What is the True Fraction of Barred Spiral Galaxies?

Details What is the True Fraction of Barred Spiral Galaxies? What is the True Fraction of Barred Spiral Galaxies?

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ap%26ss.269..427e&link_type=abstract

Astrophysics and Space Science, v. 269/270, p. 427-430 (1999).

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

We have determined the fraction of barred galaxies in the H-band for a statistically well-defined sample of 186 spirals. At H, 56% of our sample is strongly barred, 16% is weakly barred, and only 27% is unbarred. The RC3 and the Carnegie Atlas of Galaxies both classify roughly 30% of our sample as strongly barred. Thus strong bars are nearly twice as prevalent in the H-band as in the optical. Roughly 40% of the galaxies in our sample that are classified as unbarred in the RC3 show evidence for a bar in the H-band; for the Carnegie Atlas the fraction is roughly 60%. We find no significant trend in bar fraction as a function of morphology, in either the optical or H-band.

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