Hot Stuff for One Year (HSOY)

• Verfasst von: Altmann, Martin [VerfasserIn]
• Verfasst von: Röser, Siegfried [VerfasserIn]
• Verfasst von: Demleitner, Markus [VerfasserIn]
• Verfasst von: Bastian, Ulrich [VerfasserIn]
• Verfasst von: Schilbach, Elena [VerfasserIn]
• Titel: Hot Stuff for One Year (HSOY)
• Titelzusatz: a 583 million star proper motion catalogue derived from Gaia DR1 and PPMXL
• Verf.angabe: M. Altmann, S. Roeser, M. Demleitner, U. Bastian, and E. Schilbach
• Fussnoten: Gesehen am 24.10.2017
• Titel Quelle: Enthalten in: Astronomy and astrophysics
• Jahr Quelle: 2017
• Band/Heft Quelle: 600(2017) Artikel-Nummer L4, 5 Seiten
• ISSN Quelle: 1432-0746
• DOI: doi:10.1051/0004-6361/201730393
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1564701700

Abstract

<i>Context. <i/>Recently, the first installment of data from the ESA <i>Gaia <i/>astrometric satellite mission (<i>Gaia <i/>DR1) was released, containing positions of more than 1 billion stars with unprecedented precision. This release contains the proper motions and parallaxes, however, for only a subset of 2 million objects. The second release will include those quantities for most objects.<i>Aims. <i/>In order to provide a dataset that bridges the time gap between the <i>Gaia <i/>DR1 and <i>Gaia <i/>DR2 releases and partly remedies the lack of proper motions in the former, Hot Stuff for One Year (HSOY) was created as a hybrid catalogue between <i>Gaia <i/>and ground-based astrometry. This catalogue features proper motions (but no parallaxes) for a large percentage of the DR1 objects. While not attempting to compete with future <i>Gaia <i/>releases in terms of data quality or number of objects, the aim of HSOY is to provide improved proper motions partly based on <i>Gaia <i/>data and to allow studies to be carried out now or as pilot studies for later projects requiring higher precision data.<i>Methods. <i/>The HSOY catalogue was compiled using the positions taken from <i>Gaia <i/>DR1 combined with the input data from the PPMXL catalogue, employing the same weighted least-squares technique that was used to assemble the PPMXL catalogue itself.<i>Results. <i/>This effort resulted in a four-parameter astrometric catalogue containing 583 million stars with <i>Gaia <i/>DR1 quality positions and proper motions with precisions from far less than 1 mas/yr to 5 mas/yr, depending on object brightness and location on the sky.