Normal A0-A1 stars with low v sin i

Creators: Royer, Frédéric; Gebran, M.; Monier, Richard; Hill, G. C.; Gulliver, A.; Adelman, S. J.; Smalley, B.; Pintado, O.; Reiners, Ansgar

Others:: Galaxies, Etoiles, Physique, Instrumentation (GEPI) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS); Physique stellaire et galactique ; Galaxies, Etoiles, Physique, Instrumentation (GEPI) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS); Notre Dame University-Louaize, Lebanon; Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) ; Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS); Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA); 18A Stratford St, Auckland, New Zealand; Department of Physics and Astronomy, Brandon University; Raytheon Co.; Astrophysics Group, Keele University; Instituto Superior de Correlación Geologica-CONICET; Institut für Astrophysik, Universität Göttingen; Mathys; Gautier; Griffin; Elizabeth R.; Kochukhov; Oleg; Monier; Richard; Wahlgren; Glenn M.

Description

Royer et al. (2007) studied a sample of A0-A1 stars that did not contain any previously known binary or chemically peculiar (CP) star. They showed that the distribution of the equatorial rotational velocities of the sample is bimodal. We report here the preliminary results of the abundance analysis of 47 of those ``normal'' A0-A1 main-sequence stars. The selection criterion was v sin i < 65 km/s. An hierarchical classification based on the abundances has supported the identification of new CP stars, while normal composition was confirmed the for 40 clean sample of normal A0-A1 stars with low v sin i was then examined for intrinsically slow rotators.

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Normal A0-A1 stars with low v sin i

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