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Title:
Change of splittings in Balloon 090100001
Authors:
Baran, A.; Oreiro, R.; Pigulski, A.; Pérez, F.; Ulla, A.; Garrido, R.; Rodríguez-Lopez, C.; Monserrat, T.; Fox Machado, L.; Gonzáles, J. M.; Reed, M.; Zhou, A.-Y.; Harms, S.; Eggen, J. R.; Kim, S-L.; Crowe, R.; Choo, K-J.; Chen, W-P.; Lee, H-T.; Huan, F-Y.; Siwak, M.; Kozie, D.; Zola, S.
Publication:
Communications in Astroseismology, Vol. 150, p.261 (CoAst Homepage)
Publication Date:
06/2007
Origin:
AASP
DOI:
10.1553/cia150s261
Bibliographic Code:
2007CoAst.150..261B

Abstract

We present the first results obtained during the multi-site campaign on the brightest pulsating sdB star Balloon 090100001. Our campaign was carried out in August and September 2005 spanning over 7 weeks. From the frequency analysis we confirm most of frequencies discovered during the 2004 campaign including an equidistant triplet and a quintuplet. The triplet and quintuplet have nearly the same separations, clearly indicating that rotational splitting might be involved. However, the splitting of multiplets increased by about 15% between 2004 and 2005. As far as we are aware, this is the first example of such a large change of frequency splitting in a pulsating star.

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