Multicolor photometry and spectrophotometry of star-forming complexes in spiral and irregular galaxies for analyses of star-formation parameters. Data and reductions

Details Multicolor photometry and spectrophotometry of star-forming complexes in spiral and irregular galaxies for analyses of star-formation parameters. Data and reductions Multicolor photometry and spectrophotometry of star-forming complexes in spiral and irregular galaxies for analyses of star-formation parameters. Data and reductions

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999arep...43..361s&link_type=abstract

Astronomy Reports, Volume 43, Issue 6, June 1999, pp.361-366

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Intermediate-band photometric measurements of star-forming complexes (SFCs) in six spiral and irregular galaxies are presented, and added to previously published multicolor data to form a master database. The old and new data have been reduced to a standard photometric system, and the accuracy of various color-index measurements compared. A total of 928 measurements of 569 SFCs in 49 galaxies are considered. The observed colors of SFCs-giant HII regions-in external galaxies are compared with theoretical (U_B)(B_V), LCI(U_B), and LCI(B_V) diagrams for a wide range of star-formation parameters (the observed colors were reduced to a single photometric system and corrected for extinction). The presence of observational selection effects in the data sample is demonstrated. The area occupied by theoretical evolutionary tracks is consistent with the observed distribution of colors for star-forming complexes.

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