BVRI imaging of M 51-type pairs (Laurikainen+, 2000)

Details BVRI imaging of M 51-type pairs (Laurikainen+, 2000) BVRI imaging of M 51-type pairs (Laurikainen+, 2000)

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..41410103l&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/141/103. Originally published in: 2000A&AS..141..103L

Computer Science

Galaxies: Photometry, Photometry: Ubvri

Scientific paper

We present decompositions of azimuthally averaged surface brightness profiles in optical B, V, R and I-bands for a sample of 40 M 51-type interacting galaxies. The profiles were modelled by an exponential disk and a spherical bulge described either by the R1/4 law or by an exponential function. Half of the galaxies were well fitted by both bulge models, whereas for 35% the exponential function was a better choice. Special care was taken on eliminating superpositions of the companion galaxies. The mean B-band central surface brightness {mu}0was found to be 21.5mag/arcsec2, which is near to the value originally found by Freeman (1970ApJ...160..811F), but the scatter was fairly large. Galaxy interactions have strongly modified the disks in many of the galaxies in the sample. For example, six of them had extremely flat brightness profiles outside the exponential part of the disk, and many showed significant isophotal twists.
(4 data files).

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