Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations
Kepler ultra-high precision photometry of long and continuous observations provides a unique dataset in which surface rotation and variability can be studied for thousands of stars. Because many of these old field stars also have independently measured asteroseismic ages, measurements of rotation an...
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Asteroseismology Stars - activity stars - rotation stars - solar-type stars - evolution stars - oscillations |
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Asteroseismology Stars - activity stars - rotation stars - solar-type stars - evolution stars - oscillations García, R. A. Ceillier, T. Salabert, D. Mathur, S. van Saders, J. L. Pinsonneault, M. Ballot, J. Beck, P. G. Bloemen, S. Campante, T. L. G. R., Davies Nascimento Júnior, José Dias do S., Mathis Metcalfe, T. S. M. B., Nielsen J. C., Suárez W. J., Chaplin A., Jiménez Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations |
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Kepler ultra-high precision photometry of long and continuous observations provides a unique dataset in which surface rotation and variability can be studied for thousands of stars. Because many of these old field stars also have independently measured asteroseismic ages, measurements of rotation and activity are particularly interesting in the context of age-rotation-activity relations. In particular, age-rotation relations generally lack good calibrators at old ages, a problem that this Kepler sample of old-field stars is uniquely suited to address. We study the surface rotation and photometric magnetic activity of a subset of 540 solar-like stars on the mainsequence and the subgiant branch for which stellar pulsations have been measured. The rotation period was determined by comparing the results from two di erent analysis methods: i) the projection onto the frequency domain of the time-period analysis, and ii) the autocorrelation function of the light curves. Reliable surface rotation rates were then extracted by comparing the results from two di erent sets of calibrated data and from the two complementary analyses. General photometric levels of magnetic activity in this sample of stars were also extracted by using a photometric activity index, which takes into account the rotation period of the stars.We report rotation periods for 310 out of 540 targets (excluding known binaries and candidate planet-host stars); our measurements span a range of 1 to 100 days. The photometric magnetic activity levels of these stars were computed, and for 61.5% of the dwarfs, this level is similar to the range, from minimum to maximum, of the solar magnetic activity.We demonstrate that hot dwarfs, cool dwarfs, and subgiants have very di erent rotation-age relationships, highlighting the importance of separating out distinct populations when interpreting stellar rotation periods. Our sample of cool dwarf stars with age and metallicity data of the highest quality is consistent with gyrochronology relations reported in the literature |
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article |
| author |
García, R. A. Ceillier, T. Salabert, D. Mathur, S. van Saders, J. L. Pinsonneault, M. Ballot, J. Beck, P. G. Bloemen, S. Campante, T. L. G. R., Davies Nascimento Júnior, José Dias do S., Mathis Metcalfe, T. S. M. B., Nielsen J. C., Suárez W. J., Chaplin A., Jiménez |
| author_facet |
García, R. A. Ceillier, T. Salabert, D. Mathur, S. van Saders, J. L. Pinsonneault, M. Ballot, J. Beck, P. G. Bloemen, S. Campante, T. L. G. R., Davies Nascimento Júnior, José Dias do S., Mathis Metcalfe, T. S. M. B., Nielsen J. C., Suárez W. J., Chaplin A., Jiménez |
| author_sort |
García, R. A. |
| title |
Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations |
| title_short |
Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations |
| title_full |
Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations |
| title_fullStr |
Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations |
| title_full_unstemmed |
Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations |
| title_sort |
rotation and magnetism of kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations |
| publisher |
EDP Sciences |
| publishDate |
2020 |
| url |
https://repositorio.ufrn.br/jspui/handle/123456789/29011 |
| work_keys_str_mv |
