Improved orbital parameters and transit monitoring for HD 156846b
Article
Article Title | Improved orbital parameters and transit monitoring for HD 156846b |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Kane, Stephen R. (Author), Howard, Andrew W. (Author), Pilyavsky, Genady (Author), Mahadevan, Suvrath (Author), Henry, Gregory W. (Author), von Braun, Kaspar (Author), Ciardi, David R. (Author), Dragomir, Diana (Author), Fischer, Debra A. (Author), Jensen, Eric (Author), Laughlin, Gregory (Author), Ramirez, Solange V. (Author) and Wright, Jason T. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 733 (1), pp. 28-34 |
Article Number | 28 |
Number of Pages | 7 |
Year | 2011 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/733/1/28 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/733/1/28 |
Abstract | HD 156846b is a Jovian planet in a highly eccentric orbit (e = 0.85) with a period of 359.55 days. The pericenter passage at a distance of 0.16 AU is nearly aligned to our line of sight, offering an enhanced transit probability of 5.4% and a potentially rich probe of the dynamics of a cool planetary atmosphere impulsively heated during close approach to a bright star (V = 6.5). We present new radial velocity (RV) and photometric measurements of this star as part of the Transit Ephemeris Refinement and Monitoring Survey. The RV measurements from the Keck-High Resolution Echelle Spectrometer reduce the predicted transit time uncertainty to 20 minutes, an order of magnitude improvement over the ephemeris from the discovery paper. We photometrically monitored a predicted transit window under relatively poor photometric conditions, from which our non-detection does not rule out a transiting geometry. We also present photometry that demonstrates stability at the millimagnitude level over its rotational timescale. |
Keywords | planetary systems; stars; HD 156846; photometric techniques; radial velocities; |
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 | California Institute of Technology (Caltech), United States |
University of California, United States | |
Pennsylvania State University, United States | |
Tennessee State University, United States | |
National Aeronautics and Space Administration (NASA), United States | |
University of British Columbia, Canada | |
Massey University, New Zealand | |
Swarthmore College, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q433x/improved-orbital-parameters-and-transit-monitoring-for-hd-156846b
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