Eprint already available on another site (E-prints, working papers and research blog)
Age dating of an early Milky Way merger via asteroseismology of the naked-eye star ν Indi
Chaplin, W. J.; Serenelli, A. M.; Miglio, A. et al.
2020
 

Files


Full Text
chaplin20_astroph.pdf
Author postprint (1.28 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[en] Over the course of its history, the Milky Way has ingested multiple smaller satellite galaxies1. Although these accreted stellar populations can be forensically identified as kinematically distinct structures within the Galaxy, it is difficult in general to date precisely the age at which any one merger occurred. Recent results have revealed a population of stars that were accreted via the collision of a dwarf galaxy, called Gaia–Enceladus1, leading to substantial pollution of the chemical and dynamical properties of the Milky Way. Here we identify the very bright, naked-eye star ν Indi as an indicator of the age of the early in situ population of the Galaxy. We combine asteroseismic, spectroscopic, astrometric and kinematic observations to show that this metal-poor, alpha-element-rich star was an indigenous member of the halo, and we measure its age to be 11.0 ± 0.7 (stat) ± 0.8 (sys) billion years. The star bears hallmarks consistent with having been kinematically heated by the Gaia–Enceladus collision. Its age implies that the earliest the merger could have begun was 11.6 and 13.2 billion years ago, at 68% and 95% confidence, respectively. Computations based on hierarchical cosmological models slightly reduce the above limits. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Chaplin, W. J.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA, United States
Serenelli, A. M.;  Institute of Space Sciences (ICE, CSIC), Barcelona, Spain, Institut d’Estudis Espacials de Catalunya, Barcelona, Spain
Miglio, A.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Morel, Thierry  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Mackereth, J. T.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Vincenzo, F.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Center for Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH, United States, Department of Physics, The Ohio State University, Columbus, OH, United States
Kjeldsen, H.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Institute of Theoretical Physics and Astronomy, Vilnius University, Vilnius, Lithuania
Basu, S.;  Department of Astronomy, Yale University, New Haven, CT, United States
Ball, W. H.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Stokholm, A.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Verma, K.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Mosumgaard, J. R.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Silva Aguirre, V.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Mazumdar, A.;  Homi Bhabha Centre for Science Education, TIFR, Mumbai, India
Ranadive, P.;  Homi Bhabha Centre for Science Education, TIFR, Mumbai, India
Antia, H. M.;  Tata Institute of Fundamental Research, Mumbai, India
Lebreton, Y.;  LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, Meudon, France, Université Rennes, CNRS, Institut de Physique de Rennes, UMR, Rennes, France
Ong, J.;  Department of Astronomy, Yale University, New Haven, CT, United States
Appourchaux, T.;  Université Paris-Sud, Institut d’Astrophysique Spatiale, Orsay, France
Bedding, T. R.;  Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW, Australia
Christensen-Dalsgaard, J.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA, United States
Creevey, O.;  Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Nice, France
García, R. A.;  IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France, AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, Gif-sur-Yvette, France
Handberg, R.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Huber, D.;  Institute for Astronomy, University of Hawai‘i, Honolulu, HI, United States
Kawaler, S. D.;  Department of Physics and Astronomy, Iowa State University, Ames, IA, United States
Lund, M. N.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Metcalfe, T. S.;  Space Science Institute, Boulder, CO, United States, Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany
Stassun, K. G.;  Department of Physics and Astronomy, Vanderbilt University, Nashville, TN, United States, Vanderbilt Initiative in Data-intensive Astrophysics, Nashville, TN, United States
Bazot, M.;  Division of Sciences, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates, Center for Space Science, NYUAD Institute, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
Beck, P. G.;  Department for Geophysics, Meteorology and Astrophysics, Institute of Physics, Karl-Franzens University of Graz, NAWI Graz, Austria, Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain, Departamento de Astrofisica, Universidad de La Laguna, La Laguna, Tenerife, Spain
Bell, K. J.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany, DIRAC Institute, Department of Astronomy, University of Washington, Seattle, WA, United States
Bergemann, M.;  Max Planck Institute for Astronomy, Heidelberg, Germany
Buzasi, D. L.;  Dept. of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, FL, United States
Benomar, O.;  Center for Space Science, NYUAD Institute, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates, Solar Science Observatory, NAOJ and Department of Astronomical Science, Sokendai (GUAS), Mitaka, Tokyo, Japan
Bossini, D.;  Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal
Bugnet, L.;  IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France, AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, Gif-sur-Yvette, France
Campante, T. L.;  Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal, Departamento de Física e Astronomia, Faculdade de Ciências da Universidade do Porto, Porto, Portugal
Orhan, Z. Ç.;  Department of Astronomy and Space Sciences, Ege University, İzmir, Turkey
Corsaro, E.;  INAF, Osservatorio Astrofisico di Catania, Catania, Italy
González-Cuesta, L.;  Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain, Departamento de Astrofisica, Universidad de La Laguna, La Laguna, Tenerife, Spain
Davies, G. R.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Di Mauro, M. P.;  INAF-IAPS, Istituto di Astrofisica e Planetologia Spaziali, Roma, Italy
