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Ultraviolet imaging of old population in nearby galaxies
- Source :
- The Astrophysical Journal. 395:L45
- Publication Year :
- 1992
- Publisher :
- American Astronomical Society, 1992.
-
Abstract
- We analyze UV imagery of two Sb bulges and two E galaxies obtained with the Ultraviolet Imaging Telescope during the Astro-1 mission. The UV brightness of these systems is not produced by recent massive star formation. Instead it must originate in relatively low-luminosity objects, probably low-mass, post-giant-branch stars. We find extended, large-amplitude UV color gradients, which are probably related to abundance gradients within the galaxies. M32 has a color gradient opposite to the other three objects, possibly because of an intermediate-age population.
- Subjects :
- Physics
education.field_of_study
Spiral galaxy
Stellar population
Star formation
Population
Astronomy
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Galaxy
Space and Planetary Science
Bulge
Ultraviolet astronomy
Elliptical galaxy
Astrophysics::Solar and Stellar Astrophysics
education
Astrophysics::Galaxy Astrophysics
Subjects
Details
- ISSN :
- 15384357 and 0004637X
- Volume :
- 395
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi...........ac02615b0891a03883c73132857dc71d
- Full Text :
- https://doi.org/10.1086/186485