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

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dc.contributor.author Taylor, Gregory en_US
dc.contributor.author Peck, Alison en_US
dc.contributor.author Henkel, Christian en_US
dc.contributor.author Falcke, Heino en_US
dc.contributor.author Mundell, Carole en_US
dc.contributor.author O'Dea, Christopher en_US
dc.contributor.author Baum, Stefi en_US
dc.contributor.author Gallimore, Jack en_US
dc.date.accessioned 2006-05-11T18:12:19Z en_US
dc.date.available 2006-05-11T18:12:19Z en_US
dc.date.issued 2002-07-20 en_US
dc.identifier.citation Astrophysical Journal 574 (2002) 88-94 en_US
dc.identifier.issn 1538-4365 en_US
dc.identifier.uri http://hdl.handle.net/1850/1790 en_US
dc.description RIT community members may access full-text via RIT Libraries licensed databases: http://library.rit.edu/databases/
dc.description.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 Hi absorption (Refer to PDF file for exact formulas). en_US
dc.description.sponsorship We thank the referee for insightful comments on an earlier draft of the manuscript. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, Caltech, under contract with NASA. This research has also made use of NASA’s Astrophysics Data System Abstract Service. en_US
dc.format.extent 202240 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher American Astronomical Society en_US
dc.relation.ispartofseries vol. 574 en_US
dc.relation.ispartofseries no. 1 en_US
dc.relation.ispartofseries pps. 88-94 en_US
dc.subject Galaxies-active en_US
dc.subject Galaxies-individual (TXS 2226-184) en_US
dc.subject Galaxies-nuclei en_US
dc.subject Masers en_US
dc.subject Radio lines-galaxies en_US
dc.title HI absorption in the gigamaser galaxy TXS 2226-184 and the relation between HI absorption and water emission en_US
dc.type Article en_US
dc.identifier.url http://dx.doi.org/10.1086/340836

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