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The Age of the Sculptor Dwarf Spheroidal Galaxy from Imaging with WFPC2
- Source :
- Publications of the Astronomical Society of the Pacific. 111:1392-1397
- Publication Year :
- 1999
- Publisher :
- IOP Publishing, 1999.
-
Abstract
- From images taken with the Hubble Space Telescope's WFPC2, we have obtained photometry of a field in the Sculptor dwarf spheroidal galaxy to 3 mag below the main‐sequence turnoff. We determine an age equal to that of the earliest globular clusters for the bulk of the stars in our field of view. We attempt to constrain the star formation history of the Sculptor dwarf by examining the main‐sequence luminosity function. The presence of a half‐dozen blue straggler candidates blueward of the turnoff points to a possibly complex star formation history. However, the contribution of any intermediate‐age population is difficult to measure conclusively, because of the uncertain origin of blue stragglers and the sparseness of the photometric sample.
- Subjects :
- Physics
education.field_of_study
Star formation
Population
Astronomy
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Blue straggler
Dwarf spheroidal galaxy
Stars
Space and Planetary Science
Globular cluster
Elliptical galaxy
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
education
Astrophysics::Galaxy Astrophysics
Dwarf galaxy
Subjects
Details
- ISSN :
- 15383873 and 00046280
- Volume :
- 111
- Database :
- OpenAIRE
- Journal :
- Publications of the Astronomical Society of the Pacific
- Accession number :
- edsair.doi...........99d0d434ba07c88a91955d9f392e86e1