GJ 3323
  GJ 3323 Location of GJ 3323 in the constellationEridanus | |
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 05h01m57.42613s[1] |
| Declination | −06° 56′ 46.3763″[1] |
| Apparent magnitude(V) | 12.20[2] |
| Characteristics | |
| Spectral type | M4.0Ve[3] |
| B−Vcolor index | +1.72[2] |
| Astrometry | |
| Radial velocity(Rv) | 42.309±0.0809[2]km/s |
| Proper motion(μ) | RA:−551.746mas/yr[1] Dec.:−533.648mas/yr[1] |
| Parallax(π) | 186.0466 ± 0.0277mas[1] |
| Distance | 17.531 ± 0.003ly (5.3750 ± 0.0008pc) |
| Absolute magnitude(MV) | 13.57[3] |
| Details[4] | |
| Mass | 0.1705±0.0044M☉ |
| Radius | 0.1862±0.0059R☉ |
| Luminosity | 0.003654±0.000052L☉ |
| Surface gravity(logg) | 5.07±0.07cgs |
| Temperature | 3,288±51K |
| Metallicity[Fe/H] | +0.01±0.16dex |
| Rotation | 88.50 d[5] |
| Rotational velocity(vsini) | 1.0±0.8[3]km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
GJ 3323(also known as LHS 1723) is a nearby single[7]starlocated in theequatorialconstellationEridanus,about 0.4° to the northwest of the naked eye starPsi Eridani.[8]It is invisible to the naked eye with anapparent visual magnitude12.20.[2]Parallaxmeasurements give a distance estimate of 17.5light-years(5.4parsecs) from theSun.[1]It is drifting further away with aradial velocityof +42.3 km/s.[2]Roughly 104,000 years ago, the star is believed to have come to within 7.34 ± 0.16 light-years of theSolar System.[9]
Thestellar classificationof GJ 3323 is M4.0Ve,[3]indicating that it is ared dwarf,withemission linesappearing in itsspectrum.[2]It is fully convective and a source ofX-ray emission.[5]The star has 17% of theSun's mass,19% of theradius of the Sun,and just 0.4% of theSun's luminosity.[4]
History of observations
[edit]The discovery name of this star isLP656-38,[10]which indicates that its discovery was published between 1963 and 1981 inUniversity of Minnesota,Minneapolis.[11]"LP" means "Luyten,Palomar".
GJ 3323 is known at least from 1979, when catalogues of high proper motion objectsLHSandNLTTwere published byWillem Jacob Luyten,and this object was included to these catalogues.[12][13]
Distance measurement
[edit]In 1982,Wilhelm Gliesepublished a photometric distance of GJ 3323 (161mas),[14]and in 1991 it was included in the 3rd preliminary version of catalogue of nearby stars byGlieseandJahreissas NN 3323 (also designated as GJ 3323) with photometric parallax163.0±26.0mas.[15]
Its trigonometric parallax remained unknown until 2006, when it was published by theRECONSteam. The parallax was187.92±1.26 mas.[16]
Planetary system
[edit]On March 15, 2017, two planets orbiting GJ 3323 were detected by theHARPS telescope,although the discovery team considers GJ 3323 c a planet candidate.[7]The inner planet, GJ 3323 b, may orbit within thecircumstellar habitable zoneof its star.[17]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.02+0.26 −0.25M🜨 |
0.03282+0.00054 −0.00056 |
5.3636±0.0007 | 0.23±0.11 | — | — |
| c | ≥2.31+0.50 −0.49M🜨 |
0.1264+0.0021 −0.0022 |
40.54+0.21 −0.19 |
0.17+0.21 −0.12 |
— | — |
References
[edit]- ^abcdeVallenari, A.; et al. (Gaia collaboration) (2023)."GaiaData 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.S2CID244398875. Gaia DR3 record for this sourceatVizieR.
- ^abcdefSoubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars".Astronomy and Astrophysics.616:A7.arXiv:1804.09370.Bibcode:2018A&A...616A...7S.doi:10.1051/0004-6361/201832795.S2CID52952408.
