Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/32024
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | DRIMMEL, Ronald | en_US |
dc.contributor.author | SOZZETTI, Alessandro | en_US |
dc.contributor.author | Schröder, Klaus-Peter | en_US |
dc.contributor.author | Bastian, Ulrich | en_US |
dc.contributor.author | Pinamonti, Matteo | en_US |
dc.contributor.author | Jack, Dennis | en_US |
dc.contributor.author | Hernández Huerta, Missael A. | en_US |
dc.date.accessioned | 2022-03-29T12:28:34Z | - |
dc.date.available | 2022-03-29T12:28:34Z | - |
dc.date.issued | 2021 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32024 | - |
dc.description.abstract | We present a spectroscopic characterization and a new orbital solution for the binary system β Cyg Aa/Ac (MCA 55), the primary component ( β Cyg A) of the well-known wide double star Albireo. By matching evolutionary tracks to the physical parameters of all three Albireo stars ( β Cyg Aa, Ac, and B) as obtained from a spectroscopic analysis of TIGRE and IUE spectra, we confirm that they are likely coeval. Our final orbit solution is based on radial-velocity measurements taken over a baseline exceeding 120 yr, combined with relative astrometry from speckle interferometric observations and the absolute astrometry from the Hipparcos and Gaia missions. Our final orbit solution has a period of 121.65 $^{+3.34}_{-2.90}$ yr with an eccentricity of 0.20 $^{+0.01}_{-0.02}$ . Thanks to the inclusion of the absolute astrometry, we find a mass ratio of $q = 1.25^{+0.19}_{-0.17}$ , and a total mass of $9.47_{-3.24}^{+5.88}$ M<SUB>⊙</SUB>, indicating that the secondary (Ac) is the more massive of the pair. These results strongly suggest the presence of a fourth, unseen, member of the Albireo system. Given the current photometric data, it is likely that β Cyg A is itself a hierarchical triple. We also derive the systemic proper motion, line-of-sight velocity, and an orbital parallax of the β Cyg A system, allowing us to quantitatively assess the hypothesis that Albireo A and B form a physically bound and genealogically connected system. Finally, we find four potential members of a common proper motion group with Albireo, though none anywhere as close by as the Albireo components A to B. | en_US |
dc.language.iso | eng | en_US |
dc.title | A celestial matryoshka: dynamical and spectroscopic analysis of the Albireo system | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/staa4038 | en_US |
dc.identifier.scopus | 2-s2.0-85117340425 | en_US |
dc.identifier.url | http://arxiv.org/abs/2012.01277v2 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/502/1/328/6089143?login=true | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 502 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 328 | en_US |
dc.relation.lastpage | 350 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2021MNRAS.502..328D | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.orcid | 0000-0002-1777-5502 | - |
crisitem.author.orcid | 0000-0002-7504-365X | - |
crisitem.author.orcid | 0000-0002-4445-1845 | - |
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