Pulsating B and Be stars in the Magellanic Clouds
| Autor: | Diago, P. D., Gutiérrez-Soto, J., Fabregat, J., Martayan, C., Suso, J. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Stellar pulsations in main-sequence B-type stars are driven by the $\kappa$-mechanism due to the Fe-group opacity bump. The current models do not predict the presence of instability strips in the B spectral domain at very low metallicities. As the metallicity of the Magellanic Clouds (MC) has been measured to be around $Z=0.002$ for the Small Magellanic Cloud (SMC) and $Z=0.007$ for the Large Magellanic Cloud (LMC), they constitute a very suitable objects to test these predictions. The aim of this work is to investigate the existence of B-type pulsators at low metallicities, searching for short-term periodic variability in a large sample of B and Be stars from the MC with accurately determined fundamental astrophysical parameters. Comment: 4 pages, 1 figure, contributed poster to the VIII Reuni\'on Cient\'ifica de la SEA 2008, Santander 7-11 July 2008 (v2 corrects a misprint in title) |
| Databáze: | arXiv |
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