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Astrophysical Parameters and Habitable Zone of the Exoplanet Hosting Star GJ 581
- Publication Year :
- 2011
-
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 $0.299 \pm 0.010 R_{\odot}$. Literature photometry data are used to perform spectral energy distribution fitting in order to determine GJ 581's effective surface temperature $T_{\rm EFF}=3498 \pm 56$ K and its luminosity $L=0.01205 \pm 0.00024 L_{\odot}$. 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.<br />Comment: 10 pages, 3 figures, 2 tables; accepted for publication in ApJL
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1102.0237
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/2041-8205/729/2/L26