THE PTF orion project: a possible planet transiting a T-Tauri star
Article
Article Title | THE PTF orion project: a possible planet transiting a T-Tauri star |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | van Eyken, Julian C. (Author), Ciardi, David R. (Author), von Braun, Kaspar (Author), Kane, Stephen R. (Author), Plavchan, Peter (Author), Bender, Chad F. (Author), Brown, Timothy M. (Author), Crepp, Justin R. (Author), Fulton, Benjamin J. (Author), Howard, Andrew W. (Author), Howell, Steve B. (Author), Mahadevan, Suvrath (Author), Marcy, Geoffrey W. (Author), Shporer, Avi (Author), Szkody, Paula (Author), Akeson, Rachel L. (Author), Beichman, Charles A. (Author), Boden, Andrew F. (Author), Gelino, Dawn M. (Author), Hoard, D. W. (Author), Ramirez, Solange V. (Author), Rebull, Luisa M. (Author), Stauffer, John R. (Author), Bloom, Joshua S. (Author), Cenko, S. Bradley (Author), Kasliwal, Mansi M. (Author), Kulkarni, Shrinivas R. (Author), Law, Nicholas M. (Author), Nugent, Peter E. (Author), Ofek, Eran O. (Author), Poznanski, Dovi (Author), Quimby, Robert M. (Author), Walters, Richard (Author), Grillmair, Carl J. (Author), Laher, Russ (Author), Levitan, David B. (Author), Sesar, Branimir (Author) and Surace, Jason A. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 755 (1), pp. 42-55 |
Article Number | 42 |
Number of Pages | 14 |
Year | 2012 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/755/1/42 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/755/1/42 |
Abstract | We report observations of a possible young transiting planet orbiting a previously known weak-lined T-Tauri star in the 7-10 Myr old Orion-OB1a/25-Ori region. The candidate was found as part of the Palomar Transient Factory (PTF) Orion project. It has a photometric transit period of 0.448413 ± 0.000040 days, and appears in both 2009 and 2010 PTF data. Follow-up low-precision radial velocity (RV) observations and adaptive optics imaging suggest that the star is not an eclipsing binary, and that it is unlikely that a background source is blended with the target and mimicking the observed transit. RV observations with the Hobby-Eberly and Keck telescopes yield an RV that has the same period as the photometric event, but is offset in phase from the transit center by - 0.22 periods. The amplitude (half range) of the RV variations is 2.4 km s-1 and is comparable with the expected RV amplitude that stellar spots could induce. The RV curve is likely dominated by stellar spot modulation and provides an upper limit to the projected companion mass of M psin i orb ≲ 4.8 ± 1.2 M Jup; when combined with the orbital inclination, i orb, of the candidate planet from modeling of the transit light curve, we find an upper limit on the mass of the planetary candidate of M p ≲ 5.5 ± 1.4 M Jup. This limit implies that the planet is orbiting close to, if not inside, its Roche limiting orbital radius, so that it may be undergoing active mass loss and evaporation. |
Keywords | CVSO 30; open clusters and associations; 25 Ori; planets and satellite detection; PTFO 8-8695; stars; pre-main sequence |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | National Aeronautics and Space Administration (NASA), United States |
California Institute of Technology (Caltech), United States | |
Pennsylvania State University, United States | |
Las Cumbres Observatory, United States | |
University of California, United States | |
University of Washington, United States | |
University of Toronto, Canada | |
Lawrence Berkeley National Laboratory, United States | |
Weizmann Institute of Science, Israel | |
Tel Aviv University, Israel | |
University of Tokyo, Japan | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q431z/the-ptf-orion-project-a-possible-planet-transiting-a-t-tauri-star
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