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The Linewidth-Luminosity Relation for Blue Galaxies at a redshift of ∼ 0.25

Published online by Cambridge University Press:  25 May 2016

Hans-Walter Rix ,
Matthew Colless  and
Puragra Guhathakurta
Hans-Walter Rix
Affiliation:
MPIA, Garching and Steward Observatory
Matthew Colless
Affiliation:
MSSSO, Australian National University
Puragra Guhathakurta
Affiliation:
Lick Observatory, UC Santa Cruz

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This is a progress report on a collaborative effort to probe galaxy evolution by constraining the central mass-to-light ratios of distant field galaxies. Details can be found in a forthcoming paper (Rix, Guhathakurta, Colless & Ing 1996, RGCI). At the moment, the program is focused on the question of how over-luminous the abundant blue field galaxies at z ∼ 0.3 are (see Koo, K. and Kron, R. 1992), compared to galaxies of the same circular velocity and type at z ∼ 0. We have measured the integrated [OII] linewidths for a complete sample of distant blue galaxies to establish a linewidth-luminosity-color relation for this population and to compare this relation to the one for local galaxies. In addition, we explore practical strategies to obtain and analyze data so as to best relate the observable quantities (e.g. linewidths) to the physical quantities of interest (such as vcirc or M/L).

Type
High Redshift Galaxies
Information
Symposium - International Astronomical Union , Volume 171: New Light on Galaxy Evolution , 1996 , pp. 241 - 244
Copyright
Copyright © Kluwer 1996 

References

Bothun, G. et al., 1985, ApJS, 57, 423 Google Scholar
Colless, M., Ellis, R., Broadhurst, T., Taylor, K., & Peterson, B., 1993, MN, 261, 18.Google Scholar
Koo, D. and Kron, R., 1992, ARAA, 30, 613 Google Scholar
Rix, H.-W., Guhathakurta, P., Colless, M. and Ing, K., 1996, MNRAS, to be submitted Google Scholar