PHOTOMETRIC VARIABILITY IN KEPLER TARGET STARS. II. AN OVERVIEW OF AMPLITUDE, PERIODICITY, AND ROTATION IN FIRST QUARTER DATA

被引：163

作者：

Basri, Gibor ^{[1
]}

Walkowicz, Lucianne M. ^{[1
]}

Batalha, Natalie ^{[2
]}

Gilliland, Ronald L. ^{[3
]}

Jenkins, Jon ^{[2
]}

Borucki, William J. ^{[2
]}

Koch, David ^{[2
]}

Caldwell, Doug ^{[2
]}

Dupree, Andrea K. ^{[4
]}

Latham, David W. ^{[4
]}

Marcy, Geoffrey W. ^{[1
]}

Meibom, Soeren ^{[4
]}

Brown, Tim ^{[5
]}

机构：

[1] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[2] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

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

[4] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[5] Las Cumbres Observ Global Telescope, Goleta, CA 93117 USA

来源：

ASTRONOMICAL JOURNAL | 2011年 / 141卷 / 01期

关键词：

stars: activity; starspots; stars: rotation; stars: solar-type; stars: statistics; stars: variables: general; OSCILLATIONS;

D O I：

10.1088/0004-6256/141/1/20

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We provide an overview of stellar variability in the first quarter data from the Kepler mission. The intent of this paper is to examine the entire sample of over 150,000 target stars for periodic behavior in their light curves and relate this to stellar characteristics. This data set constitutes an unprecedented study of stellar variability given its great precision and complete time coverage (with a half hour cadence). Because the full Kepler pipeline is not currently suitable for a study of stellar variability of this sort, we describe our procedures for treating the "raw" pipeline data. About half of the total sample exhibits convincing periodic variability up to two weeks, with amplitudes ranging from differential intensity changes of less than 10(-4) up to more than 10%. K and M dwarfs have a greater fraction of period behavior than G dwarfs. The giants in the sample have distinctive quasi-periodic behavior, but are not periodic in the way we define it. Not all periodicities are due to rotation, and the most significant period is not necessarily the rotation period. We discuss properties of the light curves, and in particular look at a sample of very clearly periodic G dwarfs. It is clear that a large number of them do vary because of rotation and starspots, but it will take further analysis to fully exploit this.

引用

页数：8

共 15 条

[1]

Affer L, 2009, AIP CONF PROC, V1094, P341, DOI 10.1063/1.3099115

[2]

Alonso R, 2008, ASTRON ASTROPHYS, V482, pL21, DOI 10.1051/0004-6361:200809431

[3] PHOTOMETRIC VARIABILITY IN KEPLER TARGET STARS: THE SUN AMONG STARS-A FIRST LOOK [J].

Basri, Gibor ;

Walkowicz, Lucianne M. ;

Batalha, Natalie ;

Gilliland, Ronald L. ;

Jenkins, Jon ;

Borucki, William J. ;

Koch, David ;

Caldwell, Doug ;

Dupree, Andrea K. ;

Latham, David W. ;

Meibom, Soren ;

Howell, Steve ;

Brown, Tim .

ASTROPHYSICAL JOURNAL LETTERS, 2010, 713 (02) :L155-L159

[4] PRE-SPECTROSCOPIC FALSE-POSITIVE ELIMINATION OF KEPLER PLANET CANDIDATES [J].

Batalha, Natalie M. ;

Rowe, Jason F. ;

Gilliland, Ronald L. ;

Jenkins, Jon J. ;

Caldwell, Douglas ;

Borucki, William J. ;

Koch, David G. ;

Lissauer, Jack J. ;

Dunham, Edward W. ;

Gautier, Thomas N. ;

Howell, Steve B. ;

Latham, David W. ;

Marcy, Geoff W. ;

Prsa, Andrej .

ASTROPHYSICAL JOURNAL LETTERS, 2010, 713 (02) :L103-L108

[5] SELECTION, PRIORITIZATION, AND CHARACTERISTICS OF KEPLER TARGET STARS [J].

Batalha, Natalie M. ;

Borucki, William J. ;

Koch, David G. ;

Bryson, Stephen T. ;

Haas, Michael. R. ;

Brown, Timothy M. ;

Caldwell, Douglas A. ;

Hall, Jennifer R. ;

Gilliland, Ronald L. ;

Latham, David W. ;

Meibom, Soren ;

Monet, David G. .

ASTROPHYSICAL JOURNAL LETTERS, 2010, 713 (02) :L109-L114

[6] SOLAR-LIKE OSCILLATIONS IN LOW-LUMINOSITY RED GIANTS: FIRST RESULTS FROM KEPLER [J].

Bedding, T. R. ;

Huber, D. ;

Stello, D. ;

Elsworth, Y. P. ;

Hekker, S. ;

Kallinger, T. ;

Mathur, S. ;

Mosser, B. ;

Preston, H. L. ;

Ballot, J. ;

Barban, C. ;

Broomhall, A. M. ;

Buzasi, D. L. ;

Chaplin, W. J. ;

Garcia, R. A. ;

Gruberbauer, M. ;

Hale, S. J. ;

De Ridder, J. ;

Frandsen, S. ;

Borucki, W. J. ;

Brown, T. ;

Christensen-Dalsgaard, J. ;

Gilliland, R. L. ;

Jenkins, J. M. ;

Kjeldsen, H. ;

Koch, D. ;

Belkacem, K. ;

Bildsten, L. ;

Bruntt, H. ;

Campante, T. L. ;

Deheuvels, S. ;

Derekas, A. ;

Dupret, M. -A. ;

Goupil, M. -J. ;

Hatzes, A. ;

Houdek, G. ;

Ireland, M. J. ;

Jiang, C. ;

Karoff, C. ;

Kiss, L. L. ;

Lebreton, Y. ;

Miglio, A. ;

Montalban, J. ;

Noels, A. ;

Roxburgh, I. W. ;

Sangaralingam, V. ;

Stevens, I. R. ;

Suran, M. D. ;

Tarrant, N. J. ;

Weiss, A. .

ASTROPHYSICAL JOURNAL LETTERS, 2010, 713 (02) :L176-L181

[7] Kepler's Optical Phase Curve of the Exoplanet HAT-P-7b [J].

Borucki, W. J. ;

Koch, D. ;

Jenkins, J. ;

Sasselov, D. ;

Gilliland, R. ;

Batalha, N. ;

Latham, D. W. ;

Caldwell, D. ;

Basri, G. ;

Brown, T. ;

Christensen-Dalsgaard, J. ;

Cochran, W. D. ;

DeVore, E. ;

Dunham, E. ;

Dupree, A. K. ;

Gautier, T. ;

Geary, J. ;

Gould, A. ;

Howell, S. ;

Kjeldsen, H. ;

Lissauer, J. ;

Marcy, G. ;

Meibom, S. ;

Morrison, D. ;

Tarter, J. .

SCIENCE, 2009, 325 (5941) :709-709

[8]

CALDWELL DA, 2010, APJ, V713, pL120

[9] Total solar irradiance observations from DIARAD/VIRGO [J].

Dewitte, S ;

Crommelynck, D ;

Joukoff, A .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2004, 109 (A2)

[10] Photometric oscillations of low-luminosity red giant stars [J].

Gilliland, Ronald L. .

ASTRONOMICAL JOURNAL, 2008, 136 (02) :566-579

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