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Gaia Data Release 2. Variable stars in the colour-absolute magnitude diagram

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  • معلومة اضافية
    • Contributors:
      Geneva Observatory; Université de Genève = University of Geneva (UNIGE); ISDC Data Centre for Astrophysics; Galaxies, Etoiles, Physique, Instrumentation (GEPI); Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS); Observatoire Astronomique de l'Université de Genève (ObsGE); Alma Mater Studiorum Università di Bologna = University of Bologna (UNIBO); School of Physics and Astronomy Tel Aviv (TAU); Raymond and Beverly Sackler Faculty of Exact Sciences Tel Aviv (TAU); Tel Aviv University (TAU)-Tel Aviv University (TAU); Konkoly Observatory; Research Centre for Astronomy and Earth Sciences Budapest; Hungarian Academy of Sciences (MTA)-Hungarian Academy of Sciences (MTA); INAF - Osservatorio Astronomico di Padova (OAPD); Istituto Nazionale di Astrofisica (INAF); Agence Spatiale Européenne = European Space Agency (ESA); European Space Research and Technology Centre (ESTEC); Institut de Planétologie et d'Astrophysique de Grenoble (IPAG); Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ); Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ); Universität Greifswald - University of Greifswald; Institut de Ciencies del Cosmos (ICCUB); Universitat de Barcelona (UB); Lund Observatory; Lund University; Departament d'Astronomia i Meteorologia Barcelona (DAM); Joseph Louis LAGRANGE (LAGRANGE); Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur; Université Côte d'Azur (UniCA)-Université Côte d'Azur (UniCA)-Centre National de la Recherche Scientifique (CNRS); Centre National d'Études Spatiales Toulouse (CNES); Université libre de Bruxelles (ULB); Zentrum für astronomie; Universität Heidelberg Heidelberg = Heidelberg University; Mullard Space Science Laboratory (MSSL); University College of London London (UCL); Systèmes de Référence Temps Espace (SYRTE); Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS); Department of Physics and Astronomy Uppsala; Uppsala University; Departamento de Astrofisica Madrid; Centro de Astrobiologia Madrid (CAB); Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC); Department of Physics and Astronomy Leicester; University of Leicester; Observatoire astronomique de Strasbourg (OAS); Institut national des sciences de l'Univers (INSU - CNRS)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS); M2A 2019; Laboratoire d'Astrophysique de Bordeaux Pessac (LAB); Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); INAF - Osservatorio Astronomico di Bologna (OABO); Kapteyn Astronomical Institute Groningen; University of Groningen Groningen; FORMATION STELLAIRE 2019; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Leiden Observatory Leiden; Universiteit Leiden = Leiden University; Royal Observatory of Belgium = Observatoire Royal de Belgique (ROB); Centre d'étude spatiale des rayonnements (CESR); Université Toulouse III - Paul Sabatier (UT3); Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP); Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3); Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS); INAF - Osservatorio Astronomico di Roma (OAR); Institute of Astronomy Leuven; Catholic University of Leuven = Katholieke Universiteit Leuven (KU Leuven); Department of Astronomy and Space Physics Uppsala; Laboratoire Kastler Brossel (LKB (Lhomond)); Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS); École normale supérieure - Paris (ENS-PSL); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS); Aberystwyth University; Institute for Mathematics, Astrophysics and Particle Physics (IMAPP); Radboud University Nijmegen; Geophysical Laboratory Carnegie Institution; Carnegie Institution for Science; Institut d'Astrophysique et de Géophysique Liège; Université de Liège; Instituto de Astronomia, Geofísica e Ciências Atmosféricas São Paulo (IAG); Universidade de São Paulo = University of São Paulo (USP); Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS); Dipartimento di Fisica; Politecnico di Milano Milan (POLIMI); Astrometry; INAF - Osservatorio Astrofisico di Torino (OATo)
    • بيانات النشر:
      HAL CCSD
      EDP Sciences
    • الموضوع:
      2019
    • Collection:
      Météo-France: HAL
    • نبذة مختصرة :
      International audience ; Context. The ESA Gaia mission provides a unique time-domain survey for more than 1.6 billion sources with G 21 mag. Aims. We showcase stellar variability in the Galactic colour-absolute magnitude diagram (CaMD). We focus on pulsating, eruptive, and cataclysmic variables, as well as on stars that exhibit variability that is due to rotation and eclipses. Methods. We describe the locations of variable star classes, variable object fractions, and typical variability amplitudes throughout the CaMD and show how variability-related changes in colour and brightness induce "motions". To do this, we use 22 months of calibrated photometric, spectro-photometric, and astrometric Gaia data of stars with a significant parallax. To ensure that a large variety of variable star classes populate the CaMD, we crossmatched Gaia sources with known variable stars. We also used the statistics and variability detection modules of the Gaia variability pipeline. Corrections for interstellar extinction are not implemented in this article. Results. Gaia enables the first investigation of Galactic variable star populations in the CaMD on a similar, if not larger, scale as was previously done in the Magellanic Clouds. Although the observed colours are not corrected for reddening, distinct regions are visible in which variable stars occur. We determine variable star fractions to within the current detection thresholds of Gaia. Finally, we report the most complete description of variability-induced motion within the CaMD to date. Conclusions. Gaia enables novel insights into variability phenomena for an unprecedented number of stars, which will benefit the understanding of stellar astrophysics. The CaMD of Galactic variable stars provides crucial information on physical origins of variability in a way that has previously only been accessible for Galactic star clusters or external galaxies. Future Gaia data releases will enable significant improvements over this preview by providing longer time series, more accurate ...
    • Relation:
      info:eu-repo/semantics/altIdentifier/arxiv/1804.09382; hal-02071443; https://hal.science/hal-02071443; https://hal.science/hal-02071443/document; https://hal.science/hal-02071443/file/aa33304-18.pdf; ARXIV: 1804.09382; BIBCODE: 2019A&A.623A.110G; INSPIRE: 1797551
    • الرقم المعرف:
      10.1051/0004-6361/201833304
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.92CCD8C3