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Title: Non-gaussian statistics and stellar rotational velocities of main-sequence field stars
Authors: Carvalho, J. C.
Nascimento Jr., J. D. do
Silva, R.
Medeiros, José Renan de
Keywords: Stars: evolution;Stars: fundamental parameters;Stars: rotation;Stars: statistics
Issue Date: 2009
Publisher: American Astronomical Society
Citation: MEDEIROS, José Renan de. Non-Gaussian Statistics and Stellar Rotational Velocities of Main-Sequence Field Stars. The Astrophysical Journal, [s. l.], v. 696, p. L48-L51, 2009. ISSN 1538-4357 versão online. DOI Disponível em: Acesso em: 19 maio 2020.
Portuguese Abstract: In this Letter, we study the observed distributions of rotational velocity in a sample of more than 16,000 nearby F and G dwarf stars, magnitude complete, and presenting high-precision V sin i measurements. We show that the velocity distributions cannot be fitted by a Maxwellian. In addition, an analysis based on both Tsallis and Kaniadakis power-law statistics is by far the most appropriate statistics and gives a very good fit. It is also shown that single and binary stars have similar rotational distributions. This is the first time, to our knowledge, that these two new statistics have been tested for the rotation of such a large sample of stars, pointing solidly to a solution of the puzzling problem of the function governing the distribution of stellar rotational velocity.
ISSN: 0004-637X (print), 1538-4357 (online)
Appears in Collections:CCET - DFTE - Artigos publicados em periódicos

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