New suns in the new cosmos?
The present work reports on the discovery of three stars that we have identified to be rotating Sun-like stars, basedon rotational modulation signatures inferred from light curves from the CoRoT mission’s Public Archives. In ouranalysis, we performed an initial selection based on the rotation period...
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ri-123456789-293672020-06-28T07:40:46Z New suns in the new cosmos? Martins, Bruno Leonardo Canto Freitas, D. B. de Leão, I. C. Lopes, C. E. Ferreira Paz-Chinchon, F. Alves, S. Medeiros, J. R. de Methods: data analysis Stars: rotation Stars: solar-type Stars: variables: general Sun: rotation Online-only material: color figure The present work reports on the discovery of three stars that we have identified to be rotating Sun-like stars, basedon rotational modulation signatures inferred from light curves from the CoRoT mission’s Public Archives. In ouranalysis, we performed an initial selection based on the rotation period and position in the period–Teff diagram. This revealed that the stars CoRoT IDs 100746852, 102709980, and 105693572 provide potentially good matches to the Sun with a similar rotation period. To refine our analysis, we applied a novel procedure, taking into account the fluctuations of the features associated with photometric modulation at different time intervals and the fractality traces that are present in the light curves of the Sun and of these “New Sun” candidates alike. In this sense, we computed the so-called Hurst exponent for the referred stars, for a sample of 14 CoRoT stars with sub- and super-solar rotational periods, and for the Sun itself in its active and quiet phases. We found that the Hurst exponent can provide a strong discriminant of Sun-like behavior, going beyond what can be achieved with solely the rotation period itself. In particular, we find that CoRoT ID 105693572 is the star that most closely matches the solar rotation properties as far as the latter’s imprints on light curve behavior are concerned. The stars CoRoT IDs 100746852 and 102709980 have significant smaller Hurst exponents than the Sun, notwithstanding their similarity in rotation periods. 2020-06-25T23:30:06Z 2020-06-25T23:30:06Z 2013-07-31 article MARTINS, Bruno Leonardo Canto et al. New suns in the cosmos? The Astrophysical Journal, [s. l.], v. 773, n. 2, p. L18 (6pp), 31 jul. 2013. ISSN 2041-8213. DOI http://dx.doi.org/10.1088/2041-8205/773/2/l18. Disponível em: https://iopscience.iop.org/article/10.1088/2041-8205/773/2/L18. Acesso em: 25 jun. 2020. 2041-8205 (print), 2041-8213 (online) https://repositorio.ufrn.br/jspui/handle/123456789/29367 http://dx.doi.org/10.1088/2041-8205/773/2/l18 pt_BR application/pdf American Astronomical Society |
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pt_BR |
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Methods: data analysis Stars: rotation Stars: solar-type Stars: variables: general Sun: rotation Online-only material: color figure |
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Methods: data analysis Stars: rotation Stars: solar-type Stars: variables: general Sun: rotation Online-only material: color figure Martins, Bruno Leonardo Canto Freitas, D. B. de Leão, I. C. Lopes, C. E. Ferreira Paz-Chinchon, F. Alves, S. Medeiros, J. R. de New suns in the new cosmos? |
| description |
The present work reports on the discovery of three stars that we have identified to be rotating Sun-like stars, basedon rotational modulation signatures inferred from light curves from the CoRoT mission’s Public Archives. In ouranalysis, we performed an initial selection based on the rotation period and position in the period–Teff diagram. This revealed that the stars CoRoT IDs 100746852, 102709980, and 105693572 provide potentially good matches to the Sun with a similar rotation period. To refine our analysis, we applied a novel procedure, taking into account the fluctuations of the features associated with photometric modulation at different time intervals and the fractality traces that are present in the light curves of the Sun and of these “New Sun” candidates alike. In this sense, we computed the so-called Hurst exponent for the referred stars, for a sample of 14 CoRoT stars with sub- and super-solar rotational periods, and for the Sun itself in its active and quiet phases. We found that the Hurst exponent can provide a strong discriminant of Sun-like behavior, going beyond what can be achieved with solely the rotation period itself. In particular, we find that CoRoT ID 105693572 is the star that most closely matches the solar rotation properties as far as the latter’s imprints on light curve behavior are concerned. The stars CoRoT IDs 100746852 and 102709980 have significant smaller Hurst exponents than the Sun, notwithstanding their similarity in rotation periods. |
| format |
article |
| author |
Martins, Bruno Leonardo Canto Freitas, D. B. de Leão, I. C. Lopes, C. E. Ferreira Paz-Chinchon, F. Alves, S. Medeiros, J. R. de |
| author_facet |
Martins, Bruno Leonardo Canto Freitas, D. B. de Leão, I. C. Lopes, C. E. Ferreira Paz-Chinchon, F. Alves, S. Medeiros, J. R. de |
| author_sort |
Martins, Bruno Leonardo Canto |
| title |
New suns in the new cosmos? |
| title_short |
New suns in the new cosmos? |
| title_full |
New suns in the new cosmos? |
| title_fullStr |
New suns in the new cosmos? |
| title_full_unstemmed |
New suns in the new cosmos? |
| title_sort |
new suns in the new cosmos? |
| publisher |
American Astronomical Society |
| publishDate |
2020 |
| url |
https://repositorio.ufrn.br/jspui/handle/123456789/29367 http://dx.doi.org/10.1088/2041-8205/773/2/l18 |
| work_keys_str_mv |
AT martinsbrunoleonardocanto newsunsinthenewcosmos AT freitasdbde newsunsinthenewcosmos AT leaoic newsunsinthenewcosmos AT lopesceferreira newsunsinthenewcosmos AT pazchinchonf newsunsinthenewcosmos AT alvess newsunsinthenewcosmos AT medeirosjrde newsunsinthenewcosmos |
| _version_ |
1745767588802068480 |