Spectroscopy of blue and yellow long-period variables in the Small Magellanic Cloud

Details Spectroscopy of blue and yellow long-period variables in the Small Magellanic Cloud Spectroscopy of blue and yellow long-period variables in the Small Magellanic Cloud

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rmxac..26...74m&link_type=abstract

XI IAU Regional Latin American Meeting of Astronomy (Eds. L. Infante & M. Rubio) Revista Mexicana de Astronomía y Astrofísica (S

Astronomy and Astrophysics

Astronomy

1

Stars: Binaries: Eclipsing, Stars: Early-Type, Stars: Emission-Line, Be, Stars: Variable

Scientific paper

We present spectroscopy for 17 bright variable stars possible members of the Small Magellanic Cloud. These stars are OGLE variables whose photometric periodicity is poorly understood. We have determined spectral types and radial velocities for the stars of our sample. Most targets turned out to be emission-line objects of spectral type B-F and luminosity class giant or supergiant. From the analysis of the OGLE light curves, we find a new interacting eclipsing binary with a period of 184 days, and two new early-type ellipsoidal variables. The case of OGLE00445466-7328029 is specially interesting; this late-type Be star shows a beating phenomenon primarily caused by two closely spaced frequencies, 0.05733 c/d (17.44 d) and 0.06347 c/d (15.76 d). We discuss this case in particular.

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