HST imaging of the Large Magellanic Cloud: The field-star population near 30 Doradus

Details HST imaging of the Large Magellanic Cloud: The field-star population near 30 Doradus HST imaging of the Large Magellanic Cloud: The field-star population near 30 Doradus

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106..632e&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 106, no. 700, p. 632-641

Astronomy and Astrophysics

Astronomy

11

Color-Magnitude Diagram, Giant Stars, Magellanic Clouds, Main Sequence Stars, Satellite-Borne Photography, Stellar Spectra, Cameras, Data Processing, Galactic Halos, Hubble Space Telescope, Imaging Techniques, Metallicity, Spiral Galaxies, Stellar Magnitude, Stellar Spectrophotometry

Scientific paper

We present deep color-magnitude diagrams for two fields in the Large Magellanic Cloud (LMC), located about 6 arcmin from 30 Doradus. The data are from images taken with the Hubble Space Telescope's (HST) Wide Field Camera (WFC), as part of the Medium Deep Survey (MDS) Key Project. We describe a procedure for measuring stellar magnitudes in relatively crowded HST images based on aperture corrections. This procedure is used to obtain color-magnitude diagrams containing a total of approximately 7200 stars with 18 less than V less than 24. The color-magnitude diagrams show a well-populated main sequence, and a pronounced giant branch concentrated at V approximately equal 20. There is tentative evidence for a population of low-metallicity main-sequence stars, which may confirm the suggestion that the LMC has, like spiral galaxies, a metal-poor, spheroidal component.

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