On the rotational behaviour of parent stars of extrasolar planets

Alves, S.; Nascimento Junior, Jose Ribamar Silva do; Medeiros, José Renan de

On the rotational behaviour of parent stars of extrasolar planets

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dc.contributor.author	Alves, S.
dc.contributor.author	Nascimento Junior, Jose Ribamar Silva do
dc.contributor.author	Medeiros, José Renan de
dc.date.accessioned	2020-06-01T01:53:40Z
dc.date.available	2020-06-01T01:53:40Z
dc.date.issued	2009
dc.description.resumo	We analysed the behaviour of the rotational velocity in the parent stars of extrasolar planets. Projected rotational velocity v sin i and angular momentum were combined with stellar and planetary parameters, for a unique sample of 147 stars, amounting to 184 extrasolar planets, including 25 multiple systems. Indeed, for the present working sample we considered only stars with planets detected by the radial-velocity procedure. Our analysis shows that the v sin i distribution of stars with planets along the HR diagram follows the well-established scenario for the rotation of intermediate to low main-sequence stars, with a sudden decline in rotation near 1.2 M⊙. The decline occurs around Teff∼ 6000 K, corresponding to the late-F spectral region. A statistical comparison of the distribution of the rotation of stars with planets and a sample of stars without planets indicates that the v sin i distribution for these two families of stars is drawn from the same population distribution function. We also found that the angular momentum of extrasolar planet parent stars follows, at least qualitatively, Kraft's relation J∝ (M/M⊙)α. The stars without detected planets show a clear trend of angular momentum deficit compared to the stars with planets, in particular for masses higher than about 1.25 M⊙. Stars with the largest mass planets tend to have angular momentum comparable to or higher than the Sun.	pt_BR
dc.identifier.citation	ALVES, S. ; NASCIMENTO JUNIOR, J. D. ; MEDEIROS, J. R. de. On the rotational behaviour of parent stars of extrasolar planets. Monthly Notices of the Royal Astronomical Society, v. 408, p. 1770-1777, 2010. Disponível em: https://academic.oup.com/mnras/article/408/3/1770/1075368. Acesso em: 18 Maio 2020. https://doi.org/10.1111/j.1365-2966.2010.17243.x	pt_BR
dc.identifier.doi	10.1111/j.1365-2966.2010.17243.x
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29114
dc.language	en	pt_BR
dc.publisher	Oxford University Press	pt_BR
dc.subject	Planetary systems	pt_BR
dc.subject	Stars - rotation	pt_BR
dc.title	On the rotational behaviour of parent stars of extrasolar planets	pt_BR
dc.type	article	pt_BR