Egeland, R.;  High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States
Elsworth, Y. P.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Gaulme, P.;  Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany, Department of Astronomy, New Mexico State University, Las Cruces, NM, United States
Ghasemi, H.;  Department of Physics, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran
Guo, Z.;  Center for Exoplanets and Habitable Worlds, The Pennsylvania State University, University Park, PA, United States, Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA, United States
Hall, O. J.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Hasanzadeh, A.;  Department of Physics, University of Zanjan, Zanjan, Iran
Hekker, S.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany
Howe, R.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Jenkins, J. M.;  NASA Ames Research Center, Moffett Field, CA, United States
Jiménez, A.;  Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain, Departamento de Astrofisica, Universidad de La Laguna, La Laguna, Tenerife, Spain
Kiefer, R.;  Centre for Fusion, Space, and Astrophysics, Department of Physics, University of Warwick, Coventry, United Kingdom
Kuszlewicz, J. S.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany
Kallinger, T.;  Institute of Astronomy, University of Vienna, Vienna, Austria
Latham, D. W.;  Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA, United States
Lundkvist, M. S.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Mathur, S.;  Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain, Departamento de Astrofisica, Universidad de La Laguna, La Laguna, Tenerife, Spain
Montalbán, J.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Mosser, B.;  LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, Meudon, France
Bedón, A. M.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Nielsen, M. B.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Center for Space Science, NYUAD Institute, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
Örtel, S.;  Department of Astronomy and Space Sciences, Ege University, İzmir, Turkey
Rendle, B. M.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Ricker, G. R.;  Department of Physics, Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, United States
Rodrigues, T. S.;  Osservatorio Astronomico di Padova, INAF, Padua, Italy
Roxburgh, I. W.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Astronomy Unit, Queen Mary University of London, London, United Kingdom
Safari, H.;  Department of Physics, University of Zanjan, Zanjan, Iran
Schofield, M.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Seager, S.;  Department of Physics, Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, United States, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States, Department of Aeronautics and Astronautics, MIT, Cambridge, MA, United States
Smalley, B.;  Astrophysics Group, Lennard-Jones Laboratories, Keele University, Keele, United Kingdom
Stello, D.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW, Australia, School of Physics, The University of New South Wales, Sydney, NSW, Australia
Szabó, R.;  Konkoly Observatory, CSFK, Budapest, Hungary, MTA CSFK Lendület Near-Field Cosmology Research Group, Budapest, Hungary
Tayar, J.;  Hubble Fellow, Institute for Astronomy, University of Hawai‘i, Honolulu, HI, United States
Themeßl, N.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany
Thomas, A. E. L.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Vanderspek, R. K.;  Department of Physics, Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, United States
van Rossem, W. E.;  School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
Vrard, M.;  Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal, Departamento de Física e Astronomia, Faculdade de Ciências da Universidade do Porto, Porto, Portugal
Weiss, A.;  Max-Planck-Institut für Astrophysik, Garching, Germany
White, T. R.;  Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, The Australian National University, Canberra, ACT, Australia
Winn, J. N.;  Department of Astrophysical Sciences, Princeton University, Princeton, NJ, United States
Yıldız, M.;  Department of Astronomy and Space Sciences, Ege University, İzmir, Turkey
More authors (75 more) Less
Language :
English
Title :
Age dating of an early Milky Way merger via asteroseismology of the naked-eye star ν Indi
Publication date :
2020
Publisher :
Nature Research
Funders :
BELSPO - Belgian Science Policy Office [BE]
NASA - National Aeronautics and Space Administration [US-DC] [US-DC]
Funding text :
Carlsbergfondet: CF17-076MinistÃrio da Ciäncia, Tecnologia e Ensino Superior, MCTESFuel Cell Technologies Program, FCTOhio State University, OSU: AST-1903828RYC-2015-17697Kavli Institute for Theoretical Physics, University of California, Santa Barbara, KITPUID/FIS/04434/2019National Science Foundation, NSF: NSF PHY-1748958Science and Technology Facilities Council, STFCDanmarks Grundforskningsfond, DNRF: DNRF106National Aeronautics and Space Administration, NASA: 80NSSC19K0374Danmarks Frie Forskningsfond, DFF: 7027-00096BEuropean Research Council, ERC: 772293749962Science and Technology Facilities Council, STFC338251H2020 Marie SkÅ‚odowska-Curie Actions, MSCA: 792848Generalitat de Catalunya: 2017-SGR-1131National Aeronautics and Space Administration, NASA: 80NSSC19K0379, 80NSSC18K1585Space Telescope Science Institute, STScI: NAS5-26555, POCI-01-0145-FEDER-030389, COMPETE2020Center for Cosmology and Astroparticle Physics, Ohio State University, CCAPPTürkiye Bilimsel ve Teknolojik AraÅŸtirma Kurumu, Tà BITAK: TÃœBÄ°TAK:118F352NNX16AB76G, AST-1717000European Social Fund, ESFG1502Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI: 5142409.3.3-LMT-K-712-01-0103, AST-1514676Deutsches Zentrum für Luft- und Raumfahrt, DLR: 50OO1501, ST/L000733/1Department of Atomic Energy, Government of India, DAE: 12-R&D-TFR-6.04-0600Seventh Framework Programme, FP7European Research Council, ERCBES-2017-082610, SEV-2015-0548-17-2ESP2017-82674-RUK Space Agency, UKSA664931
Available on ORBi :
since 30 June 2020

Statistics


Number of views
88 (11 by ULiège)
Number of downloads
22 (6 by ULiège)

Scopus citations®
 
43
Scopus citations®
without self-citations
13
OpenCitations
 
39

Bibliography


Similar publications



Contact ORBi