Stellar Spins in the Pleiades, Praesepe, and M35 Open Clusters
We analyze spectroscopic and photometric data to determine the projected inclinations of stars in three open clusters: the Pleiades, Praesepe, and M35. We determine the sin i values of 42, 35, and 67 stars in each cluster, respectively, and from their distributions we find that isotropic spins and m...
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| Vydáno v: | The Astrophysical journal Ročník 923; číslo 1; s. 23 - 39 |
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| Hlavní autoři: | , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
Philadelphia
The American Astronomical Society
01.12.2021
IOP Publishing |
| Témata: | |
| ISSN: | 0004-637X, 1538-4357 |
| On-line přístup: | Získat plný text |
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| Shrnutí: | We analyze spectroscopic and photometric data to determine the projected inclinations of stars in three open clusters: the Pleiades, Praesepe, and M35. We determine the
sin
i
values of 42, 35, and 67 stars in each cluster, respectively, and from their distributions we find that isotropic spins and moderate alignment are both consistent with the Pleiades and Praesepe data. While it is difficult to distinguish between these scenarios for a single cluster, an ensemble of such distributions may facilitate a distinction. The M35 inclination distribution is most consistent with a superposition of isotropic and anisotropic spins, the source of which could be systematic error or a physical grouping of aligned stars. We also study internal cluster kinematics using radial velocities and proper motions. Our kinematics analysis reveals significant plane-of-sky rotation in Praesepe, with a mean velocity of 0.132 ± 0.022 km s
−1
in a clockwise direction. |
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| Bibliografie: | Stars and Stellar Physics AAS33564 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 |
| ISSN: | 0004-637X 1538-4357 |
| DOI: | 10.3847/1538-4357/ac281d |