Hostname: page-component-84b7d79bbc-2l2gl Total loading time: 0 Render date: 2024-07-27T16:55:33.779Z Has data issue: false hasContentIssue false

SFR Relation with Galaxy Environment and Colour at z between 0.03 and 0.1

Published online by Cambridge University Press:  01 August 2006

Premana W. Premadi
Affiliation:
Department of Astronomy, Institut Teknologi Bandung, Bandung 40132, Indonesia email: premadi@as.itb.ac.id
A. Sitti Maryam
Affiliation:
Department of Astronomy, Institut Teknologi Bandung, Bandung 40132, Indonesia email: premadi@as.itb.ac.id
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

This work is a preliminary result of our attempt to examine the use of SFR in the study of galaxy evolution. For this purpose we use the Sloan Digital Sky Survey Data Release 2 (SDSS DR2) Abazajian et al. (2004) and the SFR Catalogue generated from this data set by Brinchmann et al. (2004) and Kaufmann et al. (2003). Following Kewley et al. (2001) we use the Diagnostic Diagram, log ([OIII]/Hβ) vs log ([NII]/Hα), to separate the star forming galaxies from other emission lines sources such as AGN. Choosing only those with S/N > 3 out of the Brinchmann et al. (2004) catalogue, we arrive at about 200 thousand galaxies as our starting SFR subsample. With 0.05 < z < 0.22 and limit at r = 17.77, the subsample can be used to reconstruct the properties of a volume limited sample of galaxies with M* = 6 1010Modot. We benefit from the fact that Brinchmann et al. (2004) SFR Catalogue has already been aperture-corrected using the likelihood distribution P(SFR/Li/colour) scheme. For the environment, we use the data generated by Kaufmann et al. (2003), and arrive at about 40 thousand target galaxies. In this work the environment is characterised by the number (N=0-30) of neighbouring galaxies within a projected radius of 2 Mpc and velocity di.erence of 500km/s from each target galaxy, and the magnitude limit is 14.5 < r < 17.77.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

References

Abazajian, , 2004, AJ 128.CrossRefGoogle Scholar
Brinchmann, , 2004, MNRAS 351.CrossRefGoogle Scholar
Gomez, , 2002 ApJ, 584.Google Scholar
Kaufmann, , 2003 MNRAS, 341.Google Scholar
Kewley, , 2001 AJS, 132.Google Scholar
Strateva, , 2001, AJ 122.CrossRefGoogle Scholar