Mapping the Extended H I Distribution of Three Dwarf Galaxies

Type Journal Article
Names Deidre A. Hunter, Fakhri Zahedy, Emily C. Bowsher, Eric M. Wilcots, Amanda A. Kepley, Veronika Gaal
Publication The Astronomical Journal
Volume 142
Issue 5
Pages 173
Date November 1, 2011
Library Catalog NASA ADS
Abstract We present large field H I-line emission maps obtained with the single-dish Green Bank Telescope centered on the dwarf irregular galaxies Sextans A, NGC 2366, and WLM. We do not detect the extended skirts of emission associated with the galaxies that were reported from Effelsberg observations. The ratio of H I at 1019 atoms cm–2 to optical extents of these galaxies is instead 2-3, which is normal for this type of galaxy. There is no evidence for a truncation in the H I distribution >=1019 atoms cm–2.
Tags Galaxies: ISM, galaxies: individual: Sextans A NGC 2366 WLM, galaxies: irregular
UW-Madison Astronomy Home