GJ 3634 b
Discovery | |
---|---|
Discovered by | X. Bonfils et al.[1] |
Discovery site | European Southern Observatory[1] |
Discovery date | February 7, 2011[2] |
Radial velocity method[1] | |
Orbital characteristics | |
0.0287 (± 0.0011)[3] AU | |
Eccentricity | 0.08[3] |
2.64561 d | |
Inclination | 59 +18 −24[3] |
Star | GJ 3634 |
Physical characteristics | |
Mass | 8.4+4.0 −1.5[3] ME |
Temperature | 565 K (292 °C; 557 °F)[4] |
GJ 3634 b (sometimes Gliese 3634 b) is a
Characteristics
Mass, radius and temperature
GJ 3634 b is estimated to be 8.4 times the mass of Earth,
Host star
The star was first catalogued in 1987, and was referenced on no more than five other occasions between its discovery and that of GJ 3634 b.[1] It was included in the preliminary edition of the 3rd Gliese–Jahreiß catalogue, which documents stars within twenty parsecs of Earth.
GJ 3634 has an apparent magnitude of 11.95. It cannot be seen with the naked eye.[3]
Orbit
The planet has a very short orbital period, and circles its host star every 2.64561 days at a distance of 0.0287 AU. GJ 3634 b has an eccentricity of 0.08, giving it a mostly circular orbit.[3] In comparison, planet Mercury lies 0.387 AU from the Sun, orbits every 87.97 days, and has an orbital eccentricity of 0.2056.[6]
Discovery
GJ 3634 b was one of a sample of over 300 very-low-mass stars targeted by astronomers in search of planets that may orbit such stars. Using the
The search for GJ 3634 b started with a single exposure taken with HARPS on March 25, 2009. The results helped verify that GJ 3634 was an ideal target for a planet search using the
Having discovered the planet, the astronomers worked to discover a transit event using the Infrared Array Camera of the Spitzer Space Telescope, as ground-based observations could prove difficult if GJ 3634 b was a rocky planet. While the observations did not suggest that GJ 3634 b transited its star, a few orbital parameters were discovered, yielding the planet's true mass, which cannot be collected solely by radial velocity measurements.[1]
The discovery of GJ 3634 b was reported in the journal
References
- ^ from the original on 2021-11-05. Retrieved 2021-11-05.
- ^ Jean Schneider (2011). "Interactive Extra-solar Planets Catalogue (Candidates detected by radial velocity or astrometry)". Extrasolar Planets Encyclopaedia. Archived from the original on 28 July 2012. Retrieved 30 April 2011.
- ^ a b c d e f g h Jean Schneider (2011). "Notes for star GJ 3634". Extrasolar Planets Encyclopaedia. Archived from the original on 29 July 2012. Retrieved 8 April 2011.
- ^ "Archived copy". Archived from the original on 2016-10-07. Retrieved 2021-11-05.
{{cite web}}
: CS1 maint: archived copy as title (link) - ^
Riedel, A. R.; Subasavage, J. P.; Finch, C. T.; Jao, W. C.; Henry, T. J.; Winters, J. G.; Brown, M. A.; Ianna, P. A.; Costa, E.; Mendez, R. A. (2010). "The Solar Neighborhood. XXII. Parallax Results from the CTIOPI 0.9 m Program: Trigonometric Parallaxes of 64 Nearby Systems with 0.′′5 ≤ μ ≤ 1.′′0 yr−1 (SLOWMO Sample)". S2CID 119183935.
- ^ David Williams (17 November 2010). "Mercury Fact Sheet". Goddard Space Flight Center. NASA. Archived from the original on 18 January 2017. Retrieved 30 April 2011.