Possible binary star system in the constellation Grus
HD 213240 is a possible binary star [ 10] constellation Grus . It has an apparent visual magnitude of 6.81,[ 2] light years from the Sun based on parallax . The primary has an absolute magnitude of 3.77.[ 2]
This is an ordinary G-type main-sequence star with a stellar classification of G0/G1V.[ 3] metal-rich star with an age that has been calculated as being anywhere from 2.7 to 4.6 billion years.[ 10] [ 5] mass of the Sun and 1.56[ 6] Sun's radius . It is spinning with a projected rotational velocity of 3.5 km/s.[ 8] [ 6] luminosity of the Sun from its photosphere at an effective temperature of 5,921 K.[ 6]
A red dwarf companion star was detected in 2005 with a projected separation of 3,898 AU .[ 10]
Planetary system
The Geneva extrasolar planet search team discovered a planet orbiting this star in 2001.[ 11] radial velocity , only its minimum mass was initially known, and there was a 5% chance of it being massive enough to be a brown dwarf .[ 10] astrometry , confirming its planetary nature.[ 12]
See also
References
^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source at VizieR .^ a b c d e f Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv :1108.4971 Bibcode :2012AstL...38..331A . doi :10.1134/S1063773712050015 . S2CID 119257644 . ^ a b Houk, N. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars , vol. 2, Dept. of Astronomy, University of Michigan, Bibcode :1978mcts.book.....H . ^ Lodieu, N.; et al. (September 2014). "Binary frequency of planet-host stars at wide separations. A new brown dwarf companion to a planet-host star". Astronomy & Astrophysics . 569 : 14. arXiv :1408.1208 Bibcode :2014A&A...569A.120L . doi :10.1051/0004-6361/201424210 . S2CID 118516214 . A120. ^ a b Stassun, Keivan G.; et al. (March 2017). "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes" . The Astronomical Journal . 153 (3): 20. arXiv :1609.04389 Bibcode :2017AJ....153..136S . doi :10.3847/1538-3881/aa5df3 S2CID 119219062 . 136. ^ a b c d e f Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties" . Astronomy & Astrophysics 616 . A1. arXiv :1804.09365 Bibcode :2018A&A...616A...1G doi :10.1051/0004-6361/201833051 Gaia DR2 record for this source at VizieR .^ a b Bonfanti, A.; et al. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics . 585 : A5, 14 pp. arXiv :1511.01744 Bibcode :2016A&A...585A...5B . doi :10.1051/0004-6361/201527297 . S2CID 53971692 . ^ a b Delgado Mena, E.; et al. (April 2015), "Li abundances in F stars: planets, rotation, and Galactic evolution", Astronomy & Astrophysics , 576 : 24, arXiv :1412.4618 Bibcode :2015A&A...576A..69D , doi :10.1051/0004-6361/201425433 , S2CID 56051637 , A69 ^ "HD 213240" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2018-07-27 .^ a b c d Mugrauer, M.; et al. (2005). "Four New Wide Binaries Among Exoplanet Host Stars". Astronomy and Astrophysics 440 (3): 1051– 1060. arXiv :astro-ph/0507101 Bibcode :2005A&A...440.1051M . doi :10.1051/0004-6361:20042297 . S2CID 14065040 . ^ Santos, N. C.; et al. (2001). "The CORALIE survey for southern extra-solar planets VI. New long period giant planets around HD 28185 and HD 213240". Astronomy and Astrophysics . 379 (3): 999– 1004. arXiv :astro-ph/0106255 Bibcode :2001A&A...379..999S . doi :10.1051/0004-6361:20011366 . S2CID 59061741 . ^ a b Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics 23 (5): 055022. arXiv :2303.12409 Bibcode :2023RAA....23e5022X . doi :10.1088/1674-4527/accb7e . S2CID 257663647 .
