Precise Age for the Binary Star System 12 Com in the Coma Berenices Cluster
dc.contributor.author | Lam, R | |
dc.contributor.author | Sandquist, EL | |
dc.contributor.author | Schaefer, GH | |
dc.contributor.author | Farrington, CD | |
dc.contributor.author | Monnier, JD | |
dc.contributor.author | Anugu, N | |
dc.contributor.author | Lanthermann, C | |
dc.contributor.author | Klement, R | |
dc.contributor.author | Ennis, J | |
dc.contributor.author | Setterholm, BR | |
dc.contributor.author | Gardner, T | |
dc.contributor.author | Kraus, S | |
dc.contributor.author | Davies, CL | |
dc.contributor.author | Orosz, JA | |
dc.date.accessioned | 2023-11-01T11:37:14Z | |
dc.date.issued | 2023-06-26 | |
dc.date.updated | 2023-10-31T23:19:09Z | |
dc.description.abstract | We present measurements of the interferometrically resolved binary star system 12 Com and the single giant star 31 Com in the cluster Coma Berenices. 12 Com is a double-lined spectroscopic binary system consisting of a G7 giant and an A3 dwarf at the cluster turnoff. Using an extensive radial velocity data set and interferometric measurements from the Palomar Testbed Interferometer and the Center for High Angular Resolution Astronomy array, we measured masses M 1 = 2.64 ± 0.07M ⊙ and M 2 = 2.10 ± 0.03M ⊙. Interferometry also allows us to resolve the giant and measure its size as R 1 = 9.12 ± 0.12 ± 0.01R ⊙. With the measured masses and radii, we find an age of 533 ± 41 ± 42 Myr. For comparison, we measure the radius of 31 Com to be 8.36 ± 0.15 R ⊙. Based on the photometry and radius measurements, 12 Com A is likely the most evolved bright star in the cluster, large enough to be in the red giant phase, but too small to have core helium burning. Simultaneous knowledge of 12 Com A’s mass and photometry puts strong constraints on convective core overshooting during the main-sequence phase, which in turn reduces systematic uncertainties in the age. Increased precision in measuring this system also improves our knowledge of the progenitor of the cluster white dwarf WD1216+260. | en_GB |
dc.description.sponsorship | European Research Council (ERC) | en_GB |
dc.description.sponsorship | Science and Technology Facilities Council (STFC) | en_GB |
dc.description.sponsorship | NASA-XRP | en_GB |
dc.description.sponsorship | NSF-AST | en_GB |
dc.description.sponsorship | NSF-ATI | en_GB |
dc.description.sponsorship | NSF-AST | en_GB |
dc.format.extent | 29- | |
dc.identifier.citation | Vol. 166(1), article 29 | en_GB |
dc.identifier.doi | https://doi.org/10.3847/1538-3881/accddb | |
dc.identifier.grantnumber | 101003096 | en_GB |
dc.identifier.grantnumber | ST/V000721/1 | en_GB |
dc.identifier.grantnumber | NNX16AD43G | en_GB |
dc.identifier.grantnumber | 1909165 | en_GB |
dc.identifier.grantnumber | 1506540 | en_GB |
dc.identifier.grantnumber | 1909165 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/134385 | |
dc.identifier | ORCID: 0000-0001-6017-8773 (Kraus, Stefan) | |
dc.identifier | ScopusID: 24481487500 (Kraus, Stefan) | |
dc.language.iso | en | en_GB |
dc.publisher | American Astronomical Society / IOP Publishing | en_GB |
dc.rights | © 2023. The Author(s). Published by the American Astronomical Society. Open access. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. | en_GB |
dc.title | Precise Age for the Binary Star System 12 Com in the Coma Berenices Cluster | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2023-11-01T11:37:14Z | |
dc.identifier.issn | 0004-6256 | |
exeter.article-number | ARTN 29 | |
dc.description | This is the final version. Available on open access from IOP Publishing via the DOI in this record | en_GB |
dc.identifier.eissn | 1538-3881 | |
dc.identifier.journal | The Astronomical Journal | en_GB |
dc.relation.ispartof | The Astronomical Journal, 166(1) | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2023-04-10 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2023-06-26 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2023-11-01T11:32:46Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2023-11-01T11:37:22Z | |
refterms.panel | B | en_GB |
refterms.dateFirstOnline | 2023-06-26 |
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Except where otherwise noted, this item's licence is described as © 2023. The Author(s). Published by the American Astronomical Society. Open access. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.