1. Gaia Data Release 2: Summary of the variability processing & analysis results
- Author
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László Molnár, I. Pagano, László Szabados, G. Busso, Richard I. Anderson, Shay Zucker, Marcella Marconi, P. Koubsky, L. M. Sarro, Lorenzo Rimoldini, Andrej Prsa, Viktor Votruba, Leanne P. Guy, M. Riello, A. Kochoska, Vincenzo Ripepi, Gisella Clementini, M. López, Tsevi Mazeh, S. Regibo, M. Grenon, F. Glass, G. Marschalkó, S. Messina, J. De Ridder, K. Nienartowicz, L. Eyer, J. Charnas, Tatiana Muraveva, André Moitinho, S. Morgenthaler, L. Palaversa, D. W. Evans, O. Marchal, Marc Audard, Sergi Blanco-Cuaresma, Ilaria Musella, Conny Aerts, Michał Pawlak, A. Garofalo, Á. L. Juhász, D. Ordonez, Isabelle Lecoeur-Taïbi, Antonino F. Lanza, E. Distefano, B. Holl, A. C. Lanzafame, Maria Süveges, G. Jevardat de Fombelle, C. Ordénovic, J. Cuypers, T. Lebzelter, Nami Mowlavi, Emese Plachy, Francois Mignard, Maroussia Roelens, F. De Angeli, F. Barblan, Roberto Molinaro, Silvio Leccia, D. Lorenz, A. Panahi, E. Szegedi-Elek, Heckscher-Klinikum, ISDC Data Centre for Astrophysics, University of Geneva [Switzerland], Galaxies, Etoiles, Physique, Instrumentation (GEPI), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Instituut voor Sterrenkunde [Leuven], Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Aberystwyth University, Laboratory of the Institute for Fiscal Studies (IFS), Institute for Fiscal Studies, INAF - Osservatorio Astrofisico di Catania (OACT), Istituto Nazionale di Astrofisica (INAF), Département Réseaux, Information, Multimédia (RIM-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Centre G2I, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Laboratoire d'études dynamiques et structurales de la sélectivité (LEDSS), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Istituto Nazionale di Astrofisica (Istituto Nazionale di Astrofisica), Istituto Nazionale di Fisica Nucleare (INFN), INAF - Osservatorio Astronomico di Capodimonte (OAC), Universidad Nacional de Educación a Distancia (UNED), Case Western Reserve University [Cleveland], Institute of Astronomy [Cambridge], University of Cambridge [UK] (CAM), Royal Observatory of Belgium [Brussels] (ROB), Observatoire Astronomique de l'Université de Genève (ObsGE), Université de Genève (UNIGE), NSF Center for EUV Science and Technology, NSF, School of Physics and Astronomy [Tel Aviv], Tel Aviv University [Tel Aviv], Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), SIM/IDL Faculdade de Ciências da Universidade de Lisboa (FCUL), University of Lisboa, Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Konkoly Observatory, Research Centre for Astronomy and Earth Sciences [Budapest], Hungarian Academy of Sciences (MTA)-Hungarian Academy of Sciences (MTA), Geneva Observatory, Holl, B., Audard, M., Nienartowicz, K., Jevardat De Fombelle, G., Marchal, O., Mowlavi, N., Clementini, G., De Ridder, J., Evans, D.W., Guy, L.P., Lanzafame, A.C., Lebzelter, T., Rimoldini, L., Roelens, M., Zucker, S., Distefano, E., Garofalo, A., Lecoeur-Taïbi, I., Lopez, M., Molinaro, R., Muraveva, T., Panahi, A., Regibo, S., Ripepi, V., Sarro, L.M., Aerts, C., Anderson, R.I., Charnas, J., Barblan, F., Blanco-Cuaresma, S., Busso, G., Cuypers, J., De Angeli, F., Glass, F., Grenon, M., Juhász, Ã .L., Kochoska, A., Koubsky, P., Lanza, A.F., Leccia, S., Lorenz, D., Marconi, M., Marschalkó, G., Mazeh, T., Messina, S., Mignard, F., Moitinho, A., Molnár, L., Morgenthaler, S., Musella, I., Ordenovic, C., Ordóñez, D., Pagano, I., Palaversa, L., Pawlak, M., Plachy, E., Prša, A., Riello, M., Söveges, M., Szabados, L., Szegedi-Elek, E., Votruba, V., and Eyer, L.
- Subjects
Catalogs ,Galaxy: stellar content ,Stars: general ,Stars: oscillations ,Stars: solar-Type ,Stars: variables: general ,Astronomy and Astrophysics ,Space and Planetary Science ,Cepheid variable ,Astronomy ,media_common.quotation_subject ,FOS: Physical sciences ,Astrophysics ,RR Lyrae variable ,01 natural sciences ,Photometry (optics) ,0103 physical sciences ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,Stars: oscillation ,media_common ,[PHYS]Physics [physics] ,Physics ,010308 nuclear & particles physics ,Probabilistic logic ,Astronomy and Astrophysic ,Stars ,Astrophysics - Solar and Stellar Astrophysics ,13. Climate action ,Sky ,ComputingMethodologies_DOCUMENTANDTEXTPROCESSING ,stars: general ,stars: oscillations ,stars: solar-type ,stars: variables: general ,catalogs ,Catalog ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Completeness (statistics) ,Astrophysics - Instrumentation and Methods for Astrophysics ,Data release - Abstract
The Gaia Data Release 2 (DR2): we summarise the processing and results of the identification of variable source candidates of RR Lyrae stars, Cepheids, long period variables (LPVs), rotation modulation (BY Dra-type) stars, delta Scuti & SX Phoenicis stars, and short-timescale variables. In this release we aim to provide useful but not necessarily complete samples of candidates. The processed Gaia data consist of the G, BP, and RP photometry during the first 22 months of operations as well as positions and parallaxes. Various methods from classical statistics, data mining and time series analysis were applied and tailored to the specific properties of Gaia data, as well as various visualisation tools. The DR2 variability release contains: 228'904 RR Lyrae stars, 11'438 Cepheids, 151'761 LPVs, 147'535 stars with rotation modulation, 8'882 delta Scuti & SX Phoenicis stars, and 3'018 short-timescale variables. These results are distributed over a classification and various Specific Object Studies (SOS) tables in the Gaia archive, along with the three-band time series and associated statistics for the underlying 550'737 unique sources. We estimate that about half of them are newly identified variables. The variability type completeness varies strongly as function of sky position due to the non-uniform sky coverage and intermediate calibration level of this data. The probabilistic and automated nature of this work implies certain completeness and contamination rates which are quantified so that users can anticipate their effects. This means that even well-known variable sources can be missed or misidentified in the published data. The DR2 variability release only represents a small subset of the processed data. Future releases will include more variable sources and data products; however, DR2 shows the (already) very high quality of the data and great promise for variability studies., 21 pages, 10 figures, 5 tables, accepted by Astronomy & Astrophysics, added several language corrections, and expanded Gaia archive query examples
- Published
- 2018
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