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dc.contributor.authorDickey, J.M.
dc.contributor.authorBrinks, E.
dc.identifier.citationDickey , J M & Brinks , E 1993 , ' An H I absorption survey of M31 and M33 - The mixture of warm and cool phases in the interstellar media of spiral galaxies ' , The Astrophysical Journal , vol. 405 , no. 1 , pp. 153-162 .
dc.identifier.otherPURE: 150052
dc.identifier.otherPURE UUID: 0037b7d5-5dfa-4c48-bcb2-64e0b81ac819
dc.identifier.otherdspace: 2299/2776
dc.identifier.otherScopus: 12044252960
dc.identifier.otherORCID: /0000-0002-7758-9699/work/30407948
dc.descriptionOriginal article can be found at: Copyright American Astronomical Society. DOI: 10.1086/172348 [Full text of this article is not available in the UHRA]
dc.description.abstractThe VLA in A-array is used to survey the nearby spiral galaxies M31 and M33 in the 21-cm line in order to measure absorption by the H I toward background continuum sources. Spectral line cubes with rms noise less than 1.2 mJy are obtained in spectral channels of 2.6 km/s. The warm neutral medium is found to be the dominant form of atomic hydrogen in M31 and M33. This phase is robust to variations in the interstellar environment represented by the differences among these galaxies. Compared with the Milky Way, M31 shows somewhat more cool atomic hydrogen (40 percent relative to 25 percent), whereas M33 shows less (15 percent). This suggests a trend with morphological type, with Sb galaxies exhibiting more cool H I relative to warm, and Sc galaxies, less, a trend similar to that seen by comparing molecular with atomic gas overall.en
dc.relation.ispartofThe Astrophysical Journal
dc.titleAn H I absorption survey of M31 and M33 - The mixture of warm and cool phases in the interstellar media of spiral galaxiesen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
rioxxterms.typeJournal Article/Review

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