GJ 758
GJ 758 is a G-type main sequence star located approximately 50 light years away from the Earth, in the constellation Lyra.[1] At about magnitude 6 it is a little too faint to be seen with the naked eye but can be easily seen through a small telescope or binoculars.
System
In November 2009, a team using the HiCIAO instrument of the Subaru Telescope imaged a substellar companion orbiting the star. This object, designated GJ 758 B, was initially estimated to be of approximately 10-40 Jupiter masses. A second candidate object was also detected, which was given the designation GJ 758 C.[3][4][5] Followup studies of the system have further constrained the mass range of GJ 758 B, indicating it to be a brown dwarf with approximately 30 to 40 Jupiter masses and revealed that GJ 758 C is a background star which is not physically associated with the GJ 758 system.[6]
See also
References
- ^ a b c d e f g h "NLTT 47754 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+182488. Retrieved 2009-12-13.
- ^ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal 687 (2): 1264–1293. Bibcode 2008ApJ...687.1264M. doi:10.1086/591785.
- ^ Thalmann, C.; Carson, J.; Janson, M.; Goto, M.; McElwain, M.; Egner, S.; Feldt, M.; Hashimoto, J.; Hayano, Y.; Henning, T.; Hodapp, K. W.; Kandori, R.; Klahr, H.; Kudo, T.; Kusakabe, N.; Mordasini, C.; Morino, J.-I.; Suto, H.; Suzuki, R.; Tamura, M. (2009). "Discovery of the Coldest Imaged Companion of a Sun-Like Star". The Astrophysical Journal Letters 707 (2): L123–L127. arXiv:0911.1127. Bibcode 2009ApJ...707L.123T. doi:10.1088/0004-637X/707/2/L123.
- ^ "Possible Planet Around a G-class Star". Centauri Dreams. 2009-12-04. http://www.centauri-dreams.org/?p=10517. Retrieved 2009-12-04.
- ^ "Discovery of an Exoplanet Candidate Orbiting a Sun-Like Star: Inaugural Observations with Subaru's New Instrument HiCIAO". Subaru Telescope. 2009-12-03. http://subarutelescope.org/Pressrelease/2009/12/03/index.html. Retrieved 2009-12-04.
- ^ a b Janson, M.; Carson, J.; Thalmann, C.; McElwain, M. W.; Goto, M.; Crepp, J.; Wisniewski, J.; Abe, L.; Brandner, W.; Burrows, A.; Egner, S.; Feldt, M.; Grady, C. A.; Golota, T.; Guyon, O.; Hashimoto, J.; Hayano, Y.; Hayashi, M.; Hayashi, S.; Henning, T.; Hodapp, K. W.; Ishii, M.; Iye, M.; Kandori, R.; Knapp, G. R.; Kudo, T.; Kusakabe, N.; Kuzuhara, M.; Matsuo, T.; Mayama, S.; Miyama, S.; Morino, J.-I.; Moro-Martín, A.; Nishimura, T.; Pyo, T.-S.; Serabyn, E.; Suto, H.; Suzuki, R.; Takami, M.; Takato, N.; Terada, H.; Tofflemire, B.; Tomono, D.; Turner, E. L.; Watanabe, M.; Yamada, T.; Takami, H.; Usuda, T.; Tamura, M. (2011). "Near-infrared Multi-band Photometry of the Substellar Companion GJ 758 B". The Astrophysical Journal 728 (2). arXiv:1011.5505. Bibcode 2011ApJ...728...85J. doi:10.1088/0004-637X/728/2/85.
External links
Media related to [//commons.wikimedia.org/wiki/Category:GJ_758 GJ 758] at Wikimedia Commons
Coordinates: 19h 23m 34.0s, +33° 13′ 19.1″
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GJ 758 system
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GJ 758
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| Brown dwarf |
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← «Bright» star systems within 50–60 light-years →
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Chi Eridani (57.0 ± 0.6 ly; 2 stars)
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Mu Arae (49.8 ± 0.6 ly; 1 star, 4 planets: planet d • planet e • planet b • planet c)‡ • 51 Pegasi ( 50.1 ± 0.6 ly; 1 star, 1 planet: planet b «Bellerophon»)‡ • HR 7368 ( 50.5 ± 0.5 ly; 1 star, 2 brown dwarfs: brown dwarf C • brown dwarf B) • HR 2007 ( 50.8 ± 0.9 ly; 1 star, 1 planet: planet b)‡ • HR 8323 ( 51.0 ± 0.6 ly; 1 star) • HR 7670 ( 51.8 ± 0.5 ly; 3 stars, 2 planets: planet c • planet b) • Psi⁵ Aurigae ( 53.9 ± 0.6 ly; 1 star) • HR 3538 ( 55.8 ± 0.8 ly; 1 star) • Iota Horologii ( 56.2 ± 0.5 ly; 1 star, 1 planet: planet b) • 37 Geminorum ( 56.3 ± 0.9 ly; 1 star) • Rho Coronae Borealis ( 56.8 ± 0.7 ly; 1 star, 1 planet: planet b) • GJ 3021 ( 57.5 ± 0.5 ly; 1 star, 1 planet: planet b) • 15 Sagittae ( 57.6 ± 0.6 ly; 1 star, 1 brown dwarf) • HR 7644 ( 57.8 ± 0.8 ly; 1 star, 1 planet: planet b) • HR 5534 ( 58.5 ± 0.9 ly; 1 star, 2 brown dwarfs) • Gliese 651 ( 58.9 ± 0.6 ly; 1 star, 1 planet: planet b) • 70 Virginis ( 59.1 ± 0.8 ly; 1 star, 1 planet: planet b) • Pi Mensae ( 59.4 ± 0.5 ly; 1 star, 1 planet: planet b)
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In left column are stellar classes of primary members of star systems. ‡Distance error margin extends out of declared distance interval. Italic are systems possibly located within declared distance interval, but probably not.
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