SOLAR-LIKE OSCILLATIONS IN KIC 11395018 AND KIC 11234888 FROM 8 MONTHS OF KEPLER DATA

被引：57

作者：

Mathur, S. ^{[1
]}

Handberg, R. ^{[2
]}

Campante, T. L. ^{[2
,3
,4
]}

Garcia, A. ^{[5
]}

Appourchaux, T. ^{[6
]}

Bedding, T. R. ^{[7
]}

Mosser, B. ^{[8
]}

Chaplin, W. J. ^{[9
]}

Ballot, J. ^{[10
]}

Benomar, O. ^{[6
]}

Bonanno, A. ^{[11
]}

Corsaro, E. ^{[11
]}

Gaulme, P. ^{[6
]}

Hekker, S. ^{[12
]}

Regulo, C. ^{[13
,14
]}

Salabert, D. ^{[13
,14
]}

Verner, G. ^{[9
,15
]}

White, T. R. ^{[7
,16
]}

Brandao, I. M. ^{[17
]}

Creevey, O. L. ^{[13
,14
]}

Dogan, G. ^{[2
]}

Elsworth, Y. ^{[9
]}

Huber, D. ^{[7
]}

Hale, S. J. ^{[9
]}

Houdek, G. ^{[18
]}

Karoff, C. ^{[2
]}

Metcalfe, T. S. ^{[1
]}

Molenda-Zakowicz, J. ^{[19
]}

Monteiro, M. J. P. F. G. ^{[3
,4
]}

Thompson, M. J. ^{[1
]}

Christensen-Dalsgaard, J. ^{[2
]}

Gilliland, R. L. ^{[20
]}

Kawaler, S. D. ^{[21
]}

Kjeldsen, H. ^{[2
]}

Quintana, E. V. ^{[22
]}

Sanderfer, D. T.

Seader, S. E.

机构：

[1] Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA

[2] Univ Aarhus, Dept Phys & Astron, Danish AsteroSeismol Ctr, DK-8000 Aarhus C, Denmark

[3] Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal

[4] Univ Porto, Fac Ciencias, P-4150762 Oporto, Portugal

[5] Univ Paris Diderot, CNRS, IRFU SAp, Lab AIM,CEA DSM, F-91191 Gif Sur Yvette, France

[6] Univ Paris 11, UMR8617, Inst Astrophys Spatiale, F-91405 Orsay, France

[7] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia

[8] Univ Paris 07, Univ Paris 06, UMR8109, LESIA, F-92195 Meudon, France

[9] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[10] Univ Toulouse, CNRS, Inst Rech Astrophys & Planetol, F-31400 Toulouse, France

[11] INAF Osservatorio Astrofis Catania, I-95123 Catania, Italy

[12] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1090 GE Amsterdam, Netherlands

[13] Univ La Laguna, Dpto Astrofis, E-38206 Tenerife, Spain

[14] Inst Astrofis Canarias, Tenerife 38205, Spain

[15] Queen Mary Univ London, Astron Unit, London E1 4NS, England

[16] Australian Astron Observ, Epping, NSW 1710, Australia

[17] Univ Porto, Fac Ciencias, Dept Fis & Astron, Oporto, Portugal

[18] Univ Vienna, Inst Astron, A-1180 Vienna, Austria

[19] Univ Wroclaw, Astron Inst, PL-51622 Wroclaw, Poland

[20] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[21] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[22] NASA, SETI Inst, Ames Res Ctr, Moffett Field, CA 94035 USA

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 733卷 / 02期

基金：

美国国家科学基金会;

关键词：

asteroseismology; methods: data analysis; stars:; individual; (KIC; 11395018; KIC; 11234888); stars: oscillations; stars: solar-type; MAGNETIC ACTIVITY CYCLE; STELLAR OSCILLATIONS; RED GIANTS; P-MODES; PARAMETERS; ASTEROSEISMOLOGY; ROTATION; INCLINATION; STARS; AXIS;

D O I：

10.1088/0004-637X/733/2/95

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the photometric short-cadence data obtained with the Kepler mission during the first 8 months of observations of two solar-type stars of spectral types G and F: KIC 11395018 and KIC 11234888, respectively, the latter having a lower signal-to-noise ratio (S/N) compared with the former. We estimate global parameters of the acoustic (p) modes such as the average large and small frequency separations, the frequency of the maximum of the p-mode envelope, and the average line width of the acoustic modes. We were able to identify and to measure 22 p-mode frequencies for the first star and 16 for the second one even though the S/N of these stars are rather low. We also derive some information about the stellar rotation periods from the analyses of the low-frequency parts of the power spectral densities. A model-independent estimation of the mean density, mass, and radius is obtained using the scaling laws. We emphasize the importance of continued observations for the stars with low S/N for an improved characterization of the oscillation modes. Our results offer a preview of what will be possible for many stars with the long data sets obtained during the remainder of the mission.

引用

页数：10

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