A search for solar-like oscillations in K giants in the globular cluster M 4
| Autor: | A. P. Jacob, Timothy R. Bedding, S. Frandsen, H. Kjeldsen, G. Kopacki, J. Matthiesen, E. Michel, Torben Arentoft, R. L. Gilliland, Peter D. Edmonds, D. Stello, H. Bruntt, Frank Grundahl |
|---|---|
| Přispěvatelé: | Henry, Florence, Department of Physics and Astronomy, Aarhus University, Institute of Astronomy, University of Wroclaw, School of physics, University of New South Wales, Space Telescope Science Institute (STScI), Center for Astrophysics, Harvard University, Cambridge, Observatoire de Paris, Université Paris sciences et lettres (PSL), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Astronomie du LESIA, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris |
| Rok vydání: | 2007 |
| Předmět: |
Physics
Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Giant star Light curve Asteroseismology Spectral line Photometry (astronomy) Stars Space and Planetary Science Globular cluster Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Solar-like oscillations [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph] Astrophysics::Galaxy Astrophysics |
| Zdroj: | Frandsen, S, Bruntt, H, Grundahl, F, Kopacki, G, Kjeldsen, H, Arentoft, T, Stello, D, Bedding, T R, Jacob, A P, Gilliland, R L, Edmonds, P D, Michel, E & Matthiesen, J 2007, ' A search for solar-like oscillations in K giants in the globular cluster M 4 ', Astronomy & Astrophysics, vol. 475, no. 3, pp. 991-1002 . https://doi.org/10.1051/0004-6361:20078267 Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, 2007, 475, pp.991-1002 |
| ISSN: | 1432-0746 0004-6361 |
| Popis: | To expand the range in the colour-magnitude diagram where asteroseismology can be applied, we organized a photometry campaign to find evidence for solar-like oscillations in giant stars in the globular cluster M4. The aim was to detect the comb-like p-mode structure characteristic for solar-like oscillations in the amplitude spectra. The two dozen main target stars are in the region of the bump stars and have luminosities in the range 50-140 Lsun. We collected 6160 CCD frames and light curves for about 14000 stars were extracted. We obtain high quality light curves for the K giants, but no clear oscillation signal is detected. High precision differential photometry is possible even in very crowded regions like the core of M4. Solar-like oscillations are probably present in K giants, but the amplitudes are lower than classical scaling laws predict. Comment: 14 pages, 16 figures, accepted for publication in A&A |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|