Optical Multi-Band Analyses of Blue Compact Dwarf Galaxies

Details Optical Multi-Band Analyses of Blue Compact Dwarf Galaxies Optical Multi-Band Analyses of Blue Compact Dwarf Galaxies

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ap%26ss.276..901n&link_type=abstract

Astrophysics and Space Science, v. 276, Issue 2/4, p. 901-908 (2001).

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

We are currently analysing image data for a large sample of blue compact dwarf galaxies (BCDs), obtained in multiple optical broad- and narrow-band filters. We present preliminary results of a multi-band analysis of two typical BCDs, Mrk 5 and I Zw 123, for which surface-brightness profiles, colour profiles, colour maps and H_α equivalent-width maps have been derived. We demonstrate how a combination of these different processing methods allows a separate analysis of the young and old stellar populations with respect to their colours and spatial distributions. By comparing the derived colours with the predictions of evolutionary synthesis models, we estimate ages of the distinct stellar populations. The surface-brightness profiles of Mrk 5 show an exponential decay at large photometric radii, with slopes typically found for BCDs. In the case of the very compact object I Zw 123, the surface-brightness profile of the underlying stellar component can be described either by an exponential or an R^1/4} law. We discuss briefly how noise effects can influence the intrinsic slope of surface brightness profiles at low surface-brightness levels. For compact objects with extended starbursts, the study of the underlying stellar population can thereby be rendered difficult.

Affiliated with

Also associated with

No associations

Rating

Optical Multi-Band Analyses of Blue Compact Dwarf Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Optical Multi-Band Analyses of Blue Compact Dwarf Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical Multi-Band Analyses of Blue Compact Dwarf Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1005492