Article (Scientific journals)
The Hot-Jupiter Kepler-17b: Discovery, Obliquity from Stroboscopic Starspots, and Atmospheric Characterization
Désert, Jean*-Michel; Charbonneau, David; Demory, Brice*-Olivier et al.
2011In Astrophysical Journal Supplement Series, 197, p. 14
Peer Reviewed verified by ORBi
 

Files


Full Text
1107.pdf
Author preprint (1.82 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
eclipses; planetary systems; stars: individual: Kepler-17b KIC 10619192 2MASS 19533486+4748540; techniques: photometric
Abstract :
[en] This paper reports the discovery and characterization of the transiting hot giant exoplanet Kepler-17b. The planet has an orbital period of 1.486 days, and radial velocity measurements from the Hobby-Eberly Telescope show a Doppler signal of 419.5[SUP]+13.3[/SUP] [SUB]-15.6[/SUB] m s[SUP]-1[/SUP]. From a transit-based estimate of the host star's mean density, combined with an estimate of the stellar effective temperature T [SUB]eff[/SUB] = 5630 ± 100 from high-resolution spectra, we infer a stellar host mass of 1.06 ± 0.07 M [SUB]&sun;[/SUB] and a stellar radius of 1.02 ± 0.03 R [SUB]&sun;[/SUB]. We estimate the planet mass and radius to be M [SUB]P[/SUB] = 2.45 ± 0.11 M [SUB]J[/SUB] and R [SUB]P[/SUB] = 1.31 ± 0.02 R [SUB]J[/SUB]. The host star is active, with dark spots that are frequently occulted by the planet. The continuous monitoring of the star reveals a stellar rotation period of 11.89 days, eight times the planet's orbital period; this period ratio produces stroboscopic effects on the occulted starspots. The temporal pattern of these spot-crossing events shows that the planet's orbit is prograde and the star's obliquity is smaller than 15°. We detected planetary occultations of Kepler-17b with both the Kepler and Spitzer Space Telescopes. We use these observations to constrain the eccentricity, e, and find that it is consistent with a circular orbit (e < 0.011). The brightness temperatures of the planet's infrared bandpasses are T_{3.6\, {\mu m}} = 1880 ± 100 K and T_{4.5\, {\mu m}} = 1770 ± 150 K. We measure the optical geometric albedo A[SUB]g[/SUB] in the Kepler bandpass and find A[SUB]g[/SUB] = 0.10 ± 0.02. The observations are best described by atmospheric models for which most of the incident energy is re-radiated away from the day side.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Désert, Jean*-Michel;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Charbonneau, David;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Demory, Brice*-Olivier;  Massachusetts Institute of Technology, Cambridge, MA 02159, USA
Ballard, Sarah;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Carter, Joshua A;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Fortney, Jonathan J;  Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA
Cochran, William D;  Department of Astronomy, University of Texas, Austin, USA
Endl, Michael;  Department of Astronomy, University of Texas, Austin, USA
Quinn, Samuel N;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Isaacson, Howard T;  Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
Fressin, François;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Buchhave, Lars A;  Neils Bohr Institute, University of Copenhagen, DK-2100 Denmark
Latham, David W;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Knutson, Heather A;  Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
Bryson, Stephen T;  NASA Ames Research Center, Moffett Field, CA 94035, USA
Torres, Guillermo;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Rowe, Jason F;  NASA Ames Research Center, Moffett Field, CA 94035, USA
Batalha, Natalie M;  San Jose State University, San Jose, CA 95192, USA
Borucki, William J;  NASA Ames Research Center, Moffett Field, CA 94035, USA
Brown, Timothy M;  Las Cumbres Observatory Global Telescope, Goleta, CA 93117, USA
Caldwell, Douglas A;  SETI Institute/NASA Ames Research Center, Moffett Field, CA 94035, USA
Christiansen, Jessie L;  NASA Ames Research Center, Moffett Field, CA 94035, USA
Deming, Drake;  Solar System Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
Fabrycky, Daniel C;  Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA
Ford, Eric B;  Department of Astronomy, University of Florida, Gainesville, FL 32611, USA
Gilliland, Ronald L;  Space Telescope Science Institute, Baltimore, MD 21218, USA
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Haas, Michaël R;  NASA Ames Research Center, Moffett Field, CA 94035, USA
Jenkins, Jon M;  SETI Institute/NASA Ames Research Center, Moffett Field, CA 94035, USA
Kinemuchi, Karen;  Bay Area Environmental Research Inst./NASA Ames Research Center, Moffett Field, CA 94035, USA
Koch, David;  NASA Ames Research Center, Moffett Field, CA 94035, USA
Lissauer, Jack J;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Lucas, Philip;  Centre for Astrophyiscs Research, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK
Mullally, Fergal;  SETI Institute/NASA Ames Research Center, Moffett Field, CA 94035, USA
MacQueen, Phillip J;  Department of Astronomy, University of Texas, Austin, USA
Marcy, Geoffrey W;  Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
Sasselov, Dimitar D;  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Seager, Sara;  Massachusetts Institute of Technology, Cambridge, MA 02159, USA
Still, Martin;  Bay Area Environmental Research Inst./NASA Ames Research Center, Moffett Field, CA 94035, USA
Tenenbaum, Peter;  SETI Institute/NASA Ames Research Center, Moffett Field, CA 94035, USA
Uddin, Kamal;  Orbital Sciences Corporation/NASA Ames Research Center, Moffett Field, CA 94035, USA
Winn, Joshua N;  Massachusetts Institute of Technology, Cambridge, MA 02159, USA
More authors (32 more) Less
Language :
English
Title :
The Hot-Jupiter Kepler-17b: Discovery, Obliquity from Stroboscopic Starspots, and Atmospheric Characterization
Publication date :
01 November 2011
Journal title :
Astrophysical Journal Supplement Series
ISSN :
0067-0049
eISSN :
1538-4365
Publisher :
Univ Chicago Press, Chicago, United States - Illinois
Volume :
197
Pages :
14
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
http://de.arxiv.org/abs/1107.5750
Available on ORBi :
since 07 January 2012

Statistics


Number of views
52 (1 by ULiège)
Number of downloads
135 (0 by ULiège)

Scopus citations®
 
139
Scopus citations®
without self-citations
85
OpenCitations
 
155

Bibliography


Similar publications



Contact ORBi