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Mikkel Nørup Lund

Strömgren Survey for Asteroseismology and Galactic Archaeology: Let the SAGA Begin

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  • L. Casagrande, Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, The Australian National University, Canberra, ACT 2611, Australia
  • ,
  • Victor Silva Aguirre
  • D. Stello, Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, Sydney, NSW 2006, Australia, Danmark
  • D. Huber, NASA Ames Research Center Institute, Moffett Field, CA 94035, USA
  • ,
  • A. M. Serenelli, Institute of Space Sciences (IEEC-CSIC), Campus UAB, Fac. Ciéncies, Torre C5 parell 2, E-08193 Bellaterra, Spain
  • ,
  • S. Cassisi, INAF-Osservatorio Astronomico di Collurania, via Mentore Maggini, I-64100 Teramo, Italy jayander@stsci.edu
  • ,
  • A. Dotter, Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, The Australian National University, Canberra, ACT 2611, Australia
  • ,
  • A. P. Milone, Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, The Australian National University, Canberra, ACT 2611, Australia
  • ,
  • S. Hodgkin, Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK, Danmark
  • A. F. Marino, Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, The Australian National University, Canberra, ACT 2611, Australia
  • ,
  • M. N. Lund
  • A. Pietrinferni, INAF-Osservatorio Astronomico di Collurania, via Mentore Maggini, I-64100 Teramo, Italy jayander@stsci.edu
  • ,
  • M. Asplund, Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, The Australian National University, Canberra, ACT 2611, Australia
  • ,
  • S. Feltzing, Lund Observatory, Department of Astronomy and Theoretical Physics, P.O. Box 43, SE-22100 Lund, Sweden
  • ,
  • C. Flynn, Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122, Australia, Danmark
  • F. Grundahl
  • P. E. Nissen
  • R. Schönrich, Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210-1173, USA
  • ,
  • K. J. Schlesinger, Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, The Australian National University, Canberra, ACT 2611, Australia 0000-0003-0110-0540, Danmark
  • W. Wang, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China, Danmark
Asteroseismology has the capability of precisely determining stellar properties that would otherwise be inaccessible, such as radii, masses, and thus ages of stars. When coupling this information with classical determinations of stellar parameters, such as metallicities, effective temperatures, and angular diameters, powerful new diagnostics for Galactic studies can be obtained. The ongoing Strömgren survey for Asteroseismology and Galactic Archaeology has the goal of transforming the Kepler field into a new benchmark for Galactic studies, similar to the solar neighborhood. Here we present the first results from a stripe centered at a Galactic longitude of 74° and covering latitude from about 8° to 20°, which includes almost 1000 K giants with seismic information and the benchmark open cluster NGC 6819. We describe the coupling of classical and seismic parameters, the accuracy as well as the caveats of the derived effective temperatures, metallicities, distances, surface gravities, masses, and radii. Confidence in the achieved precision is corroborated by the detection of the first and secondary clumps in a population of field stars with a ratio of 2 to 1 and by the negligible scatter in the seismic distances among NGC 6819 member stars. An assessment of the reliability of stellar parameters in the Kepler Input Catalog is also performed, and the impact of our results for population studies in the Milky Way is discussed, along with the importance of an all-sky Strömgren survey. Based on observations made with the Isaac Newton Telescope operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias.
OriginalsprogEngelsk
Artikelnummer110
TidsskriftAstrophysical Journal
Vol/bind787
Nummer2
Antal sider25
ISSN0004-637X
DOI
StatusUdgivet - 1 jun. 2014

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