Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/23710
Titolo: | Oscillating Red Giants Observed during Campaign 1 of the Kepler K2 Mission: New Prospects for Galactic Archaeology | Autori: | Stello, Dennis Huber, Daniel Sharma, Sanjib Johnson, Jennifer Lund, Mikkel N. Handberg, Rasmus Buzasi, Derek L. Silva Aguirre, Victor Chaplin, William J. MIGLIO, ANDREA Pinsonneault, Marc Basu, Sarbani Bedding, Tim R. Bland-Hawthorn, Joss Casagrande, Luca Davies, Guy Elsworth, Yvonne Garcia, Rafael A. Mathur, Savita DI MAURO, Maria Pia Mosser, Benoit Schneider, Donald P. Serenelli, Aldo Valentini, Marica |
Data pubblicazione: | 2015 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 809 | Fascicolo: | 1 | Da pagina:: | L3 | Abstract: | NASA’s re-purposed Kepler mission—dubbed K2—has brought new scientific opportunities that were not anticipated for the original Kepler mission. One science goal that makes optimal use of K2's capabilities, in particular its 360° ecliptic field of view, is galactic archaeology—the study of the evolution of the Galaxy from the fossil stellar record. The thrust of this research is to exploit high-precision, time-resolved photometry from K2 in order to detect oscillations in red giant stars. This asteroseismic information can provide estimates of stellar radius (hence distance), mass, and age of vast numbers of stars across the Galaxy. Here we present the initial analysis of a subset of red giants, observed toward the north galactic gap, during the mission’s first full science campaign. We investigate the feasibility of using K2 data for detecting oscillations in red giants that span a range in apparent magnitude and evolutionary state (hence intrinsic luminosity). We demonstrate that oscillations are detectable for essentially all cool giants within the {log}g range ̃1.9-3.2. Our detection is complete down to {\text{Kp}} ̃ 14.5, which results in a seismic sample with little or no detection bias. This sample is ideally suited to stellar population studies that seek to investigate potential shortcomings of contemporary Galaxy models. | Acknowledgments: | This work was supported by the National Science Foundation under grants PHY 11-25915 and AST 11-09174. Funding for the Stellar Astrophysics Centre is provided by The Danish National Research Foundation (Grant DNRF106). The research is supported by the ASTERISK project (ASTERoseismic Investigations with SONG and Kepler ) funded by the European Research Council (grant agreement No.: 267864). D.S. acknowledges support from the Australian Research Council. D.H. acknowledges support by the Australian Research Council’s Discovery Projects funding scheme (project number DE140101364) and support by the National Aeronautics and Space Administration under grant NNX14AB92G issued through the Kepler Participating Scientist Program. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III web site is http://www.sdss3.org /. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University. S.B. acknowledges partial support from NSF grant AST-1105930 and NASA grant NNX13AE70G. R.A.G acknowledges the support from CNES. A.S. acknowledges support from ESP2013-41268-R (MINECO) and 2014SGR-1458 (Generalitat de Catalunya). S.M. acknowledges support from the NASA grant NNX12AE17G. | URI: | http://hdl.handle.net/20.500.12386/23710 | URL: | https://iopscience.iop.org/article/10.1088/2041-8205/809/1/L3 | ISSN: | 0004-637X | DOI: | 10.1088/2041-8205/809/1/L3 | Bibcode ADS: | 2015ApJ...809L...3S | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
Stello_2015_ApJL_809_L3.pdf | PDF editoriale | 1.21 MB | Adobe PDF | Visualizza/apri |
Page view(s)
60
controllato il 24-apr-2024
Download(s)
13
controllato il 24-apr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.