A change in the relationship between chromospheric activity and the large-scale magnetic field for G stars on the main sequence

• Main Authors: Brown, Emma, L., Jeffers, Sandra, V., Marsden, Stephen, C., Morin, Julien, Boro Saikia, Sudeshna, Petit, Pascal, Jardine, Moira, M., See, Victor, Vidotto, Aline, A., Mengel, Matthew, W., Dahlkemper, Merten, N.
• Other Authors: University of Southern Queensland (USQ), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Max-Planck-Gesellschaft, Laboratoire Univers et Particules de Montpellier (LUPM), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), University of Vienna Vienna, Institut de recherche en astrophysique et planétologie (IRAP), 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), SUPA School of Physics and Astronomy University of St Andrews, University of St Andrews Scotland -Scottish Universities Physics Alliance (SUPA), ESA - ESTEC (Netherlands), Trinity College Dublin, Leiden Observatory Leiden, Universiteit Leiden = Leiden University, Georg-August-University = Georg-August-Universität Göttingen, European Organization for Nuclear Research (CERN), Brun, Allan Sacha, Bouvier, Jérôme, BCool collaboration
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2022
• Subjects: [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]; narval
• Online Access: https://hal.science/hal-04169434; https://hal.science/hal-04169434/document; https://hal.science/hal-04169434/file/CoolStars21_poster.pdf; https://doi.org/10.5281/zenodo.7344161

International audience We present a database of chromospheric activity and magnetic field strengths for 954 F-M dwarf stars Our active sample complements previous chromospheric activity surveys that usually focus on inactive, planet search targets. The internal magnetic fields of cool stars are known to power activity in stellar chromospheres, but there is still much to learn about the nature of this relationship and its dependence on stellar properties. We draw on data from PolarBase, a rich legacy database of observations from the spectropolarimeters ESPaDOnS (CFHT) and NARVAL (TBL), to survey the chromospheric activity and large-scale magnetic field strengths for 954 F-M dwarf stars.