We study the rotation-activity relationship for low-mass members of the young cluster h Persei, a ~13 Myr old cluster. h Per, thanks to its age, allows us to link the rotation-activity relation observed for main-sequence stars to the still unexplained activity levels of very young clusters. We constrained the activity levels of h Per members by analyzing a deep Chandra/ACIS-I observation pointed to the central field of h Per. We combined this X-ray catalog with the catalog of h Per members with measured rotational period, presented by Moraux et al. (2013). We obtained a final catalog of 202 h Per members with measured X-ray luminosity and rotational period. We investigate the rotation-activity relation of h Per members considering different mass ranges. We find that stars with 1.3 M⊙ > M 1.4 M⊙ show significant evidence of supersaturation for short periods. This phenomenon is instead not observed for lower mass stars.

Argiroffi, C., Caramazza, M., Micela, G., Moraux, E., Bouvier, J. (2014). Activity and Rotation in the Young Cluster h Per. In Magnetic Fields throughout Stellar Evolution, Proceedings of the International Astronomical Union, IAU Symposium, Volume 302. Cambridge University Press [10.1017/S1743921314001811].

Activity and Rotation in the Young Cluster h Per

ARGIROFFI, Costanza;
2014-01-01

Abstract

We study the rotation-activity relationship for low-mass members of the young cluster h Persei, a ~13 Myr old cluster. h Per, thanks to its age, allows us to link the rotation-activity relation observed for main-sequence stars to the still unexplained activity levels of very young clusters. We constrained the activity levels of h Per members by analyzing a deep Chandra/ACIS-I observation pointed to the central field of h Per. We combined this X-ray catalog with the catalog of h Per members with measured rotational period, presented by Moraux et al. (2013). We obtained a final catalog of 202 h Per members with measured X-ray luminosity and rotational period. We investigate the rotation-activity relation of h Per members considering different mass ranges. We find that stars with 1.3 M⊙ > M 1.4 M⊙ show significant evidence of supersaturation for short periods. This phenomenon is instead not observed for lower mass stars.
Settore FIS/05 - Astronomia E Astrofisica
Magnetic Fields throughout Stellar Evolution, IAU Symposium 302
2014
4
http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9314707&fileId=S1743921314001811
Argiroffi, C., Caramazza, M., Micela, G., Moraux, E., Bouvier, J. (2014). Activity and Rotation in the Young Cluster h Per. In Magnetic Fields throughout Stellar Evolution, Proceedings of the International Astronomical Union, IAU Symposium, Volume 302. Cambridge University Press [10.1017/S1743921314001811].
Proceedings (atti dei congressi)
Argiroffi, C; Caramazza, M; Micela, G; Moraux, E; Bouvier, J
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/100544
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