- ^abcdDavison, Cassy L.; et al. (2015). "A 3D Search for Companions to 12 Nearby M-Dwarfs".The Astronomical Journal.149(3): 106.arXiv:1501.05012.Bibcode:2015AJ....149..106D.doi:10.1088/0004-6256/149/3/106.S2CID9719725.
- ^abSchweitzer, A.; et al. (May 2019). "The CARMENES search for exoplanets around M dwarfs. Different roads to radii and masses of the target stars".Astronomy & Astrophysics.625:16.arXiv:1904.03231.Bibcode:2019A&A...625A..68S.doi:10.1051/0004-6361/201834965.S2CID102351979.A68.
- ^abWright, Nicholas J.; et al. (September 2018)."The stellar rotation-activity relationship in fully convective M dwarfs".Monthly Notices of the Royal Astronomical Society.479(2): 2351–2360.arXiv:1807.03304.Bibcode:2018MNRAS.479.2351W.doi:10.1093/mnras/sty1670.
- ^"LP 656-38".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2020-12-27.
- ^abcAstudillo-Defru, Nicola; Forveille, Thierry; Bonfils, Xavier; Ségransan, Damien; Bouchy, François; Delfosse, Xavier; et al. (2017)."The HARPS search for southern extra-solar planets. XLI. A dozen planets around the M dwarfs GJ 3138, GJ 3323, GJ 273, GJ 628, and GJ 3293".Astronomy and Astrophysics.602.A88.arXiv:1703.05386.Bibcode:2017A&A...602A..88A.doi:10.1051/0004-6361/201630153.S2CID119418595.
- ^Sinnott, Roger W.; Perryman, Michael A. C. (1997).Millennium Star Atlas.Vol. 1. Sky Publishing Corporation and the European Space Agency. p. 279.ISBN0-933346-84-0.
- ^Bobylev, V. V. (November 2010). "Stars outside the Hipparcos list closely encountering the Solar system".Astronomy Letters.36(11): 816–822.arXiv:1009.4856.Bibcode:2010AstL...36..816B.doi:10.1134/S1063773710110071.S2CID118512652.
- ^Kirkpatrick, J. Davy;et al. (2012). "Further Defining Spectral Type" Y "and Exploring the Low-mass End of the Field Brown Dwarf Mass Function".The Astrophysical Journal.753(2): 156.arXiv:1205.2122.Bibcode:2012ApJ...753..156K.doi:10.1088/0004-637X/753/2/156.S2CID119279752.
- ^Dictionary of Nomenclature of Celestial Objects.LP entry.SIMBAD.Centre de Données astronomiques de Strasbourg.
- ^Luyten, Willem Jacob (1979)."LHS 1723".LHS Catalogue, 2nd Edition.
- ^Luyten, Willem Jacob (1979)."NLTT 14393".NLTT Catalogue.
- ^Gliese, W. (March 1982). "Photometric parallaxes of nearby main-sequence stars with annual proper motion of 0.7 arcsec or more derived from Eggen's B, V and R, I data".Astronomy and Astrophysics Supplement Series.47:471–480.Bibcode:1982A&AS...47..471G.
- ^Gliese, W.; Jahreiß, H. (1991)."NN 3323".Preliminary Version of the Third Catalogue of Nearby Stars.Retrieved2014-11-23.
- ^Henry, T. J.; et al. (2006)."The Solar Neighborhood. XVII. Parallax Results from the CTIOPI 0.9 m Program: 20 New Members of the RECONS 10 Parsec Sample"(PDF).The Astronomical Journal.132(6): 2360–2371.arXiv:astro-ph/0608230.Bibcode:2006AJ....132.2360H.doi:10.1086/508233.S2CID15002841.
- ^"Open Exoplanet Catalogue - GJ 3323 b".www.openexoplanetcatalogue.com.Retrieved2024-03-09.
