PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM

被引：60

作者：

Barclay, Thomas ^{[1
,2
]}

Huber, Daniel ^{[1
]}

Rowe, Jason F. ^{[1
,3
]}

Fortney, Jonathan J. ^{[4
]}

Morley, Caroline V. ^{[4
]}

Quintana, Elisa V. ^{[1
,3
]}

Fabrycky, Daniel C. ^{[4
]}

Barentsen, Geert ^{[5
]}

Bloemen, Steven ^{[6
]}

Christiansen, Jessie L. ^{[1
,3
]}

Demory, Brice-Olivier ^{[7
]}

Fulton, Benjamin J. ^{[8
]}

Jenkins, Jonm. ^{[1
,3
]}

Mullally, Fergal ^{[1
,3
]}

Ragozzine, Darin ^{[9
]}

Seader, Shaun E. ^{[1
,3
]}

Shporer, Avi ^{[8
,10
]}

Tenenbaum, Peter ^{[1
,3
]}

Thompson, Susan E. ^{[1
,3
]}

机构：

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

[2] Bay Area Environm Res Inst Inc, Sonoma, CA 95476 USA

[3] SETI Inst, Mountain View, CA 94043 USA

[4] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[5] Armagh Observ, Armagh BT61 9DG, North Ireland

[6] Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Louvain, Belgium

[7] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

[8] Las Cumbres Observ Global Telescope Network, Santa Barbara, CA 93117 USA

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

[10] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 761卷 / 01期

基金：

欧洲研究理事会;

关键词：

planets and satellites: individual (TrES-2b); stars: individual (TrES-2A); techniques: photometric; TRANSIT TIMING OBSERVATIONS; SOLAR-LIKE OSCILLATIONS; HOT JUPITER ATMOSPHERES; SPACE-BASED PHOTOMETRY; LIGHT CURVES; EXTRASOLAR PLANETS; KEPLER-MISSION; RED GIANTS; ELLIPSOIDAL VARIATIONS; HD; 209458B;

D O I：

10.1088/0004-637X/761/1/53

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We measure the mass and radius of the star and planet in the TrES-2 system using 2.7 years of observations by the Kepler spacecraft. The light curve shows evidence for ellipsoidal variations and Doppler beaming on a period consistent with the orbital period of the planet with amplitudes of 2.79(-0.62)(+0.44) and 3.44(-0.37)(+0.32) parts per million (ppm), respectively, and a difference between the dayside and the nightside planetary flux of 3.41(-0.82)(+0.55) ppm. We present an asteroseismic analysis of solar-like oscillations on TrES-2A which we use to calculate the stellar mass of 0.94 +/- 0.05 M-circle dot and radius of 0.95 +/- 0.02 R-circle dot. Using these stellar parameters, a transit model fit and the phase-curve variations, we determine the planetary radius of 1.162(-0.024)(+0.020) R-Jup and derive a mass for TrES-2b from the photometry of 1.44 +/- 0.21 M-Jup. The ratio of the ellipsoidal variation to the Doppler beaming amplitudes agrees to better than 2 sigma with theoretical predications, while our measured planet mass and radius agree within 2s of previously published values based on spectroscopic radial velocity measurements. We measure a geometric albedo of 0.0136(-0.0033)(+0.0022) and an occultation (secondary eclipse) depth of 6.5(-1.8)(+1.7) ppm which we combined with the day/night planetary flux ratio to model the atmosphere of TrES-2b. We find that an atmosphere model that contains a temperature inversion is strongly preferred. We hypothesize that the Kepler bandpass probes a significantly greater atmospheric depth on the night side relative to the day side.

引用

页数：10

共 124 条

[1] VERIFYING ASTEROSEISMICALLY DETERMINED PARAMETERS OF KEPLER STARS USING HIPPARCOS PARALLAXES: SELF-CONSISTENT STELLAR PROPERTIES AND DISTANCES [J].

