The initial announcement confused the planetary periodicity with the stellar periodicity of 40 days, thus giving a 10.24 day period for a 25 Earth-mass planet.[1] Subsequent readings filtered out the star's rotation, giving a more accurate reading of the planet's orbit and minimum mass.
The planet orbits inside the inner magnetosphere of its star. The quoted temperature of 450 K is a "thermal equilibrium" temperature.[2]
It is projected to be dominated by a rocky core, but the true mass is unknown. If the orbit is oriented such that we are viewing it at a nearly face-on angle, the planet may be significantly more massive than the lower limit. If so, it may have attracted a gas envelope like Uranus or Gliese 436 b.[2]
Referencesedit
^ abEndl, Michael; et al. (2008). "An m sin i = 24 M⊕ Planetary Companion to the Nearby M Dwarf GJ 176". The Astrophysical Journal. 673 (2): 1165–1168. arXiv:0709.0944. Bibcode:2008ApJ...673.1165E. doi:10.1086/524703.
^ abcdForveille, Thierry; Bonfils, Xavier; Delfosse, Xavier; Gillon, Michaël; Udry, Stéphane; Bouchy, François; Lovis, Christophe; Mayor, Michel; Pepe, Francesco; Perrier, Christian; Queloz, Didier; Santos, Nuno C.; Bertaux, Jean-Loup (2009). "The HARPS search for southern extra-solar planets. XIV. Gl 176b, a super-Earth rather than a Neptune, and at a different period". Astronomy and Astrophysics. 493 (2): 645–650. arXiv:0809.0750. Bibcode:2009A&A...493..645F. doi:10.1051/0004-6361:200810557.
. Exoplanets. Archived from the original on 2012-02-12. Retrieved 2008-08-02.
January 01, 1970
gliese, super, earth, exoplanet, approximately, light, years, away, constellation, taurus, this, planet, orbits, very, close, parent, dwarf, star, gliese, also, called, 285968, discoverydiscovered, byendl, forveille, discovery, dateseptember, 2007detection, me. Gliese 176 b is a super Earth exoplanet approximately 31 light years away in the constellation of Taurus This planet orbits very close to its parent red dwarf star Gliese 176 also called HD 285968 Gliese 176 bDiscoveryDiscovered byEndl 1 Forveille et al 2 Discovery dateSeptember 7 2007Detection methodradial velocityOrbital characteristicsSemi major axis0 066 0 001 AUEccentricity0 148 0 249 0 036Orbital period sidereal 8 776 0 001 0 002 dTime of periastron2450 839 760Argument of periastron150 6 42 2 104 5Semi amplitude4 49 1 00 0 23StarGliese 176Physical characteristicsTemperature 450 2 Gliese 176 b The initial announcement confused the planetary periodicity with the stellar periodicity of 40 days thus giving a 10 24 day period for a 25 Earth mass planet 1 Subsequent readings filtered out the star s rotation giving a more accurate reading of the planet s orbit and minimum mass The planet orbits inside the inner magnetosphere of its star The quoted temperature of 450 K is a thermal equilibrium temperature 2 It is projected to be dominated by a rocky core but the true mass is unknown If the orbit is oriented such that we are viewing it at a nearly face on angle the planet may be significantly more massive than the lower limit If so it may have attracted a gas envelope like Uranus or Gliese 436 b 2 References edit a b Endl Michael et al 2008 An m sin i 24 M Planetary Companion to the Nearby M Dwarf GJ 176 The Astrophysical Journal 673 2 1165 1168 arXiv 0709 0944 Bibcode 2008ApJ 673 1165E doi 10 1086 524703 a b c d Forveille Thierry Bonfils Xavier Delfosse Xavier Gillon Michael Udry Stephane Bouchy Francois Lovis Christophe Mayor Michel Pepe Francesco Perrier Christian Queloz Didier Santos Nuno C Bertaux Jean Loup 2009 The HARPS search for southern extra solar planets XIV Gl 176b a super Earth rather than a Neptune and at a different period Astronomy and Astrophysics 493 2 645 650 arXiv 0809 0750 Bibcode 2009A amp A 493 645F doi 10 1051 0004 6361 200810557 External links edit Notes for planet HD 285968 b Extrasolar Planets Encyclopaedia Archived from the original on 2010 04 07 HD 285968 Exoplanets Archived from the original on 2012 02 12 Retrieved 2008 08 02 Retrieved from https en wikipedia org w index php title Gliese 176 b amp oldid 1195240332, wikipedia, wiki, book, books, library,
