The Frequency of Barred Spiral Galaxies in the Near-Infrared

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Title: The Frequency of Barred Spiral Galaxies in the Near-Infrared
Creators: Eskridge, Paul B.; Frogel, Jay A.; Pogge, Richard W.; Quillen, Alice C.; Davies, Roger L.; DePoy, D. L.; Houdashelt, Mark L.; Kuchinski, Leslie E.; Ramírez, Solange V.; Sellgren, K.; Terndrup, Donald M.; Tiede, Glenn P.
Keywords: galaxies: fundamental parameters
galaxies: spiral
galaxies: statistics
galaxies: structure
Issue Date: 2000-02
Publisher: American Astronomical Society
Citation: Paul B. Eskridge et al, "The Frequency of Barred Spiral Galaxies in the Near-Infrared," The Astronomical Journal 119, no. 2 (2000), doi:10.1086/301203
DOI: 10.1086/301203
Abstract: We have determined the fraction of barred galaxies in the H-band for a statistically well-defined sample of 186 spirals drawn from the Ohio State University Bright Spiral Galaxy Survey. We find 56% of our sample to be strongly barred in the H band while another 16% is weakly barred. Only 27% of our sample is unbarred in the near-infrared. The RC3 and the Carnegie Atlas of Galaxies both classify only about 30% of our sample as strongly barred. Thus strong bars are nearly twice as prevalent in the near-infrared as in the optical. The frequency of genuine optically hidden bars is significant but lower than many claims in the literature: 40% of the galaxies in our sample that are classified as unbarred in the RC3 show evidence for a bar in the H band while the Carnegie Atlas lists this fraction as 66%. Our data reveal no significant trend in bar fraction as a function of morphology in either the optical or H band. Optical surveys of high-redshift galaxies may be strongly biased against finding bars, as bars are increasingly difficult to detect at bluer rest wavelengths.
ISSN: 1538-3881
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