Gliese 880

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Gliese 880
Observation data
Epoch J2000       Equinox J2000
Constellation Pegasus
Right ascension 22h 56m 34.805s [1]
Declination +16° 33′ 12.36″ [1]
Apparent magnitude  (V)8.68 [2]
Characteristics
Evolutionary stage Main-sequence star
Spectral type M1.5V [3]
Apparent magnitude  (B)10.187 [2]
Apparent magnitude  (R)7.80 [2]
Apparent magnitude  (I)7.100 [2]
Apparent magnitude  (J)5.360±0.020 [2]
Apparent magnitude  (H)4.800±0.036 [2]
Apparent magnitude  (K)4.523±0.016 [2]
B−V color index 1.507±0.015 [2]
Astrometry
Radial velocity (Rv)−27.87±0.13 [1] km/s
Proper motion (μ)RA: −1034.733(26) mas/yr [1]
Dec.: −284.131(25) mas/yr [1]
Parallax (π)145.6234±0.0255  mas [1]
Distance 22.397 ± 0.004  ly
(6.867 ± 0.001  pc)
Absolute magnitude  (MV)9.50 [2]
Details [4]
Mass 0.569  M☉
Radius 0.548±0.005  R☉
Luminosity 0.05112±0.00074  L☉
Habitable zone inner limit0.218 AU
Habitable zone outer limit0.435 AU
Surface gravity (log g)4.77 [5]   cgs
Temperature 3,713±11  K
Metallicity [Fe/H]+0.20±0.05 [6]   dex
Rotation 37.5±0.1 d [7]
Rotational velocity (v sin i)2.07 [6]  km/s
Other designations
BD+15 4733, HD  216899, HIP  113296, Ross  671, 2MASS J22563497+1633130 [8]
Database references
SIMBAD data

Gliese 880 is a red dwarf star 22.4 light-years away in the northern constellation of Pegasus. No stellar companions to Gliese 880 have been discovered as of 2020. [9]

Search for planets

In June 2019, a candidate planet detected by radial velocity in orbit around Gliese 880 was reported in a preprint. This would have a minimum mass about 8.5 times that of Earth and orbit with a period of 39.4 days, [10] which is close to the star's rotation period of 37.5 days. [7] A 2024 study did not detect the exact period of 39.4 days, but detected two radial velocity signals at 37.2 and 40.5 days, which correspond to the stellar rotation and an alias of it. Presumably, the previously claimed planet candidate is an artifact of stellar activity. [11]

References

  1. 1 2 3 4 5 6 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.
  2. 1 2 3 4 5 6 7 8 9 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.
  3. ↑ Fuhrmeister, B.; et al. (2019), "The CARMENES search for exoplanets around M dwarfs. Period search in H{alpha}, Na I D, and Ca II IRT lines", Astronomy & Astrophysics, 623: A24, arXiv: 1901.05173 , Bibcode:2019A&A...623A..24F, doi:10.1051/0004-6361/201834483, S2CID   119064800
  4. ↑ Boyajian, Tabetha S.; von Braun, Kaspar; van Belle, Gerard; McAlister, Harold A.; Brummelaar, Theo A. ten; Kane, Stephen R.; Muirhead, Phil; Jones, Jeremy; White, Russel; Schaefer, Gail; Ciardi, David; Henry, Todd; López-Morales, Mercedes; Ridgway, Stephen; Gies, Douglas (2012-10-01). "Stellar Diameters and Temperatures II. Main Sequence K & M Stars". The Astrophysical Journal. 757 (2): 112. arXiv: 1208.2431 . doi:10.1088/0004-637X/757/2/112. ISSN   0004-637X.
  5. ↑ Abia, C.; et al. (2020), "The CARMENES search for exoplanets around M dwarfs: Rubidium abundances in nearby cool stars", Astronomy & Astrophysics, 642: A227, arXiv: 2009.00876 , Bibcode:2020A&A...642A.227A, doi:10.1051/0004-6361/202039032, S2CID   221447685
  6. 1 2 Lindgren, Sara; Heiter, Ulrike (2017). "Metallicity determination of M dwarfs. Expanded parameter range in metallicity and effective temperature". Astronomy and Astrophysics. 604: A97. arXiv: 1705.08785 . Bibcode:2017A&A...604A..97L. doi:10.1051/0004-6361/201730715. S2CID   119216828.
  7. 1 2 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 .
  8. ↑ "HD 216899". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2021-11-23.
  9. ↑ Lamman, Claire; et al. (2020), "Robo-AO M-dwarf Multiplicity Survey: Catalog", The Astronomical Journal, 159 (4): 139, arXiv: 2001.05988 , Bibcode:2020AJ....159..139L, doi: 10.3847/1538-3881/ab6ef1 , S2CID   210718832
  10. ↑ Barnes, J. R.; et al. (2019-06-11). "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". arXiv: 1906.04644 [astro-ph.EP].
  11. ↑ Mignon, L.; Delfosse, X.; et al. (September 2024). "Radial velocity homogeneous analysis of M dwarfs observed with HARPS". Astronomy & Astrophysics . 689: A32. arXiv: 2502.06513 . doi: 10.1051/0004-6361/202346570 .
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