Artículo
Abstract:
Aims. Rotational speed is an important physical parameter of stars, and knowing the distribution of stellar rotational velocities is essential for understanding stellar evolution. However, rotational speed cannot be measured directly and is instead the convolution between the rotational speed and the sine of the inclination angle v sin i. Methods. We developed a method to deconvolve this inverse problem and obtain the cumulative distribution function for stellar rotational velocities extending the work of Chandrasekhar & Münch (1950, ApJ, 111, 142) Results. This method is applied: a) to theoretical synthetic data recovering the original velocity distribution with a very small error; and b) to a sample of about 12.000 field main-sequence stars, corroborating that the velocity distribution function is non-Maxwellian, but is better described by distributions based on the concept of maximum entropy, such as Tsallis or Kaniadakis distribution functions. Conclusions. This is a very robust and novel method that deconvolves the rotational velocity cumulative distribution function from a sample of v sin i data in a single step without needing any convergence criteria. © ESO, 2014.
Registro:
| Documento: | Artículo |
| Título: | A method to deconvolve stellar rotational velocities |
| Autor: | Curé, M.; Rial, D.F.; Christen, A.; Cassetti, J. |
| Filiación: | Instituto de Física y Astronomía, Universidad de Valparaíso, 2340000 Valparaíso, Chile Departamento de Matemáticas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 428 Buenos Aires, Argentina Instituto de Estadística, Pontificia Universidad Católica de Valparaíso, 2362807 Valparaíso, Chile Universidad Nacional de General Sarmiento, 1613 Los Polvorines, Buenos Aires, Argentina |
| Palabras clave: | Methods:analytical; Methods:data analysis; Methods:numerical; Methods:statistical; Stars:fundamental parameters; Stars:rotation; Inverse problems; Numerical methods; Stars; Velocity; Velocity distribution; Methods: numericals; Methods:analytical; Methods:data analysis; Methods:statistical; Stars:fundamental parameters; Stars:rotation; Maximum entropy methods |
| Año: | 2014 |
| Volumen: | 565 |
| DOI: | http://dx.doi.org/10.1051/0004-6361/201323344 |
| Título revista: | Astronomy and Astrophysics |
| Título revista abreviado: | Astron. Astrophys. |
| ISSN: | 00046361 |
| CODEN: | AAEJA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v565_n_p_Cure |
Referencias:
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Citas:
---------- APA ----------
Curé, M., Rial, D.F., Christen, A. & Cassetti, J. (2014) . A method to deconvolve stellar rotational velocities. Astronomy and Astrophysics, 565.http://dx.doi.org/10.1051/0004-6361/201323344
---------- CHICAGO ----------
Curé, M., Rial, D.F., Christen, A., Cassetti, J. "A method to deconvolve stellar rotational velocities" . Astronomy and Astrophysics 565 (2014).http://dx.doi.org/10.1051/0004-6361/201323344
---------- MLA ----------
Curé, M., Rial, D.F., Christen, A., Cassetti, J. "A method to deconvolve stellar rotational velocities" . Astronomy and Astrophysics, vol. 565, 2014.http://dx.doi.org/10.1051/0004-6361/201323344
---------- VANCOUVER ----------
Curé, M., Rial, D.F., Christen, A., Cassetti, J. A method to deconvolve stellar rotational velocities. Astron. Astrophys. 2014;565.http://dx.doi.org/10.1051/0004-6361/201323344
