Sozzetti, A.; Bonomo, A. S.; Biazzo, K.; Mancini, L.; Damasso, M.; Desidera, S.; Gratton, R.; Lanza, A. F.; Poretti, E.; Rainer, M.; Malavolta, L.; Affer, L.; Barbieri, M.; Bedin, L. R.; Boccato, C.; Bonavita, M.; Borsa, F.; Ciceri, S.; Claudi, R. U.; Gandolfi, D.; ... (2015). The GAPS programme with HARPS-N at TNG VI. The curious case of TrES-4b. Astronomy and astrophysics, 575(L15), L15. EDP Sciences 10.1051/0004-6361/201425570
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We update the TrES-4 system parameters using high-precision HARPS-N radial-velocity measurements and new photometric light curves. A combined spectroscopic and photometric analysis allows us to determine a spectroscopic orbit with a semi-amplitude K = 51 +/- 3 ms(-1). The derived mass of TrES-4b is found to be M-p = 0.49 +/- 0.04 M-Jup, significantly lower than previously reported. Combined with the large radius (R-p = 1.84(-0.09)(+0.08) R-Jup) inferred from our analysis, TrES-4b becomes the transiting hot Jupiter with the second-lowest density known. We discuss several scenarios to explain the puzzling discrepancy in the mass of TrES-4b in the context of the exotic class of highly inflated transiting giant planets.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences |
UniBE Contributor: |
Mordasini, Christoph |
Subjects: |
500 Science > 520 Astronomy 500 Science > 530 Physics |
ISSN: |
0004-6361 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
Katharina Weyeneth-Moser |
Date Deposited: |
17 Jun 2016 13:38 |
Last Modified: |
05 Dec 2022 14:56 |
Publisher DOI: |
10.1051/0004-6361/201425570 |
Web of Science ID: |
000360710400032 |
ArXiv ID: |
1501.06403 |
BORIS DOI: |
10.7892/boris.81946 |
URI: |
https://boris.unibe.ch/id/eprint/81946 |
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