A photometric study of 11 massive stars in the Magellanic Clouds

A.M. van Genderen$^1$ and C. Sterken$^2,3$

1 - Leiden Observatory, Postbus 9513, NL-2300RA Leiden, The Netherlands;
2 - Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
3 - Research Director, Fund for Scientific Research (FWO), Belgium

We present and discuss $VBLUW$ photometry of eleven massive stars in the Magellanic Clouds: the SMC stars AzV\,121, AzV\,136 = HD\,5277 = R\,10, AzV\,197, AzV\,310 = R\,26 and AzV\,369, and the LMC stars GV\,80 = HD\,32034 = R\,62, GV\,91 = HDE\,268\,819, GV\,346 = HDE\,269\,661 = R\,111, GV\,352 = HDE\,269\,697, GV\,423 = HDE\,269\,953 = R\,150 and GV\,460 = HDE\,270\,111. Only one G0\,Ia SMC supergiant is found to be variable, whereas all members of the LMC sample show definite variability. We find that roughly above M/M$_{\sun}$ = 25, supergiants become photometrically unstable. The reddening-independent metal-index $[B-L]$ is used to investigate the metallicity of late-type supergiants in both galaxies relative to similar supergiants in the solar neighbourhood.

Reference: Astronomische Nachrichten (AN), in press
Status: Manuscript has been accepted



Email: genderen@strw.leidenuniv.nl