SIMBAD references

1996A&AS..120..207P - Astron. Astrophys., Suppl. Ser., 120, 207-228 (1996/December-1)

Optical structure and star formation in blue compact dwarf galaxies. I. Observations and profile decomposition.


Abstract (from CDS):

We present new B and R CCD surface photometry for a sample of 4 Blue Compact Dwarf Galaxies (BCDs) and 2 higher luminosity starburst galaxies. We find that the BCD surface brightness profiles (SBPs) can be generally well fitted by the sum of the light of 3 distinct components: 1) an exponential component at large radii, with or without a central flattening which describes the underlying older stellar population; 2) a plateau component at intermediate radii and 3) a gaussian component at small radii. The last 2 components describe the ongoing starburst superimposed on the older stellar component. We apply the 3-component decomposition scheme to 8 more BCDs from the literature and, for the total sample of 14 galaxies, derive structural properties such as central surface brightness and scale length, and perform a deprojection to obtain the luminosity density distribution for each component. We also derive B-R color profiles and find that BCDs show generally a reddening outwards, followed by a blueing beyond a transition radius.

Abstract Copyright:

Journal keyword(s): galaxies: compact - photometry - structure - fundamental parameters

CDS comments: Table 2: NGC 2195 misprint for 2915?

Simbad objects: 7

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