 520 (Arp 157), which has been identified as a mid-stage merger. From our 21 cm observations of Arp 158, we also see a comparable HI content with NGC 520. These similarities suggest that Arp 158 is also an intermediate stage merger.
Cite
@article{arxiv.astro-ph/0405405,
title = {Neutral Hydrogen in Arp 158},
author = {Mansie G. Iyer and Caroline E. Simpson and Stephen T. Gottesman and Benjamin K. Malphrus},
journal= {arXiv preprint arXiv:astro-ph/0405405},
year = {2009}
}
Comments
11 pages, 16 figures. Accepted for publication in AJ