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Date and Time of the Query: 2018-12-15 T00:52:30 PST
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For refcode 2010AJ....139..447H:
Retrieve 44 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2010AJ....139..447H Galex Ultraviolet Imaging of Dwarf Galaxies and Star Formation Rates Hunter, Deidre A.; Elmegreen, Bruce G.; Ludka, Bonnie C. Abstract. We present ultraviolet-integrated and azimuthally averaged surface photometric properties of a sample of 44 dwarf irregular (dIm), blue compact dwarf, and Sm galaxies measured from archival near-ultraviolet (NUV) and far-ultraviolet (FUV) images obtained with the Galaxy Evolution Explorer (GALEX). We compare the UV to H{alpha} and V-band properties and convert FUV, H{alpha}, and V-band luminosities into star formation rates (SFRs). We also model the star formation history from colors and compare the integrated SFRs and SFR profiles with radius for these methods. In most galaxies, the UV photometry extends beyond H{alpha} in radius, providing a better measure of the star formation activity in the outer disks. The H{alpha} appears to be lacking in the outer disk because of faintness in low-density gas. The FUV and V-band profiles are continuous with radius, although they sometimes have a kink from a double exponential disk. There is no obvious difference in star formation properties between the inner and outer disks. No disk edges have been observed, even to stellar surface densities as low as 0.1 M_sun_ pc^--2^ and SFRs as low as 10^--4^ M_sun_ yr^--1^ kpc^--2^. Galaxies with low H I to luminosity ratios have relatively low FUV compared to V-band emission in the outer parts, suggesting a cessation of star formation there. Galaxies with relatively high H I apparently have fluctuating star formation with a gigayear timescale. Key words: galaxies: dwarf, galaxies: photometry
Retrieve 44 NED objects in this reference.
Please click here for ADS abstract

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