Variable stars in the northeast arm/inner halo region of the Small Magellanic Cloud

Details Variable stars in the northeast arm/inner halo region of the Small Magellanic Cloud Variable stars in the northeast arm/inner halo region of the Small Magellanic Cloud

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104.1430s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 104, no. 4, p. 1430-1457, 1680-1683.

Astronomy and Astrophysics

Astronomy

43

Astronomical Photography, Globular Clusters, Magellanic Clouds, Star Distribution, Stellar Spectrophotometry, Variable Stars, Cepheid Variables, Light Curve, Stellar Luminosity

Scientific paper

Variable stars in a 1 x 1,3 deg region near the Northeast Arm of the SMC were photographically investigated. Large numbers of Cepheid variable stars were discovered in the NGC 361 field which were too faint to be found in previous variable star surveys. Cepheids with periods smaller than three days fall along one of two different P-L relations: those with lower amplitude, more symmetric light curves occupy the brighter sequences, while those with larger amplitudes and more asymmetric light curves fall along the fainter sequences. The slope of the log P-B relation derived from the fundamental mode Cepheids in the NGC 361 field is steeper than found in some prior studies of LMC and SMC Cepheids. Whereas RR Lyrae variables are distributed roughly evenly across the NGC 361 field, longer-period Cepheids are concentrated to the southern portion of the field, nearer to the main part of the Northeast Arm.

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