KEPLER-424 b: A "LONELY" HOT JUPITER THAT FOUND A COMPANION

被引：30

作者：

Endl, Michael ^{[1
]}

Caldwell, Douglas A. ^{[2
]}

Barclay, Thomas ^{[2
,3
]}

Huber, Daniel ^{[2
,4
]}

Isaacson, Howard ^{[5
]}

Buchhave, Lars A. ^{[6
,7
]}

Brugamyer, Erik ^{[8
]}

Robertson, Paul ^{[9
]}

Cochran, William D. ^{[1
,8
]}

MacQueen, Phillip J. ^{[1
,8
]}

Havel, Mathieu ^{[2
]}

Lucas, Phillip ^{[10
]}

Howell, Steve B. ^{[2
]}

Fischer, Debra ^{[11
]}

Quintana, Elisa ^{[2
]}

Ciardi, David R. ^{[12
]}

机构：

[1] Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA

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

[3] Bay Area Environm Res Inst, Petaluma, CA 94952 USA

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

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

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

[7] Univ Copenhagen, Nat Hist Museum Denmark, Ctr Star & Planet Format, DK-1350 Copenhagen, Denmark

[8] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA

[9] Penn State Univ, Ctr Exoplanets & Habitable Worlds, Dept Astron & Astrophys, University Pk, PA 16802 USA

[10] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England

[11] Yale Univ, Dept Astron, New Haven, CT 06520 USA

[12] CALTECH, NASA Exoplanet Sci Inst, Pasadena, CA 91125 USA

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 795卷 / 02期

关键词：

planetary systems; stars:; individual; KOI-22; KOI-127; KOI-135; KOI-183; KOI-214; Kepler-43; Kepler-77); techniques: radial velocities; HOST STARS; GIANT; EVOLUTION; CANDIDATES; PLANETS; I; PERTURBATIONS; METALLICITY; CONSTRAINTS; EXOPLANETS;

D O I：

10.1088/0004-637X/795/2/151

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Hot Jupiter systems provide unique observational constraints for migration models in multiple systems and binaries. We report on the discovery of the Kepler-424 (KOI-214) two-planet system, which consists of a transiting hot Jupiter (Kepler-424b) in a 3.31 day orbit accompanied by a more massive outer companion in an eccentric (e = 0.3) 223 day orbit. The outer giant planet, Kepler-424c, is not detected transiting the host star. The masses of both planets and the orbital parameters for the second planet were determined using precise radial velocity (RV) measurements from the Hobby-Eberly Telescope (HET) and its High Resolution Spectrograph (HRS). In stark contrast to smaller planets, hot Jupiters are predominantly found to be lacking any nearby additional planets; they appear to be "lonely". This might be a consequence of these systems having a highly dynamical past. The Kepler-424 planetary system has a hot Jupiter in a multiple system, similar to. Andromedae. We also present our results for Kepler-422 (KOI-22), Kepler-77 (KOI-127), Kepler-43 (KOI-135), and Kepler-423 (KOI-183). These results are based on spectroscopic data collected with the Nordic Optical Telescope (NOT), the Keck 1 telescope, and HET. For all systems, we rule out false positives based on various follow-up observations, confirming the planetary nature of these companions. We performed a comparison with planetary evolutionary models which indicate that these five hot Jupiters have heavy element contents between 20 and 120 M-circle plus.

引用

页数：13

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