B and R CCD surface photometry of late-type galaxies

Details B and R CCD surface photometry of late-type galaxies B and R CCD surface photometry of late-type galaxies

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...341..725s&link_type=abstract

Astronomy and Astrophysics, v.341, p.725-739 (1999)

Astronomy and Astrophysics

Astrophysics

9

Galaxies: Photometry, Galaxies: Irregular, Galaxies: Fundamental Parameters, Galaxies: Compact

Scientific paper

We present B and R CCD observations of 16 late-type galaxies, mainly Magellanic irregulars and blue compact galaxies, at a limiting surface brightness of mu_ {B} ~ 26-27 mag arcsec(-2) . The sample is derived from a H I-rich subset of an H I survey of late-type dwarfs and consists of objects with -19.5<=MB<=-14.4, nine galaxies being fainter than MB=-17 (H0=75 km s(-1) Mpc(-1) ). Radial luminosity distributions for all the sample objects are presented. We find that the blue compacts become redder in (B-R) with increasing distances from their centres confirming other studies indicating that recent star formation in these galaxies may be centrally concentrated. The Im and Sm galaxies show flatter (B-R) colour profiles indicating less centrally concentrated recent star formation. The majority of the galaxies have an identifiable exponential disk while half also have a central bulge.

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