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AQ
Alice Quillen
Author with expertise in Stellar Astrophysics and Exoplanet Studies
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Cited Author
Open Access Advocate
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Upvotes received:
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Publications:
3
(100% Open Access)
Cited by:
1,187
h-index:
49
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i10-index:
144
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Publications
3
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The Frequency of Barred Spiral Galaxies in the Near-Infrared
Paul Eskridge
et al.
Feb 1, 2000
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.
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Galactic structure from binary pulsar accelerations: Beyond smooth models
Thomas Donlon
et al.
Jul 18, 2024
Geology
Astronomy And Astrophysics
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Geology
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