Hα Variability in PTFO 8-8695 and the possible direct detection of emission from a 2 million year old evaporating hot Jupiter
Article
Article Title | Hα Variability in PTFO 8-8695 and the possible direct detection of emission from a 2 million year old evaporating hot Jupiter |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Johns-Krull, Christopher M. (Author), Prato, Lisa (Author), McLane, Jacob N. (Author), Ciardi, David R. (Author), van Eyken, Julian C. (Author), Chen, Wei (Author), Stauffer, John R. (Author), Beichman, Charles A. (Author), Frazier, Sarah A. (Author), Boden, Andrew F. (Author), Morales-Calderon, Maria (Author) and Rebull, Luisa M. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 830 (1), pp. 14-28 |
Article Number | 15 |
Number of Pages | 15 |
Year | 2016 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/0004-637X/830/1/15 |
Web Address (URL) | http://iopscience.iop.org/article/10.3847/0004-637X/830/1/15 |
Abstract | We use high time cadence, high spectral resolution optical observations to detect excess Hα emission from the 2-3 Myr old weak-lined T Tauri star PTFO 8-8695. This excess emission appears to move in velocity as expected if it were produced by the suspected planetary companion to this young star. The excess emission is not always present, but when it is, the predicted velocity motion is often observed. We have considered the possibility that the observed excess emission is produced by stellar activity (flares), accretion from a disk, or a planetary companion; we find the planetary companion to be the most likely explanation. If this is the case, the strength of the Hα line indicates that the emission comes from an extended volume around the planet, likely fed by mass loss from the planet which is expected to be overflowing its Roche lobe. |
Keywords | accretion, accretion disks; line: profiles; stars: atmospheres; stars: formation; stars: magnetic field; 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 | Rice University, United States |
Lowell Observatory, United States | |
National Aeronautics and Space Administration (NASA), United States | |
California Institute of Technology (Caltech), United States | |
National Institute of Aerospace Technology, Spain | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q42z2/h-variability-in-ptfo-8-8695-and-the-possible-direct-detection-of-emission-from-a-2-million-year-old-evaporating-hot-jupiter
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