LP 71-82

Last updated
LP 71-82
LP71-82LightCurve.png
An R band light curve for LP 71-82 showing flares, adapted from Baran et al. (2013) [1]
Observation data
Epoch J2000.0        Equinox J2000.0
Constellation Draco
Right ascension 18h 02m 16.60s
Declination 64° 15′ 44.6″
Apparent magnitude  (V)13.51 [1]
Characteristics
Spectral type M5.0V
Apparent magnitude  (J)8.54 [2]
Astrometry
Proper motion (μ)RA: 196.394 mas/yr [3]
Dec.: -383.789 mas/yr [3]
Parallax (π)128.3057±0.0319  mas [3]
Distance 25.420 ± 0.006  ly
(7.794 ± 0.002  pc)
Details [4]
Mass 0.16±0.01  M☉
Radius 0.195±0.002  R☉
Luminosity 0.0033±0.0003  L☉
Habitable zone inner limit0.06
Habitable zone outer limit0.12
Surface gravity (log g)4.5 [5]   cgs
Temperature 3124±51  K
Rotation 0.28018±0.000010 d
Rotational velocity (v sin i)11.3±1.5 km/s
Age 0.5+1.1
−0.34  Gyr
Other designations
Gaia DR2 2161121135533953536, G 227-22, LP 71-82, LSPM J1802+6415, NLTT 45873, GSC 04209-01465, 2MASS J18021660+6415445
Database references
SIMBAD data

LP 71-82 is a red dwarf star, located in constellation Draco at 25.42 light-years from Earth. [3] Kinematically, it is probably belongs to the Ursa Major Moving Group. [6]

LP 71-82 is a flare star with a very strong activity, [1] with at least four flares detected by 2019. [5] Such activity is expected for a star with a short rotational period of just 6 hours. As a low mass star, it is fully convective. It is visible nearly pole-on, with rotational axis deflected from the Sun by 19±3° degrees. [4] The star has a magnetic fields in chromosphere in 3.8-4.7 kilogauss range. [7]

Multiplicity surveys did not find any stellar companions to LP 71-82 as in 2014. [8]

References

  1. 1 2 3 Mt. Suhora Survey – Searching for Pulsating M Dwarfs. III
  2. ↑ Reiners, A.; et al. (2017), "The CARMENES search for exoplanets around M dwarfs", Astronomy & Astrophysics, 612: A49, arXiv: 1711.06576 , doi:10.1051/0004-6361/201732054
  3. 1 2 3 4 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics . 649: A1. arXiv: 2012.01533 . Bibcode:2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657 . S2CID   227254300. (Erratum:  doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  4. 1 2 Robertson, Paul; Stefansson, Gudmundur; Mahadevan, Suvrath; Endl, Michael; Cochran, William D.; Beard, Corey; Bender, Chad F.; Diddams, Scott A.; Duong, Nicholas; Ford, Eric B.; Fredrick, Connor; Halverson, Samuel; Hearty, Fred; Holcomb, Rae; Juan, Lydia; Kanodia, Shubham; Lubin, Jack; Metcalf, Andrew J.; Monson, Andrew; Ninan, Joe P.; Palafoutas, Jonathan; Ramsey, Lawrence W.; Roy, Arpita; Schwab, Christian; Terrien, Ryan C.; Wright, Jason T. (2020), "Persistent Starspot Signals on M Dwarfs: Multiwavelength Doppler Observations with the Habitable-zone Planet Finder and Keck/HIRES", The Astrophysical Journal, 897 (2): 125, arXiv: 2005.09657 , Bibcode:2020ApJ...897..125R, doi: 10.3847/1538-4357/ab989f , S2CID   218718929
  5. 1 2 Rodríguez Martínez, Romy; Lopez, Laura A.; Shappee, Benjamin J.; Schmidt, Sarah J.; Jayasinghe, Tharindu; Kochanek, Christopher S.; Auchettl, Katie; Holoien, Thomas W.-S. (2019), "A Catalog of M-dwarf Flares with ASAS-SN", The Astrophysical Journal, 892 (2): 144, arXiv: 1912.05549 , doi: 10.3847/1538-4357/ab793a , S2CID   209323915
  6. ↑ Reliable probabilistic determination of membership in stellar kinematic groups in the young disk, Table 4
  7. ↑ Shulyak, D.; Reiners, A.; Nagel, E.; Tal-Or, L.; Caballero, J. A.; Zechmeister, M.; Béjar, V. J. S.; Cortés-Contreras, M.; Martin, E. L.; Kaminski, A.; Ribas, I.; Quirrenbach, A.; Amado, P. J.; Anglada-Escudé, G.; Bauer, F. F.; Dreizler, S.; Guenther, E. W.; Henning, T.; Jeffers, S. V.; Kürster, M.; Lafarga, M.; Montes, D.; Morales, J. C.; Pedraz, S. (2019), "Magnetic fields in M dwarfs from the CARMENES survey", Astronomy & Astrophysics, 626: A86, arXiv: 1904.12762 , Bibcode:2019A&A...626A..86S, doi:10.1051/0004-6361/201935315, S2CID   139101130
  8. ↑ Janson, Markus; Bergfors, Carolina; Brandner, Wolfgang; Kudryavtseva, Natalia; Hormuth, Felix; Hippler, Stefan; Henning, Thomas (2014), "The Astralux Multiplicity Survey: Extension to Late M-Dwarfs", The Astrophysical Journal, 789 (2): 102, arXiv: 1406.0535 , Bibcode:2014ApJ...789..102J, doi:10.1088/0004-637X/789/2/102, S2CID   118403775
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.