========================================================================== J/ApJ/703/614 UV star-forming regions in M31 (Kang+, 2009) The following files can be converted to FITS (extension .fit or fit.gz) table2.dat ========================================================================== Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/703/614 ==========================================================================
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Beginning of ReadMe : J/ApJ/703/614 UV star-forming regions in M31 (Kang+, 2009) ================================================================================ An ultraviolet study of star-forming regions in M31. Kang Y., Bianchi L., Rey S.-C. <Astrophys. J., 703, 614-627 (2009)> =2009ApJ...703..614K ================================================================================ ADC_Keywords: Photometry, ultraviolet ; Galaxies, nearby ; YSOs Keywords: galaxies: evolution - galaxies: individual (M31) - galaxies: star clusters - galaxies: structure - stars: early-type - ultraviolet: galaxies - ultraviolet: stars Abstract: We present a comprehensive study of star-forming (SF) regions in the nearest large spiral galaxy M31. We use Galaxy Evolution Explorer (GALEX) far-UV (1344-1786AA, FUV) and near-UV (1771-2831AA, NUV) imaging to detect young massive stars and trace the recent star formation across the galaxy. The FUV and NUV flux measurements of the SF regions, combined with ground-based data for estimating the reddening by interstellar dust from the massive stars they contain, are used to derive their ages and masses. The GALEX imaging, combining deep sensitivity and coverage of the entire galaxy, provides a complete picture of the recent star formation in M31 and its variation with environment throughout the galaxy. The FUV and NUV measurements are sensitive to detect stellar populations younger than a few hundred Myr. We detected 894 SF regions, with size >=1600pc^2^ above an average FUV flux limit of 26ABmag/arcsecond^2^, over the whole 26kpc (radius) galaxy disk. We derive the star formation history of M31 within this time span. The star formation rate (SFR) from the youngest UV sources (age <=10Myr) is comparable to that derived from Halpha, as expected. Description: We considered 20 fields from the GALEX fourth data release (GR4). The GR4 data are processed with a pipeline processing system inaugurated in late 2007. GALEX observed the disk region of M31 as part of the Nearby Galaxies Survey (NGS, Bianchi et al. 2003lgal.conf...10B). Finally, we selected seven GALEX fields covering the entire disk region (see Figure 1).