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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1639
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dc.contributor.authorOmar, A.-
dc.contributor.authorDwarakanath, K.S.-
dc.date.accessioned2007-01-02T06:46:00Z-
dc.date.available2007-01-02T06:46:00Z-
dc.date.issued2006-03-
dc.identifier.citationJournal of Astrophysics and Astronomy, 2006, Vol.27, p7-23.en
dc.identifier.issn0250-6335-
dc.identifier.urihttp://hdl.handle.net/2289/1639-
dc.description.abstractThe Tully-Fisher (TF) or the luminosity-linewidth relations of the galaxies in the Eridanus group are constructed using the HI rotation curves and the luminosities in the optical and in the near-infrared bands. The slopes of the TF relations (absolute magnitude vs log 2 flat) are -8.6 ±1.1, -10.0 ±1 5, -10.7 ±2.1, and -9.7 ±1.3 in the R, J, H, and K bands respectively for galaxies having flat HI rotation curves. These values of the slopes are consistent with those obtained from studies of other groups and clusters. The scatter in the TF relations is in the range 0.5-1.1 mag in different bands. This scatter is considerably larger com-pared to those observed in other groups and clusters. It is suggested that the larger scatter in the TF relations for the Eridanus group is related to the loose structure of the group. If the TF relations are constructed using the baryonic mass (stellar +HI +Helium mass) instead of the stellar lumi-nosity, nearly identical slopes are obtained in the R and in the near-infrared bands. The baryonic TF (baryonic mass vs log 2 flat) slope is in the range 3.5-4.1.en
dc.format.extent181682 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherIndian Academy of Sciences, Bangalore, India.en
dc.relation.urihttp://adsabs.harvard.edu/cgi-bin/bib_query?2006JApA...27....7Oen
dc.relation.urihttp://www.ias.ac.in/jaa/mar2006/en
dc.rightsIndian Academy of Sciences, Bangalore, India.en
dc.subjectGalaxy:rotation, luminosity-linewidth relationen
dc.subjectgalaxies:groups-individualen
dc.subjectEridanus-radio linesen
dc.subjectHI 21 cm-lineen
dc.titleThe Tully-Fisher relations of the Eridanus group of galaxiesen
dc.typeArticleen
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