Recent Star Formation in Nearby Galaxies from Galaxy Evolution Explorer Imaging: M101 and M51
- 17 January 2005
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 619 (1) , L71-L74
- https://doi.org/10.1086/422685
Abstract
The Galaxy Evolution Explorer (GALEX) Nearby Galaxies Survey is providing deep far-UV and near-UV imaging for a representative sample of galaxies in the local universe. We present early results for M51 and M101, from GALEX UV imaging and Sloan Digital Sky Survey optical data in five bands. The multiband photometry of compact stellar complexes in M101 is compared to population synthesis models, to derive ages, reddening, reddening-corrected luminosities, and current/initial masses. The GALEX UV photometry provides a complete census of young compact complexes on a ≈160 pc scale. A galactocentric gradient of the far-UV/near-UV color indicates younger stellar populations toward the outer parts of the galaxy disks, the effect being more pronounced in M101 than in M51.Keywords
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This publication has 16 references indexed in Scilit:
- TheGalaxy Evolution Explorer: A Space Ultraviolet Survey MissionThe Astrophysical Journal, 2005
- Stellar population synthesis at the resolution of 2003Monthly Notices of the Royal Astronomical Society, 2003
- The Composition Gradient in M101 Revisited. II. Electron Temperatures and Implications for the Nebular Abundance ScaleThe Astrophysical Journal, 2003
- Galactic Stellar and Substellar Initial Mass FunctionPublications of the Astronomical Society of the Pacific, 2003
- Far‐Ultraviolet and Hα Imaging of Nearby Spiral Galaxies: The OB Stellar Population in the Diffuse Ionized GasThe Astrophysical Journal, 2001
- Comparing Galaxy Morphology at Ultraviolet and Optical WavelengthsThe Astrophysical Journal Supplement Series, 2000
- Star Clusters in M33. III. The Youngest PopulationPublications of the Astronomical Society of the Pacific, 1999
- Ultraviolet Colors and Extinctions of HiiRegions in the Whirlpool Galaxy (M51)The Astrophysical Journal, 1997
- SExtractor: Software for source extractionAstronomy and Astrophysics Supplement Series, 1996
- The Extragalactic Distance Scale Key Project. III. The Discovery of Cepheids and a New Distance to M101 Using the Hubble Space TelescopeThe Astrophysical Journal, 1996