astro.wikisort.org - StarGliese 163 is a faint red dwarf star with multiple exoplanetary companions in the southern constellation of Dorado. Other stellar catalog names for it include HIP 19394 and LHS 188.[10] It is too faint to be visible to the naked eye, having an apparent visual magnitude of 11.79[2] and an absolute magnitude of 10.91.[2] This system is located at a distance of 49.4 light-years from the Sun based on parallax measurements.[1] Judging by its space velocity components, it is most likely a thick disk star.[3]
Red dwarf star in the constellation Dorado
Gliese 163
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Dorado |
Right ascension |
04h 09m 15.668s[1] |
Declination |
−53° 22′ 25.29″[1] |
Apparent magnitude (V) |
11.79[2] |
Characteristics |
Spectral type |
M3.5V[3] |
B−V color index |
1.480±0.008[2] |
Astrometry |
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|
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Radial velocity (Rv) | +36.9±10.0[2] km/s |
Proper motion (μ) | RA: +1046.141 mas/yr[1] Dec.: +584.130 mas/yr[1] |
Parallax (π) | 66.0714 ± 0.0314 mas[1] |
Distance | 49.36 ± 0.02 ly (15.135 ± 0.007 pc) |
Absolute magnitude (MV) | 10.91[2] |
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Details |
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|
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Mass | 0.405±0.010[4] M☉ |
Radius | 0.409+0.017 −0.016[4] R☉ |
Luminosity | 0.0196±0.001[5] L☉ |
Surface gravity (log g) | 4.87[6] cgs |
Temperature | 3,460+76 −74[4] K |
Metallicity [Fe/H] | 0.1±0.1[5] dex |
Rotation | 61.0±0.3 d[7] |
Rotational velocity (v sin i) | 0.85[8] km/s |
Age | 5[9] Gyr |
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Other designations |
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GJ 163, HIP 19394, LHS 188, LTT 1881 [10] |
Database references |
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SIMBAD | data |
This is a small M-type main-sequence star with a stellar classification of M3.5V.[3] It has a relatively low activity level for a red dwarf of its mass, suggesting it is an old star with an age of at least two billion years.[5] This star has 41% of the mass and radius of the Sun.[4] It is spinning slowly with a projected rotational velocity of 0.85 km/s[8] and has a rotation period of 61 days.[7] The star is radiating just 2%[5] of the luminosity of the Sun from its photosphere at an effective temperature of 3,460 K.[4]
Planetary system
In September 2012, astronomers using the HARPS instrument announced the discovery of two planets orbiting Gliese 163.[11][12] The first planet, Gliese 163 b, is a super-Earth or mini-Neptune with an orbital period of 9 days, therefore far too hot to be considered habitable. However, Gliese 163 c, with an orbital period of 26 days and a minimum mass of 6.9 Earth masses, was considered to potentially be in the star's habitable zone, although it is hotter than Earth, with a temperature of 60 deg. C (140 deg. F). It has an eccentricity estimated to be about 0.03, giving it a fairly circular orbit. Evidence was also found for a third planet orbiting further out than c and b.[11][12]
In June 2013, it was concluded that at least 3 planets orbit around the star with a fourth planet being a possibility,[5] and in a paper submitted to arXiv in June 2019, that and another planet were found, thus giving the system a total of five planets.[13]
The Gliese 163 planetary system[14][13]
Companion (in order from star) |
Mass |
Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
Inclination |
Radius |
b |
≥9.9±2.3 M🜨 |
0.060+0.005 −0.006 |
8.6312+0.0023 −0.0021 |
0.02+0.12 −0.02 |
— |
— |
c |
≥7.6+2.9 −2.3 M🜨 |
0.124+0.010 −0.013 |
25.637±0.042 |
0.03+0.18 −0.03 |
— |
— |
f |
≥6.8±4.4 M🜨 |
0.326+0.027 −0.034 |
109.5+1.6 −1.4 |
0.04+0.23 −0.04 |
— |
— |
e |
≥13.6+8.2 −6.5 M🜨 |
0.700±0.066 |
349+12 −10 |
0.03+0.25 −0.03 |
— |
— |
d |
≥20.2±7.6 M🜨 |
1.021+0.088 −0.118 |
604+29 −24 |
0.02+0.22 −0.02 |
— |
— |
References
- 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.
