HD 69830 b

HD 69830 b is a Neptune-mass or super-Earth-mass exoplanet orbiting the star HD 69830. It is 10 times more massive than Earth. It also orbits very close to its parent star and takes 82/3 days to complete an orbit.

HD 69830 b
Discovery
Discovered byC. Lovis et al.[1]
Discovery dateMay 18, 2006
Radial velocity
Orbital characteristics
0.0785 AU (11,740,000 km)
Eccentricity0.1 ± 0.04
8.667 ± 0.003 d
2,453,496.8 ± 0.06
340 ± 26
Semi-amplitude3.51 ± 0.15
StarHD 69830
Physical characteristics
Temperature~804 K

    This is likely to be a rocky planet, not a gas giant.[1] If it had formed as a gas giant, it would have stayed that way.[2]

    If HD 69830 b is a terrestrial planet, models predict that tidal heating would produce a heat flux at the surface of about 55 W/m2. This is 20 times that of Io.[3]

    References

    1. Lovis, Christophe; et al. (2006). "An extrasolar planetary system with three Neptune-mass planets" (PDF). Nature. 441 (7091): 305–309. arXiv:astro-ph/0703024. Bibcode:2006Natur.441..305L. doi:10.1038/nature04828. PMID 16710412.
    2. H. Lammer; et al. (2007). "The impact of nonthermal loss processes on planet masses from Neptunes to Jupiters" (PDF). Geophysical Research Abstracts. 9 (07850).
    3. Jackson, Brian; Richard Greenberg; Rory Barnes (2008). "Tidal Heating of Extra-Solar Planets". Astrophysical Journal. 681 (2): 1631. arXiv:0803.0026. Bibcode:2008ApJ...681.1631J. doi:10.1086/587641.


    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.