Kepler-15b: a hot Jupiter enriched in heavy elements and the first Kepler mission planet confirmed with the Hobby-Eberly Telescope
Article
Article Title | Kepler-15b: a hot Jupiter enriched in heavy elements and the first Kepler mission planet confirmed with the Hobby-Eberly Telescope |
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ERA Journal ID | 1058 |
Article Category | Article |
Authors | Endl, Michael (Author), MacQueen, Phillip J. (Author), Cochran, William D. (Author), Brugamyer, Erik J. (Author), Buchhave, Lars A. (Author), Rowe, Jason (Author), Lucas, Phillip (Author), Isaacson, Howard (Author), Bryson, Steve (Author), Howell, Steve B. (Author), Fortney, Jonathan J. (Author), Hansen, Terese (Author), Borucki, William J. (Author), Caldwell, Douglas (Author), Christiansen, Jessie L. (Author), Ciardi, David R. (Author), Demory, Brice Olivier (Author), Everett, Mark (Author), Ford, Eric B. (Author), Haas, Michael R. (Author), Holman, Matthew J. (Author), Horch, Elliott (Author), Jenkins, Jon M. (Author), Koch, David J. (Author), Lissauer, Jack J. (Author), MacHalek, Pavel (Author), Still, Martin (Author), Welsh, William F. (Author), Sanderfer, Dwight T. (Author), Seader, Shawn E. (Author), Smith, Jeffrey C. (Author), Thompson, Susan E. (Author) and Twicken, Joseph D. (Author) |
Journal Title | Astrophysical Journal Supplement Series |
Journal Citation | 197 (1), pp. 13-23 |
Article Number | 13 |
Number of Pages | 11 |
Year | 2011 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0067-0049 |
1538-4365 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0067-0049/197/1/13 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0067-0049/197/1/13 |
Abstract | We report the discovery of Kepler-15b (KOI-128), a new transiting exoplanet detected by NASA's Kepler mission. The transit signal with a period of 4.94days was detected in the quarter 1 (Q1) Kepler photometry. For the first time, we have used the High Resolution Spectrograph (HRS) at the Hobby-Eberly Telescope (HET) to determine the mass of a Kepler planet via precise radial velocity (RV) measurements. The 24 HET/HRS RVs and 6 additional measurements from the Fibre-fed chelle Spectrograph spectrograph at the Nordic Optical Telescope reveal a Doppler signal with the same period and phase as the transit ephemeris. We used one HET/HRS spectrum of Kepler-15 taken without the iodine cell to determine accurate stellar parameters. The host star is a metal-rich ([Fe/H]= 0.36 ± 0.07) G-type main-sequence star with Teff = 5515 ± 124 K. The semi-amplitude K of the RV orbit is 78.7+8.5 -9.5ms-1, which yields a planet mass of 0.66 ± 0.1 M Jup. The planet has a radius of 0.96 ± 0.06R Jup and a mean bulk density of 0.9 ± 0.2 gcm-3. The radius of Kepler-15b is smaller than the majority of transiting planets with similar mass and irradiation level. This suggests that the planet is more enriched in heavy elements than most other transiting giant planets. For Kepler-15b we estimate a heavy element mass of 30-40 M ⊕. |
Keywords | planetary systems; stars; Kepler-15; KOI-128; KIC 11359879; 2MASS; J19444814+4908244; image processing;photometric; radial Velocities; spectroscopic |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of Texas at Austin, United States |
University of Copenhagen, Denmark | |
SETI Institute, United States | |
University of Hertfordshire, United Kingdom | |
University of California, United States | |
NASA Ames Research Center, United States | |
National Aeronautics and Space Administration (NASA), United States | |
Massachusetts Institute of Technology, United States | |
National Optical Astronomy Observatory, United States | |
University of Florida, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Southern Connecticut State University, United States | |
San Diego State University, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4330/kepler-15b-a-hot-jupiter-enriched-in-heavy-elements-and-the-first-kepler-mission-planet-confirmed-with-the-hobby-eberly-telescope
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