Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aj....126..237k&link_type=abstract
The Astronomical Journal, Volume 126, Issue 1, pp. 237-246.
Astronomy and Astrophysics
Astronomy
4
Galaxies: Individual: Name: Large Magellanic Cloud, Galaxies: Star Clusters- Galaxies: Magellanic Clouds, Techniques: Photometric
Scientific paper
The field of the moderately old open cluster LW 55 in the outer parts of the Large Magellanic Cloud disk was monitored for detection of short-period variable stars over two nights. Eight variables were found; all but one (a detached eclipsing binary) are small-amplitude (ΔV<=0.1 mag) pulsating stars of the δ Scuti, SX Phoenicis, or γ Doradus type. The BV color-magnitude diagram extends down to the solar-type stars at V=24 (MV~=5.2). The cluster age is estimated at 1.5 Gyr for Z=0.004 ([Fe/H]=-0.67) the surrounding stellar field is older, with an age greater than 4 Gyr.
Based on data obtained at Las Campanas Observatory, operated by the Carnegie Institution of Washington, during the University of Toronto time allocation.
Kaluzny Janusz
Rucinski Slavek M.
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