Astrophysical parameters and habitable zone of the exoplanet hosting star GJ 581
Article
Article Title | Astrophysical parameters and habitable zone of the exoplanet hosting star GJ 581 |
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ERA Journal ID | 45091 |
Article Category | Article |
Authors | von Braun, Kaspar (Author), Boyajian, Tabetha S. (Author), Kane, Stephen R. (Author), van Belle, Gerard T. (Author), Ciardi, David R. (Author), Lopez-Morales, Mercedes (Author), McAlister, Harold A. (Author), Henry, Todd J. (Author), Jao, Wei Chun (Author), Riedel, Adric R. (Author), Subasavage, John P. (Author), Schaefer, Gail (Author), ten Brummelaar, Theo A. (Author), Ridgway, Stephen (Author), Sturmann, Laszlo (Author), Sturmann, Judit (Author), Mazingue, Jude (Author), Turner, Nils H. (Author), Farrington, Chris (Author), Goldfinger, P. J. (Author) and Boden, Andrew F. (Author) |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 729 (2), pp. L26-L30 |
Article Number | L26 |
Number of Pages | 5 |
Year | 2011 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/2041-8205/729/2/L26 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/2041-8205/729/2/L26 |
Abstract | GJ 581 is an M dwarf host of a multiplanet system. We use long-baseline interferometric measurements from the CHARA Array, coupled with trigonometric parallax information, to directly determine its physical radius to be 0.299 0.010 R. Literature photometry data are used to perform spectral energy distribution fitting in order to determine GJ 581's effective surface temperature T EFF = 3498 56 K and its luminosity L = 0.01205 0.00024 L. From these measurements, we recompute the location and extent of the system's habitable zone and conclude that two of the planets orbiting GJ 581, planets d and g, spend all or part of their orbit within or just on the edge of the habitable zone. |
Keywords | infrared stars; planetary systems; fundamental parameters; GJ 581; late-type stars; interferometry |
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 | California Institute of Technology (Caltech), United States |
Georgia State University, United States | |
European Southern Observatory (ESO), Germany | |
National Aeronautics and Space Administration (NASA), United States | |
Carnegie Institution of Washington, United States | |
Cerro Tololo Inter-American Observatory, Chile | |
Mount Wilson Observatory, United States | |
National Optical Astronomy Observatory, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4340/astrophysical-parameters-and-habitable-zone-of-the-exoplanet-hosting-star-gj-581
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