SOLAR-LIKE OSCILLATIONS IN LOW-LUMINOSITY RED GIANTS: FIRST RESULTS FROM KEPLER
SOLAR-LIKE OSCILLATIONS IN LOW-LUMINOSITY RED GIANTS: FIRST RESULTS FROM KEPLER
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低光度红巨星中的类太阳振荡:开普勒的第一个结果
DOI:
10.1088/2041-8205/713/2/l176
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发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Bedding T
中科院分区:
文献类型:
--
作者:
Bedding T
We have measured solar-like oscillations in red giants using time-series photometry from the first 34 days of science operations of the Kepler Mission. The light curves, obtained with 30 minute sampling, reveal clear oscillations in a large sample of G and K giants, extending in luminosity from the red clump down to the bottom of the giant branch. We confirm a strong correlation between the large separation of the oscillations (Δν) and the frequency of maximum power (ν max). We focus on a sample of 50 low-luminosity stars (ν max> 100 μHz, L≲ 30 L☉) having high signal-to-noise ratios and showing the unambiguous signature of solar-like oscillations. These are H-shell-burning stars, whose oscillations should be valuable for testing models of stellar evolution and for constraining the star formation rate in the local disk. We use a new technique to compare stars on a single échelle diagram by scaling their frequencies and find well-defined ridges corresponding to radial and non-radial oscillations, including clear evidence for modes with angular degree l= 3. Measuring the small separation between l= 0 and l= 2 allows us to plot the so-called CD diagram of δν 02 versus Δν. The small separation δν 01 of l= 1 from the midpoint of adjacent l= 0 modes is negative, contrary to the Sun and solar-type stars. The ridge for l= 1 is notably broadened, which we attribute to mixed modes, confirming theoretical predictions for low-luminosity giants. Overall, the results demonstrate the tremendous potential of Kepler data for asteroseismology of red giants.
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DOI:
10.1088/2041-8205/713/2/l187
发表时间:
2010-01
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
S. Hekker;J. Debosscher;D. Huber;M. Hidas;J. De Ridder;C. Aerts;D. Stello;T. Bedding;R. Gilliland;J. Christensen-Dalsgaard;T. Brown;H. Kjeldsen;W. Borucki;D. Koch;J. Jenkins;H. Van Winckel;P. Beck;J. Blomme;J. Southworth;A. Pigulski;W. Chaplin;Y. Elsworth;I. Stevens;S. Dreizler;D. Kurtz;C. Maceroni;D. Cardini;A. Derekas;M. Suran
通讯作者:
S. Hekker;J. Debosscher;D. Huber;M. Hidas;J. De Ridder;C. Aerts;D. Stello;T. Bedding;R. Gilliland;J. Christensen-Dalsgaard;T. Brown;H. Kjeldsen;W. Borucki;D. Koch;J. Jenkins;H. Van Winckel;P. Beck;J. Blomme;J. Southworth;A. Pigulski;W. Chaplin;Y. Elsworth;I. Stevens;S. Dreizler;D. Kurtz;C. Maceroni;D. Cardini;A. Derekas;M. Suran
DOI:
--
发表时间:
2000-11
期刊:
arXiv: Astrophysics
影响因子:
--
作者:
H. Kjeldsen;T. Bedding
通讯作者:
H. Kjeldsen;T. Bedding
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
G. Houdek;D. Gough
通讯作者:
D. Gough
DOI:
10.1111/j.1365-2966.2007.11585.x
发表时间:
2007-02
影响因子:
4.8
作者:
D. Stello;D. Stello;D. Stello;H. Bruntt;H. Bruntt;H. Bruntt;H. Kjeldsen;T. Bedding;T. Arentoft;T. Arentoft;R. Gilliland;J. Nuspl;S.-L. Kim;Y. B. Kang;J. Koo;J. Lee;C. Sterken;C.‐U. Lee;H. R. Jensen;A. Jacob;R. Szabó;R. Szabó;S. Frandsen;Z. Csubry;Z. Dind;M. Bouzid;T. Dall;L. Kiss
通讯作者:
D. Stello;D. Stello;D. Stello;H. Bruntt;H. Bruntt;H. Bruntt;H. Kjeldsen;T. Bedding;T. Arentoft;T. Arentoft;R. Gilliland;J. Nuspl;S.-L. Kim;Y. B. Kang;J. Koo;J. Lee;C. Sterken;C.‐U. Lee;H. R. Jensen;A. Jacob;R. Szabó;R. Szabó;S. Frandsen;Z. Csubry;Z. Dind;M. Bouzid;T. Dall;L. Kiss
DOI:
10.1553/cia160s74
发表时间:
2009-10
期刊:
arXiv: Solar and Stellar Astrophysics
影响因子:
--
作者:
D. Huber;D. Stello;T. Bedding;W. Chaplin;T. Arentoft;P. Quirion;H. Kjeldsen
通讯作者:
D. Huber;D. Stello;T. Bedding;W. Chaplin;T. Arentoft;P. Quirion;H. Kjeldsen