Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars

Timothy R. Bedding (), Benoit Mosser, Daniel Huber, Josefina Montalbán, Paul Beck, Jørgen Christensen-Dalsgaard, Yvonne P. Elsworth, Rafael A. García, Andrea Miglio, Dennis Stello, Timothy R. White, Joris De Ridder, Saskia Hekker, Conny Aerts, Caroline Barban, Kevin Belkacem, Anne-Marie Broomhall, Timothy M. Brown, Derek L. Buzasi, Fabien Carrier, William J. Chaplin, Maria Pia Di Mauro, Marc-Antoine Dupret, Søren Frandsen, Ronald L. Gilliland, Marie-Jo Goupil, Jon M. Jenkins, Thomas Kallinger, Steven Kawaler, Hans Kjeldsen, Savita Mathur, Arlette Noels, Victor Silva Aguirre and Paolo Ventura
Additional contact information
Timothy R. Bedding: Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, New South Wales 2006, Australia
Benoit Mosser: LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon cedex, France
Daniel Huber: Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, New South Wales 2006, Australia
Josefina Montalbán: Institut d'Astrophysique et de Géophysique de l'Université de Liège, Allée du 6 Août 17, B 4000 Liège, Belgium
Paul Beck: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Jørgen Christensen-Dalsgaard: Danish AsteroSeismology Centre (DASC), Aarhus University, DK-8000 Aarhus C, Denmark
Yvonne P. Elsworth: School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
Rafael A. García: Laboratoire AIM, CEA/DSM-CNRS, Université Paris 7 Diderot, IRFU/SAp, Centre de Saclay, 91191 Gif-sur-Yvette, France
Andrea Miglio: Institut d'Astrophysique et de Géophysique de l'Université de Liège, Allée du 6 Août 17, B 4000 Liège, Belgium
Dennis Stello: Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, New South Wales 2006, Australia
Timothy R. White: Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, New South Wales 2006, Australia
Joris De Ridder: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Saskia Hekker: School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
Conny Aerts: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Caroline Barban: LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon cedex, France
Kevin Belkacem: Institut d'Astrophysique Spatiale, UMR 8617, Université Paris XI, Bâtiment 121, 91405 Orsay Cedex, France
Anne-Marie Broomhall: School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
Timothy M. Brown: Las Cumbres Observatory Global Telescope
Derek L. Buzasi: Eureka Scientific, 2452 Delmer Street Suite 100
Fabien Carrier: Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
William J. Chaplin: School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
Maria Pia Di Mauro: INAF – IASF, Istituto di Astrofisica Spaziale e Fisica Cosmica, Via del Fosso del Cavaliere 100, 00133 Roma, Italy
Marc-Antoine Dupret: Institut d'Astrophysique et de Géophysique de l'Université de Liège, Allée du 6 Août 17, B 4000 Liège, Belgium
Søren Frandsen: Danish AsteroSeismology Centre (DASC), Aarhus University, DK-8000 Aarhus C, Denmark
Ronald L. Gilliland: Space Telescope Science Institute, 3700 San Martin Drive
Marie-Jo Goupil: LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon cedex, France
Jon M. Jenkins: SETI Institute/NASA Ames Research Center, MS 244-30
Thomas Kallinger: University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia V6T 1Z1, Canada
Steven Kawaler: Iowa State University
Hans Kjeldsen: Danish AsteroSeismology Centre (DASC), Aarhus University, DK-8000 Aarhus C, Denmark
Savita Mathur: High Altitude Observatory, NCAR, PO Box 3000, Boulder, Colorado 80307, USA
Arlette Noels: Institut d'Astrophysique et de Géophysique de l'Université de Liège, Allée du 6 Août 17, B 4000 Liège, Belgium
Victor Silva Aguirre: Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85748 Garching, Germany
Paolo Ventura: INAF – Osservatorio Astronomico di Roma, Via Frascati 33, 00040 Monte Porzio Catone (RM), Italy

Nature, 2011, vol. 471, issue 7340, 608-611

Abstract: Kepler-based asteroseismology sorts red giants NASA's Kepler mission has been remarkably productive in its primary role, that of discovering and characterizing extrasolar planets. It does this indirectly, by monitoring the brightness of many thousands of main sequence stars in search of periodic fluctuations caused by planets crossing the face of the stars. But the high-precision photometry involved is also ideal for studying the stars themselves. Bedding et al. have used Kepler data to probe the internal structure of red giants. Their detailed measurements of the gravity modes in the cores of these stars allow them to distinguish between those burning hydrogen in a shell around a relatively inactive core and those burning helium in the core.

Date: 2011
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DOI: 10.1038/nature09935

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