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http://hdl.handle.net/20.500.12386/27328
Titolo: | Multiple kinematical populations in Vela OB2 from Gaia DR1 data | Autori: | DAMIANI, Francesco PRISINZANO, Loredana Jeffries, R. D. SACCO, GIUSEPPE GERMANO RANDICH, Maria Sofia MICELA, Giuseppina |
Data pubblicazione: | 2017 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 602 | Da pagina:: | L1 | Abstract: | Context. Recent results using radial-velocity measurements from the Gaia-ESO Survey have led to the discovery of multiple kinematic populations across the Vela OB2 association. We present here a proper-motion study of the same region. <BR /> Aims: Our aim is to test whether or not the radial-velocity populations have a counterpart in proper-motion space, and if so, how the two sets of kinematical data complement each other. <BR /> Methods: This work is based on parallaxes and proper motions from the TGAS catalogue, as part of Gaia DR1. <BR /> Results: Two distinct proper-motion populations are found dispersed across 5 degrees (or 30 pc at their likely distances). Their detailed correspondence to the radial-velocity populations could not be tested because of the paucity of common objects. However, compelling indications are found that one of the new proper-motion populations consists mostly of members of the young cluster NGC 2547, and the other is related to the γ<SUP>2</SUP> Vel cluster. Constraints on the age of the two populations, both of which appear to be only 10-35 Myr old, and their possible mutual interactions within the last 1.5 Myr are discussed. | URI: | http://hdl.handle.net/20.500.12386/27328 | URL: | http://arxiv.org/abs/1705.03816v1 https://www.aanda.org/articles/aa/abs/2017/06/aa30867-17/aa30867-17.html |
ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201730867 | Bibcode ADS: | 2017A&A...602L...1D | Fulltext: | open |
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