CaltechAUTHORS
Published December 2015 | Version Published
Journal Article Open

Limits on the H I content of the dwarf galaxy Hydra II

Creators

  • 1. ROR icon California Institute of Technology
  • 2. ROR icon Oregon Institute of Technology
  • 3. ROR icon National Radio Astronomy Observatory
  • 4. ROR icon Vanderbilt University
  • 5. ROR icon Florida International University
  • 6. ROR icon University of Toledo
  • 7. ROR icon York University

Abstract

Sensitive 21 cm H I  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 5σ limit of M_(HI) ≤ 210 M_⊙ for a 15 km s^(-1) linewidth gives a gas to luminosity ratio M_(HI)/ L_V ≤ 2.6 × 10^(-2) M_⊙ L_⊙^(-1). The limits on H I  mass and M_(HI)/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.

Additional Information

© ESO, 2015. Received 8 September 2015 / Accepted 27 October 2015. We thank K. Spekkens for useful discussions and Richard Prestage for comments on the manuscript. These measurements were performed as part of the 2015 NRAO/NAIC Single Dish Summer School program.

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Additional details

Identifiers

Eprint ID
63718
Resolver ID
CaltechAUTHORS:20160115-125714532

Related works

Describes
http://arxiv.org/abs/1511.05069 (URL)

Dates

Created
2016-01-19
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Updated
2021-11-10
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