Non-gaussian statistics and stellar rotational velocities of main-sequence field stars

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 ana...

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Principais autores:	Carvalho, J. C., Nascimento Jr., J. D. do, Silva, R., Medeiros, José Renan de
Formato:	article
Idioma:	English
Publicado em:	American Astronomical Society
Assuntos:	Stars: evolution Stars: fundamental parameters Stars: rotation Stars: statistics
Endereço do item:	https://repositorio.ufrn.br/jspui/handle/123456789/29028 http://dx.doi.org/10.1088/0004-637X/696/1/L48
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id	ri-123456789-29028
record_format	dspace
spelling	ri-123456789-290282022-10-20T20:07:26Z Non-gaussian statistics and stellar rotational velocities of main-sequence field stars Carvalho, J. C. Nascimento Jr., J. D. do Silva, R. Medeiros, José Renan de Stars: evolution Stars: fundamental parameters Stars: rotation Stars: statistics 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. 2020-05-19T23:04:39Z 2020-05-19T23:04:39Z 2009 article 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 https://doi.org/10.1088/0004-637X/696/1/L48. Disponível em: http://iopscience.iop.org/article/10.1088/0004-637X/696/1/L48/meta. Acesso em: 19 maio 2020. 0004-637X (print), 1538-4357 (online) https://repositorio.ufrn.br/jspui/handle/123456789/29028 http://dx.doi.org/10.1088/0004-637X/696/1/L48 en American Astronomical Society
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Stars: evolution Stars: fundamental parameters Stars: rotation Stars: statistics
spellingShingle	Stars: evolution Stars: fundamental parameters Stars: rotation Stars: statistics Carvalho, J. C. Nascimento Jr., J. D. do Silva, R. Medeiros, José Renan de Non-gaussian statistics and stellar rotational velocities of main-sequence field stars
description	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.
format	article
author	Carvalho, J. C. Nascimento Jr., J. D. do Silva, R. Medeiros, José Renan de
author_facet	Carvalho, J. C. Nascimento Jr., J. D. do Silva, R. Medeiros, José Renan de
author_sort	Carvalho, J. C.
title	Non-gaussian statistics and stellar rotational velocities of main-sequence field stars
title_short	Non-gaussian statistics and stellar rotational velocities of main-sequence field stars
title_full	Non-gaussian statistics and stellar rotational velocities of main-sequence field stars
title_fullStr	Non-gaussian statistics and stellar rotational velocities of main-sequence field stars
title_full_unstemmed	Non-gaussian statistics and stellar rotational velocities of main-sequence field stars
title_sort	non-gaussian statistics and stellar rotational velocities of main-sequence field stars
publisher	American Astronomical Society
publishDate	2020
url	https://repositorio.ufrn.br/jspui/handle/123456789/29028 http://dx.doi.org/10.1088/0004-637X/696/1/L48
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Non-gaussian statistics and stellar rotational velocities of main-sequence field stars

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