V1331 Cygni

V1331 Cygni as photographed by the Hubble Space Telescope
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 21h 01m 09.20684s[1]
Declination +50° 21′ 44.8033″[1]
Apparent magnitude (V) 11.99[2]
Characteristics
Spectral type G7-K0IV[3]
Astrometry
Proper motion (μ) RA: 0.980[1] mas/yr
Dec.: −3.783[1] mas/yr
Parallax (π)1.6760 ± 0.0237 mas[1]
Distance1,950 ± 30 ly
(597 ± 8 pc)
Details[3]
Mass2.8 M☉
Radius5 R☉
Temperature5200 K
Other designations
V1331 Cyg, GSC 03596-00959, 2MASS J21010920+5021445
Database references
SIMBADdata

V1331 Cygni (also known as V1331 Cyg) is a young star in the constellation Cygnus. V1331 Cyg is located in the dark nebula LDN 981.[4]

V1331 Cygni is most noted for having an arc-like reflection nebula surrounding it. This circumstellar disc is a great birthplace for young stars, which form in the cloud.[5] V1331 Cygni is heavily obscured by dust, so the properties of the central star are hard to deduce; however, it is estimated to have a radius five times that of the Sun and a mass of 2.8 M☉.[3]

Six visual band light curves for V1331 Cygni, adapted from Mel'nikov (1997)[6]

The General Catalog of Variable Stars classifies V1331 Cygni as an "INST" type variable, meaning a T Tauri star which shows rapid light variations.[7][8] Its visual band brightness varies from magnitude 13.08 to 10.58.[7] It is sometimes classified as a pre-FUOR star.[9] A semi-regular period of ~449 days has been reported.[9] Unlike many T Tauri stars, the mean brightness of V1331 Cygni remains nearly constant over long time periods.[10][6]

References

  1. 1 2 3 4 5 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.
  2. ↑ Zacharias, N. (2012). "The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". VizieR On-line Data Catalog. Bibcode:2012yCat.1322....0Z.
  3. 1 2 3 Petrov, P. P.; Kurosawa, R.; Romanova, M. M.; Gameiro, J. F.; Fernandez, M.; Babina, E. V.; Artemenko, S. A. (2014). "Facing the wind of the pre-FUor V1331 Cyg". Monthly Notices of the Royal Astronomical Society. 442 (4): 3643. arXiv:1406.1660. Bibcode:2014MNRAS.442.3643P. doi:10.1093/mnras/stu1131.
  4. ↑ "A young star takes centre stage". Hubble Space Telescope. Retrieved 10 May 2019.
  5. ↑ Choudhary, A.; Stecklum, B.; Linz, Hendrik (2016). "Hubble imaging of V1331 Cygni: proper motion study of its circumstellar structures". Astronomy & Astrophysics. 590: A106. arXiv:1604.03667. Bibcode:2016A&A...590A.106C. doi:10.1051/0004-6361/201527547. S2CID 118448991.
  6. 1 2 Mel'nikov, S. Yu. (1997). "Quasi-periodic light variations in four Herbig Ae/Be stars". Pis'ma Astron. Zh. 23 (6): 799–810. Bibcode:1997AstL...23..799M. Retrieved 27 December 2021.
  7. 1 2 "V1331 Cyg". The International Variable Star Index. AAVSO. Retrieved 22 December 2021.
  8. ↑ GCVSTypes. "GCVS Variability Types". GCVS. Sternberg Astronomical Institute. Retrieved 22 December 2021.
  9. 1 2 Hamilton, Joshua R. (June 2021). "Light Curve Analysis of 185 YSOs: New Periods Discovered for 9 Stars". JAAVSO. 49 (1): 49–57. Bibcode:2021JAVSO..49...49H. Retrieved 22 December 2021.
  10. ↑ Ismailov, N. Z. (April 2005). "A new classification scheme for T Tauri light curves". Astronomy Reports. 49 (4): 309–315. Bibcode:2005ARep...49..309I. doi:10.1134/1.1898408. S2CID 122913721. Retrieved 22 December 2021.


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