Aguirre, V. Silva ;

Casagrande, L. ;

Basu, S. ;

Campante, T. L. ;

Chaplin, W. J. ;

Huber, D. ;

Miglio, A. ;

Serenelli, A. M. ;

Ballot, J. ;

Bedding, T. R. ;

Christensen-Dalsgaard, J. ;

Creevey, O. L. ;

Elsworth, Y. ;

Garcia, R. A. ;

Gilliland, R. L. ;

Hekker, S. ;

Kjeldsen, H. ;

Mathur, S. ;

Metcalfe, T. S. ;

Monteiro, M. J. P. F. G. ;

Mosser, B. ;

Pinsonneault, M. H. ;

Stello, D. ;

Weiss, A. ;

Tenenbaum, P. ;

Twicken, J. D. ;

Uddin, K. .

ASTROPHYSICAL JOURNAL, 2012, 757 (01)

[2] TrES-1: The transiting planet of a bright K0V star [J].

Alonso, R ;

Brown, TM ;

Torres, G ;

Latham, DW ;

Sozzetti, A ;

Mandushev, G ;

Belmonte, JA ;

Charbonneau, D ;

Deeg, HJ ;

Dunham, EW ;

O'Donovan, FT ;

Stefanik, RP .

ASTROPHYSICAL JOURNAL, 2004, 613 (02) :L153-L156

[3] A homogeneous spectroscopic analysis of host stars of transiting planets [J].

Ammler-von Eiff, M. ;

Santos, N. C. ;

Sousa, S. G. ;

Fernandes, J. ;

Guillot, T. ;

Israelian, G. ;

Mayor, M. ;

Melo, C. .

ASTRONOMY & ASTROPHYSICS, 2009, 507 (01) :523-530

[4] THERMAL TIDES IN FLUID EXTRASOLAR PLANETS [J].

Arras, Phil ;

Socrates, Aristotle .

ASTROPHYSICAL JOURNAL, 2010, 714 (01) :1-12

[5] System description and first light curves of the Hungarian Automated Telescope, an autonomous observatory for variability search [J].

Bakos, GA ;

Lázár, J ;

Papp, I ;

Sári, P ;

Green, EM .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2002, 114 (799) :974-987

[6] A SEARCH FOR ADDITIONAL PLANETS IN THE NASA EPOXI OBSERVATIONS OF THE EXOPLANET SYSTEM GJ 436 [J].

Ballard, Sarah ;

Christiansen, Jessie L. ;

Charbonneau, David ;

Deming, Drake ;

Holman, Matthew J. ;

Fabrycky, Daniel ;

A'Hearn, Michael F. ;

Wellnitz, Dennis D. ;

Barry, Richard K. ;

Kuchner, Marc J. ;

Livengood, Timothy A. ;

Hewagama, Tilak ;

Sunshine, Jessica M. ;

Hampton, Don L. ;

Lisse, Carey M. ;

Seager, Sara ;

Veverka, Joseph F. .

ASTROPHYSICAL JOURNAL, 2010, 716 (02) :1047-1059

[7] Serendipitous Kepler observations of a background dwarf nova of SU UMa type [J].

Barclay, Thomas ;

Still, Martin ;

Jenkins, Jon M. ;

Howell, Steve B. ;

Roettenbacher, Rachael M. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 422 (02) :1219-1230

[8]

Barnes R., 2010, Formation and evolution of exoplanets

[9] EFFECT OF UNCERTAINTIES IN STELLAR MODEL PARAMETERS ON ESTIMATED MASSES AND RADII OF SINGLE STARS [J].

Basu, Sarbani ;

Verner, Graham A. ;

Chaplin, William J. ;

Elsworth, Yvonne .

ASTROPHYSICAL JOURNAL, 2012, 746 (01)

[10] DETERMINATION OF STELLAR RADII FROM ASTEROSEISMIC DATA [J].

Basu, Sarbani ;

Chaplin, William J. ;

Elsworth, Yvonne .

ASTROPHYSICAL JOURNAL, 2010, 710 (02) :1596-1609

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