HI Absorption Toward HII Regions at Small Galactic Longitudes
Astrophysics of Galaxies
2015-06-16 v1
Abstract
We make a comprehensive study of HI absorption toward HII regions located within Galactic longitudes less than 10 degrees. Structures in the extreme inner Galaxy are traced using the longitude-velocity space distribution of this absorption. We find significant HI absorption associated with the Near and Far 3kpc Arms, the Connecting Arm, Banias Clump 1 and the H I Tilted Disk. We also constrain the line of sight distances to HII regions, by using HI absorption spectra together with the HII region velocities measured by radio recombination lines.
Keywords
Cite
@article{arxiv.1308.2769,
title = {HI Absorption Toward HII Regions at Small Galactic Longitudes},
author = {C. Jones and J. M. Dickey and J. R. Dawson and N. M. McClure-Griffiths and L. D. Anderson and T. M. Bania},
journal= {arXiv preprint arXiv:1308.2769},
year = {2015}
}
Comments
Complete figure set available in online version of journal. Accepted by ApJ August 8, 2013