H I absorption in the gigamaser galaxy TXS 2226-184 and the relation between H I absorption and water emission

G. B. Taylor, A. B. Peck, C. Henkel, H. Falcke, C. G. Mundell, C. P. O'Dea, S. A. Baum, J. F. Gallimore

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We report on the discovery of H I in absorption toward the gigamaser galaxy TXS 2226-184 using the Very Large Array. The absorption appears to consist of two components - one with a width of 125 km s-1 and one broader (420 km s-1) - both toward the compact radio source in the nucleus of the galaxy. Based on these large velocity widths, we suggest that the H I absorption is produced in the central parsecs of the galaxy, on a scale similar to that which gives rise to the water maser emission. This brings to eight the number of galaxies known to exhibit both water masers and H I absorption. We explore the relationship between these two phenomena and present a physically motivated (but unfruitful) search for water maser emission in five radio galaxies known to exhibit strong H I absorption.

Original languageEnglish
Pages (from-to)88-94
Number of pages7
JournalAstrophysical Journal
Volume574
Issue number1
DOIs
Publication statusPublished - 20 Jul 2002

Keywords

  • Galaxies: active
  • Galaxies: individual (TXS 2226-184)
  • Galaxies: nuclei
  • Masers
  • Radio lines: galaxies

ASJC Scopus subject areas

  • Space and Planetary Science
  • Nuclear and High Energy Physics

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    Taylor, G. B., Peck, A. B., Henkel, C., Falcke, H., Mundell, C. G., O'Dea, C. P., Baum, S. A., & Gallimore, J. F. (2002). H I absorption in the gigamaser galaxy TXS 2226-184 and the relation between H I absorption and water emission. Astrophysical Journal, 574(1 ), 88-94. https://doi.org/10.1086/340836