Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open Cluster
The determination of the astrophysical properties of stars remains challenging and frequently relies on the application of stellar models. Stellar sequences in nearby open clusters provide some of the best means to test and calibrate stellar evolutionary models and isochrones and to use these models...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astronomical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-3881/acb208 |
| _version_ | 1827827810050244608 |
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| author | Wolfgang Brandner Per Calissendorff Taisiya Kopytova |
| author_facet | Wolfgang Brandner Per Calissendorff Taisiya Kopytova |
| author_sort | Wolfgang Brandner |
| collection | DOAJ |
| description | The determination of the astrophysical properties of stars remains challenging and frequently relies on the application of stellar models. Stellar sequences in nearby open clusters provide some of the best means to test and calibrate stellar evolutionary models and isochrones and to use these models to assign astrophysical properties consistently to a large sample of stars. We aim at updating the single-star sequence of the members of the Hyades cluster, identifying the best-fitting isochrones, and determining the astrophysical properties of the stars. The Gaia Catalog of Nearby Stars provides a comprehensive sample of high-probability members of the Hyades cluster. We apply a multistep method to flag photometric outliers and to identify bona fide single stars and likely binary and multiple systems. The single stars define a tight sequence, which in the mass range 0.12–2.2 M _⊙ is well fitted by PARSEC isochrones for a supersolar metallicity of [M/H] = +0.18 ± 0.03 and an age of 775 ± 25 Myr. The isochrones enable us to assign mass, effective temperature, luminosity, and surface gravity to each of the 600 bona fide single main-sequence stars. The observed sequence validates the PARSEC isochrones. The derived stellar properties can serve as benchmarks for atmospheric and evolutionary models and for all-sky catalogs of stellar astrophysical properties. The stellar properties are also relevant for studies of exoplanet properties among Hyades exoplanet hosts. |
| first_indexed | 2024-03-12T03:37:47Z |
| format | Article |
| id | doaj.art-7519006d755544a0841587bd29b549ff |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-12T03:37:47Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-7519006d755544a0841587bd29b549ff2023-09-03T13:07:53ZengIOP PublishingThe Astronomical Journal1538-38812023-01-01165310810.3847/1538-3881/acb208Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open ClusterWolfgang Brandner0https://orcid.org/0000-0003-1939-6351Per Calissendorff1https://orcid.org/0000-0002-5335-0616Taisiya Kopytova2https://orcid.org/0000-0002-5723-9763Max-Planck-Institut für Astronomie Königstuhl 17 D-69117 Heidelberg , Germany ; brandner@mpia.deDepartment of Astronomy University of Michigan Ann Arbor , MI 4810, USAMax-Planck-Institut für Astronomie Königstuhl 17 D-69117 Heidelberg , Germany ; brandner@mpia.de; Ural Federal University Yekaterinburg 620002 , RussiaThe determination of the astrophysical properties of stars remains challenging and frequently relies on the application of stellar models. Stellar sequences in nearby open clusters provide some of the best means to test and calibrate stellar evolutionary models and isochrones and to use these models to assign astrophysical properties consistently to a large sample of stars. We aim at updating the single-star sequence of the members of the Hyades cluster, identifying the best-fitting isochrones, and determining the astrophysical properties of the stars. The Gaia Catalog of Nearby Stars provides a comprehensive sample of high-probability members of the Hyades cluster. We apply a multistep method to flag photometric outliers and to identify bona fide single stars and likely binary and multiple systems. The single stars define a tight sequence, which in the mass range 0.12–2.2 M _⊙ is well fitted by PARSEC isochrones for a supersolar metallicity of [M/H] = +0.18 ± 0.03 and an age of 775 ± 25 Myr. The isochrones enable us to assign mass, effective temperature, luminosity, and surface gravity to each of the 600 bona fide single main-sequence stars. The observed sequence validates the PARSEC isochrones. The derived stellar properties can serve as benchmarks for atmospheric and evolutionary models and for all-sky catalogs of stellar astrophysical properties. The stellar properties are also relevant for studies of exoplanet properties among Hyades exoplanet hosts.https://doi.org/10.3847/1538-3881/acb208Open star clustersStellar evolutionStellar dynamicsStellar colorsStellar effective temperaturesStellar luminosities |
| spellingShingle | Wolfgang Brandner Per Calissendorff Taisiya Kopytova Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open Cluster The Astronomical Journal Open star clusters Stellar evolution Stellar dynamics Stellar colors Stellar effective temperatures Stellar luminosities |
| title | Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open Cluster |
| title_full | Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open Cluster |
| title_fullStr | Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open Cluster |
| title_full_unstemmed | Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open Cluster |
| title_short | Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open Cluster |
| title_sort | astrophysical properties of 600 bona fide single stars in the hyades open cluster |
| topic | Open star clusters Stellar evolution Stellar dynamics Stellar colors Stellar effective temperatures Stellar luminosities |
| url | https://doi.org/10.3847/1538-3881/acb208 |
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