- 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
- Reid, I. Neill; et al. (October 1995). "The Palomar/MSU Nearby-Star Spectroscopic Survey. I. The Northern M Dwarfs -Bandstrengths and Kinematics". Astronomical Journal. 110: 1838. Bibcode:1995AJ....110.1838R. doi:10.1086/117655.
- Pineda, J. Sebastian; et al. (September 2021). "The M-dwarf Ultraviolet Spectroscopic Sample. I. Determining Stellar Parameters for Field Stars". The Astrophysical Journal. 918 (1): 23. arXiv:2106.07656. Bibcode:2021ApJ...918...40P. doi:10.3847/1538-4357/ac0aea. S2CID 235435757. 40.
- Tuomi, M.; Anglada-Escudé, G. (2013). "Up to four planets around the M dwarf GJ 163". Astronomy & Astrophysics. 556: A111. arXiv:1306.1717. doi:10.1051/0004-6361/201321174. S2CID 16214668.
- Santos, N. C.; et al. (August 2013). "SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs. I. New atmospheric parameters and masses for 48 stars with planets". Astronomy & Astrophysics. 556: 11. arXiv:1307.0354. Bibcode:2013A&A...556A.150S. doi:10.1051/0004-6361/201321286. S2CID 55237847. A150.
- Suárez Mascareño, A.; et al. (September 2015), "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators", Monthly Notices of the Royal Astronomical Society, 452 (3): 2745–2756, arXiv:1506.08039, Bibcode:2015MNRAS.452.2745S, doi:10.1093/mnras/stv1441, S2CID 119181646
- Houdebine, E. R.; Mullan, D. J.; Paletou, F.; Gebran, M.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2016). "Rotation-Activity Correlations in K and M Dwarfs. I. Stellar Parameters and Compilations of v sin I and P/Sin I for a Large Sample of Late-K and M Dwarfs". The Astrophysical Journal. 822 (2): 97. arXiv:1604.07920. Bibcode:2016ApJ...822...97H. doi:10.3847/0004-637X/822/2/97. S2CID 119118088.
- Linsky, Jeffrey L.; et al. (October 2020). "The Relative Emission from Chromospheres and Coronae: Dependence on Spectral Type and Age". The Astrophysical Journal. 902 (1): 15. arXiv:2009.01958. Bibcode:2020ApJ...902....3L. doi:10.3847/1538-4357/abb36f. S2CID 221507685. 3.
- "L 229-91". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-16.
- Méndez, Abel (August 29, 2012). "A Hot Potential Habitable Exoplanet around Gliese 163". University of Puerto Rico at Arecibo (Planetary Habitability Laboratory). Retrieved September 20, 2012.
- Redd, Nola Taylor (September 20, 2012). "Newfound Alien Planet a Top Contender to Host Life". Space.com. Retrieved September 20, 2012.
- Tuomi, M.; et al. (June 2019). "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". arXiv:1906.04644. Bibcode:2019arXiv190604644T.
- Bonfils, Xavier; et al. (5 August 2013). "The HARPS search for southern extra-solar planets". Astronomy & Astrophysics. 556: A110. arXiv:1306.0904. Bibcode:2013A&A...556A.110B. doi:10.1051/0004-6361/201220237. S2CID 118456453.
Constellation of Dorado |
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На других языках
[de] Gliese 163
Gliese 163 ist ein Roter Zwerg der Spektralklasse M3.5, welcher sich rund 49 Lichtjahre (15 pc) von der Sonne entfernt im Sternbild Schwertfisch befindet und wohl von 5 planetaren Begleitern umrundet wird. Das Objekt hat eine scheinbare Helligkeit von 11,8 mag und eine absolute Helligkeit von +11 mag.
- [en] Gliese 163
[ru] GJ 163
GJ 163 (Gliese 163/Глизе 163) — одиночная звезда, которая находится в созвездии Золотая Рыба на расстоянии около 48,9 световых лет (15 пк) от Солнца[1]. Вокруг звезды обращаются, как минимум, три планеты.
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