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ri-123456789-290112020-05-24T09:21:22Z Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations García, R. A. Ceillier, T. Salabert, D. Mathur, S. van Saders, J. L. Pinsonneault, M. Ballot, J. Beck, P. G. Bloemen, S. Campante, T. L. G. R., Davies Nascimento Júnior, José Dias do S., Mathis Metcalfe, T. S. M. B., Nielsen J. C., Suárez W. J., Chaplin A., Jiménez Asteroseismology Stars - activity stars - rotation stars - solar-type stars - evolution stars - oscillations Kepler ultra-high precision photometry of long and continuous observations provides a unique dataset in which surface rotation and variability can be studied for thousands of stars. Because many of these old field stars also have independently measured asteroseismic ages, measurements of rotation and activity are particularly interesting in the context of age-rotation-activity relations. In particular, age-rotation relations generally lack good calibrators at old ages, a problem that this Kepler sample of old-field stars is uniquely suited to address. We study the surface rotation and photometric magnetic activity of a subset of 540 solar-like stars on the mainsequence and the subgiant branch for which stellar pulsations have been measured. The rotation period was determined by comparing the results from two di erent analysis methods: i) the projection onto the frequency domain of the time-period analysis, and ii) the autocorrelation function of the light curves. Reliable surface rotation rates were then extracted by comparing the results from two di erent sets of calibrated data and from the two complementary analyses. General photometric levels of magnetic activity in this sample of stars were also extracted by using a photometric activity index, which takes into account the rotation period of the stars.We report rotation periods for 310 out of 540 targets (excluding known binaries and candidate planet-host stars); our measurements span a range of 1 to 100 days. The photometric magnetic activity levels of these stars were computed, and for 61.5% of the dwarfs, this level is similar to the range, from minimum to maximum, of the solar magnetic activity.We demonstrate that hot dwarfs, cool dwarfs, and subgiants have very di erent rotation-age relationships, highlighting the importance of separating out distinct populations when interpreting stellar rotation periods. Our sample of cool dwarf stars with age and metallicity data of the highest quality is consistent with gyrochronology relations reported in the literature Kepler ultra-high precision photometry of long and continuous observations provides a unique dataset in which surface rotation and variability can be studied for thousands of stars. Because many of these old field stars also have independently measured asteroseismic ages, measurements of rotation and activity are particularly interesting in the context of age-rotation-activity relations. In particular, age-rotation relations generally lack good calibrators at old ages, a problem that this Kepler sample of old-field stars is uniquely suited to address. We study the surface rotation and photometric magnetic activity of a subset of 540 solar-like stars on the mainsequence and the subgiant branch for which stellar pulsations have been measured. The rotation period was determined by comparing the results from two di erent analysis methods: i) the projection onto the frequency domain of the time-period analysis, and ii) the autocorrelation function of the light curves. Reliable surface rotation rates were then extracted by comparing the results from two di erent sets of calibrated data and from the two complementary analyses. General photometric levels of magnetic activity in this sample of stars were also extracted by using a photometric activity index, which takes into account the rotation period of the stars.We report rotation periods for 310 out of 540 targets (excluding known binaries and candidate planet-host stars); our measurements span a range of 1 to 100 days. The photometric magnetic activity levels of these stars were computed, and for 61.5% of the dwarfs, this level is similar to the range, from minimum to maximum, of the solar magnetic activity.We demonstrate that hot dwarfs, cool dwarfs, and subgiants have very di erent rotation-age relationships, highlighting the importance of separating out distinct populations when interpreting stellar rotation periods. Our sample of cool dwarf stars with age and metallicity data of the highest quality is consistent with gyrochronology relations reported in the literature 2020-05-19T18:19:13Z 2020-05-19T18:19:13Z 2014-09-24 article GARCÍA, R. A.; CEILLIER, T.; SALABERT, D.; MATHUR, S.; VAN SADERS, J. L.; PINSONNEAULT, M.; BALLOT, J.; BECK, P. G.; BLOEMEN, S.; CAMPANTE, T. L.. Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations. Astronomy & Astrophysics, [s.l.], v. 572, p. A34, 25 nov. 2014. Disponível em: http://dx.doi.org/10.1051/0004-6361/201423888. Acesso em: 12 mai. 2020. Com permissão da As“Reproduzidotronomy & Astrophysics, © ESO” 1678-765X 10.1051/0004-6361/201423888 https://repositorio.ufrn.br/jspui/handle/123456789/29011 en application/pdf EDP Sciences |