Gliese 22, also catalogued V547 Cassiopeiae or ADS 440, is a hierarchical star system approximately 33 light-years away in the constellation of Cassiopeia. The system consists of pair of red dwarf stars, Gliese 22A and Gliese 22C, orbited by a third red dwarf Gliese 22B in an outer orbit of about 223 years.

The discovery of flare activity on Gliese 22A was announced by Bjørn Ragnvald Pettersen in 1975,[1] which led to it being given a variable star designation, V547 Cassiopeiae, in 1977.[11]

Planetary system

As of 2008, it was announced that a possible extrasolar planet, Gliese 22B b, orbits Gliese 22B but this is currently unconfirmed. The study in 2011 has indicated the orbit of the purported planet is stable.[12]

The Gliese 22 B planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b (unconfirmed) 16 MJ — 5,500 0 — —

References

  1. ^ a b Pettersen, B. R. (June 1975). "Discovery of flare activity on BD +66 34 (= Gliese 22 A)". Astronomy and Astrophysics. 41: 113. Bibcode:1975A&A....41..113P. Archived from the original on 27 November 2021. Retrieved 27 November 2021.
  2. ^ van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
  3. ^ Docobo, J. A.; Tamazian, V. S.; Balega, Y. Y.; Andrade, M.; Schertl, D.; Weigelt, G.; Campo, P.; Palacios, M. (2008). "A methodology for studying physical and dynamical properties of multiple stars. Application to the system of red dwarfs Gl 22". Astronomy and Astrophysics. 478 (1): 187. Bibcode:2008A&A...478..187D. doi:10.1051/0004-6361:20078594.
  4. ^ Benedict, G. F.; et al. (2016). "The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence M Dwarfs". The Astronomical Journal. 152 (5). 141. arXiv:1608.04775. Bibcode:2016AJ....152..141B. doi:10.3847/0004-6256/152/5/141.
  5. ^ McCarthy, D. W.; Henry, Todd J.; McLeod, Brian; Christou, Julian C. (1991). "The Low-Mass Companion of Gliese 22A: First Results of the Steward Infrared Speckle Camera". The Astronomical Journal. 101: 214. Bibcode:1991AJ....101..214M. doi:10.1086/115681.
  6. ^ a b Newton, Elisabeth R.; Irwin, Jonathan; Charbonneau, David; Berlind, Perry; Calkins, Michael L.; Mink, Jessica (2017). "The Hα Emission of Nearby M Dwarfs and its Relation to Stellar Rotation". The Astrophysical Journal. 834 (1): 85. arXiv:1611.03509. Bibcode:2017ApJ...834...85N. doi:10.3847/1538-4357/834/1/85. S2CID 55000202.
  7. ^ McLean, M.; Berger, E.; Reiners, Ansgar (February 2012). "The Radio Activity-Rotation Relation of Ultracool Dwarfs". The Astrophysical Journal. 746 (1): 23. arXiv:1108.0415. Bibcode:2012ApJ...746...23M. doi:10.1088/0004-637X/746/1/23. S2CID 119159519.
  8. ^ Houdebine, Éric R.; Mullan, D. J.; Doyle, J. G.; de la Vieuville, Geoffroy; Butler, C. J.; Paletou, F. (2019). "The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs". The Astronomical Journal. 158 (2): 56. arXiv:1905.07921. Bibcode:2019AJ....158...56H. doi:10.3847/1538-3881/ab23fe. S2CID 159041104.
  9. ^ Mann, Andrew W.; Dupuy, Trent; Kraus, Adam L.; Gaidos, Eric; Ansdell, Megan; Ireland, Michael; Rizzuto, Aaron C.; Hung, Chao-Ling; Dittmann, Jason; Factor, Samuel; Feiden, Gregory; Martinez, Raquel A.; Ruíz-Rodríguez, Dary; Chia Thao, Pa (2019), "How to constrain your M dwarf. II. The Mass-Luminosity-Metallicity relation from 0.075 to 0.70 solar masses", The Astrophysical Journal, 871 (1): 63, arXiv:1811.06938, Bibcode:2019ApJ...871...63M, doi:10.3847/1538-4357/aaf3bc, S2CID 119372932
  10. ^ Jeffers, S. V.; Schöfer, P.; Lamert, A.; Reiners, A.; Montes, D.; Caballero, J. A.; Cortés-Contreras, M.; Marvin, C. J.; Passegger, V. M.; Zechmeister, M.; Quirrenbach, A.; Alonso-Floriano, F. J.; Amado, P. J.; Bauer, F. F.; Casal, E.; Diez Alonso, E.; Herrero, E.; Morales, J. C.; Mundt, R.; Ribas, I.; Sarmiento, L. F. (2018). "CARMENES input catalogue of M dwarfs. III. Rotation and activity from high-resolution spectroscopic observations". Astronomy and Astrophysics. 614: A76. arXiv:1802.02102. Bibcode:2018A&A...614A..76J. doi:10.1051/0004-6361/201629599. S2CID 56147445.
  11. ^ Kukarkin, B. V.; Kholopov, P. N.; Fedorovich, V. P.; Kireyeva, N. N.; Kukarkina, N. P.; Medvedeva, G. I.; Perova, N. B. (March 1977). "62nd Name-List of Variable Stars". Information Bulletin on Variable Stars. 1248 (1248): 1. Bibcode:1977IBVS.1248....1K. Retrieved 28 August 2024.
  12. ^ Andrade, Manuel; Docobo, José A. (2011). "On the dynamical stability of the very low-mass object Gliese 22 Bb". Icarus. 215 (2): 712. Bibcode:2011Icar..215..712A. doi:10.1016/j.icarus.2011.07.008.
Allikas: http://en.wikipedia.org/wiki/Gliese_22
No tags for this post.