V1331 Cygni

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V1331 Cygni
A young star takes centre stage.jpg
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]
Distance 1,950 ± 30  ly
(597 ± 8  pc)
Details [3]
Mass 2.8  M☉
Radius 5  R☉
Temperature 5200  K
Other designations
V1331 Cyg, GSC 03596-00959, 2MASS J21010920+5021445
Database references
SIMBAD data

V1331 Cygni (also known as V1331 Cyg) is a young star in the located 1,950 light years from Earth on the constellation of Cygnus. V1331 Cyg is located in the dark nebula LDN 981. [4]

Six visual band light curves for V1331 Cygni, adapted from Mel'nikov (1997) V1331CygLightCurve.png
Six visual band light curves for V1331 Cygni, adapted from Mel'nikov (1997)

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. [6] 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]

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] [5]

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. 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.
  6. ↑ 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.
  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". Journal of the American Association of Variable Star Observers. 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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