Gaia 8

• Verfasst von: Bastian, Ulrich [VerfasserIn]
• Titel: Gaia 8
• Titelzusatz: discovery of a star cluster containing β Lyrae
• Verf.angabe: U. Bastian
• E-Jahr: 2019
• Jahr: 09 October 2019
• Umfang: 4 S.
• Fussnoten: Gesehen am 24.03.2020
• Titel Quelle: Enthalten in: Astronomy and astrophysics
• Ort Quelle: Les Ulis : EDP Sciences, 1969
• Jahr Quelle: 2019
• Band/Heft Quelle: 630(2019) Artikel-Nummer L8, 4 Seiten
• ISSN Quelle: 1432-0746
• DOI: doi:10.1051/0004-6361/201936595
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1693168618

Abstract

<i>Aims.<i/> The aim here is to try and clarify whether there are stars in the neighbourhood of <i>β<i/> Lyrae which are physically connected to the famous prototype eclipsing binary.<i>Methods.<i/> We scrutinised the astrometric and photometric data (from HIPPARCOS and <i>Gaia<i/> DR2) of stars in a limited sky field around <i>β<i/> Lyrae.<i>Results.<i/> A star cluster of about 100 members was discovered, nicely centred on <i>β<i/> Lyrae in five dimensions. There are clear indications that the newly discovered cluster belongs to a larger old (extinct) star formation complex, including two known star clusters and an extended, strewn field of stars at practically the same distance and space velocity.<i>Conclusions.<i/> This discovery opens up the possibility of determining a precise distance and precise age for <i>β<i/> Lyrae using the combined properties of the cluster members. This in turn may form an important basis for an improved astrophysical interpretation of the model binary <i>β<i/> Lyrae and its kin. The larger old star formation complex is of scientific interest in its own right.