Limits on the HI content of the dwarf galaxy Hydra II
Astrophysics of Galaxies
2015-12-02 v1
Abstract
Sensitive 21cm HI observations have been made with the Green Bank Telescope toward the newly-discovered Local Group dwarf galaxy Hydra II, which may lie within the leading arm of the Magellanic Stream. No neutral hydrogen was detected. Our 5-sigma limit of MHI < 210 solar masses for a 15 km/s linewidth gives a gas-to-luminosity ratio MHI/L_V < 2.6 x 10^{-2} Mo / Lo. The limits on HI mass and MHI/L_V are typical of dwarf galaxies found within a few hundred kpc of the Milky Way. Whatever the origin of Hydra II, its neutral gas properties are not unusual.
Keywords
Cite
@article{arxiv.1511.05069,
title = {Limits on the HI content of the dwarf galaxy Hydra II},
author = {Andrew Janzen and Eve M. Klopf and Felix J. Lockman and Rodolfo Montez and Kurt Plarre and Nau Raj Pokhrel and Robert J. Selina and A. Togi and Mehrnoush Zomederis},
journal= {arXiv preprint arXiv:1511.05069},
year = {2015}
}
Comments
Accepted for publication in Astronomy & Astrophysics