CoRoT-8

CoRoT-8
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Aquila[1]
Right ascension 19h 26m 21.2426s[2]
Declination +01° 25′ 35.178″[2]
Characteristics
Evolutionary stage main sequence star[3]
Spectral type K1V[3]
Variable type planetary transit
Astrometry
Proper motion (μ) RA: 13.683(28) mas/yr[2]
Dec.: −32.743(22) mas/yr[2]
Parallax (π)3.0903±0.0207 mas[2]
Distance1,055 ± 7 ly
(324 ± 2 pc)
Details
Mass0.89±0.04[4] M☉
Radius0.802±0.014[4] R☉
Luminosity0.41[2] L☉
Surface gravity (log g)4.58±0.01[4] cgs
Temperature5143±178[5] K
Metallicity [Fe/H]0.22±0.11[5] dex
Rotational velocity (v sin i)2±1[3] km/s
Age1.7+2.3
−1.4[4] Gyr
Database references
SIMBADdata
Exoplanet Archivedata

CoRoT-8 is a star in the constellation Aquila at a distance of about 1055 light-years away. At least one planet revolves around the star.

CoRoT-8 is an orange dwarf which has 0.88 solar masses and 0.77 solar radius.[6] By astronomical standards, this is already a rather young star compared to the Sun: its age is about 3 billion years. It got its name in honor of the CoRoT space telescope, with the help of which its planetary companion was discovered.

In 2010, a group of astronomers working within the CoRoT program announced the discovery of the planet CoRoT-8b in this system. It is a hot gas giant, similar in mass and size to Saturn. The planet orbits at a distance of about 0.06 AU from the parent star, while making a complete revolution in 6.21 days.[3][4][7]

The CoRoT-8 planetary system[4]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination
(°) 		Radius
b 0.218 ± 0.034 MJ 0.0636 ± 0.0014 6.212445 ± 0.000007 <0.19[7] 88.18±0.08 0.619+0.016
−0.017 RJ

References

  1. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. ^ 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.
  3. ^ a b c d Bordé, P.; et al. (September 2010). "Transiting exoplanets from the CoRoT space mission. XI. CoRoT-8b: a hot and dense sub-Saturn around a K1 dwarf". Astronomy and Astrophysics. 520: A66. arXiv:1008.0325. Bibcode:2010A&A...520A..66B. doi:10.1051/0004-6361/201014775. ISSN 0004-6361. S2CID 56357511.
  4. ^ a b c d e f Raetz, St; Heras, A. M.; Fernández, M.; Casanova, V.; Marka, C. (February 2019). "Transit analysis of the CoRoT-5, CoRoT-8, CoRoT-12, CoRoT-18, CoRoT-20, and CoRoT-27 systems with combined ground- and space-based photometry". Monthly Notices of the Royal Astronomical Society. 483 (1): 824–839. arXiv:1812.01536. Bibcode:2019MNRAS.483..824R. doi:10.1093/mnras/sty3085. ISSN 0035-8711.
  5. ^ a b Mortier, A.; Santos, N. C.; et al. (October 2013). "New and updated stellar parameters for 90 transit hosts. The effect of the surface gravity". Astronomy & Astrophysics. 558: A106. arXiv:1309.1998. Bibcode:2013A&A...558A.106M. doi:10.1051/0004-6361/201322240.
  6. ^ P. Bordé, F. Bouchy, M. Deleuil, J. Cabrera, L. Jorda, C. Lovis, S. Csizmadia, S. Aigrain, J. M. Almenara, R. Alonso, M. Auvergne, A. Baglin, P. Barge, W. Benz, A. S. Bonomo, H. Bruntt, L. Carone, S. Carpano, H. Deeg, R. Dvorak, A. Erikson, S. Ferraz-Mello, M. Fridlund, D. Gandolfi, J.-C. Gazzano, M. Gillon, E. Guenther, T. Guillot, P. Guterman, A. Hatzes, M. Havel, G. Hébrard, H. Lammer, A. Léger, M. Mayor, T. Mazeh, C. Moutou, M. Pätzold, F. Pepe, M. Ollivier, D. Queloz, H. Rauer, D. Rouan, B. Samuel, A. Santerne, J.Schneider, B. Tingley, S. Udry, J. Weingrill, G. Wuchterl (2010-08-02). "Transiting exoplanets from the CoRoT space mission". Astronomy and Astrophysics. 520: A66. arXiv:1008.0325. Bibcode:2010A&A...520A..66B. doi:10.1051/0004-6361/201014775. S2CID 56357511.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  7. ^ a b Bonomo, A. S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG . XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy and Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. ISSN 0004-6361. S2CID 118923163.
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