FY 3021 b

GJ 3021 b , also referred to as HD 1237 b , is a substellar object with a minimum mass of about 3.4 Jupiter masses and therefore an exoplanet candidate; it accompanies the sun-like star GJ 3021 . The proof of GJ 3021 b succeeded Naef et al. using the radial velocity method and was published in 2000.

Track properties

The major semi-axis of the orbit of GJ 3021 b measures around 0.5 astronomical units , the orbital eccentricity is relatively high at 0.5 and corresponds to a periapsis of 0.2 and an apoapsis of 0.7 astronomical units. Transferred to the dimensions of the solar system , the body would cut the orbits of Mercury and Venus . One complete cycle takes 134 days .

Physical Properties

GJ 3021 b has a minimum mass of 3.4 Jupiter masses (approx. 1100 earth masses ). As in most cases with objects discovered by measuring the radial velocity , the inclination of the orbit of the object is not known. In a study published in 2001, the analysis of data from the astrometry satellite Hipparcos determined an orbit inclination of 12 °, which would have meant that the mass of GJ 3021 b would have been above 16 Jupiter's masses. However, further analyzes showed that the Hipparcos data were not accurate enough to be able to make a statement about the inclination of the orbit.

literature

• Naef et al .: The CORALIE survey for southern extrasolar planets V. 3 new extrasolar planets. (2001). Astronomy and Astrophysics 375 (1): 205-218. doi : 10.1051 / 0004-6361: 20010841 article

Web links

• GJ 3021 b (English) - Entry in EPE , October 7, 2009

Individual evidence

1. ↑ Han et al. : Preliminary astrometric masses for proposed extrasolar planetary companions . In: The Astrophysical Journal . 548, No. 1, 2001, pp. L57 - L60.  ( Page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.  
2. ↑ Pourbaix, D. and Arenou, F .: Screening the Hipparcos astrometric based orbits of sub-stellar objects . In: Astronomy and Astrophysics . 372, 2001, pp. 935-944 . bibcode : 2001A & A ... 372..935P .