Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-11-15
Astrophys.J. 619 (2005) L71-L74
Astronomy and Astrophysics
Astrophysics
This paper will be published as part of the Galaxy Evolution Explorer (GALEX) Astrophysical Journal Letters Special Issue. Ful
Scientific paper
10.1086/422685
The GALEX (Galaxy Evolution Explorer) 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 SDSS optical data in five bands. The multi-band 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 approximately 160pc scale. A galactocentric gradient of the far-UV - near-UV color indicates younger stellar populations towards the outer parts of the galaxy disks, the effect being more pronounced in M101 than in M51.
Barlow Tom
Bianchi Luciana
Boissier Samuel
Burgarella Denis
Byun Yong-Ik.
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