Astronomy:V1331 Cygni

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Short description: Star in constellation Cygnus

Coordinates: Sky map 21h 01m 9.21s, +50° 21′ 44.77″

V1331 Cygni
A young star takes centre stage.jpg
V1331 Cygni as photographed by the Hubble Space Telescope
Observation data
Equinox J2000.0]] (ICRS)
Constellation Cygnus
Right ascension  21h 01m 09.20684s[1]
Declination +50° 21′ 44.8033″[1]
Apparent magnitude (V) 11.99[2]
Characteristics
Astrometry
Proper motion (μ) RA: 0.980[1] mas/yr
Dec.: −3.783[1] mas/yr
Parallax (π)1.6760 ± 0.0237[1] mas
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]

Gallery

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  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. ↑ 3.0 3.1 Cite error: Invalid <ref> tag; no text was provided for refs named Petrov
  4. ↑ "A young star takes centre stage". https://www.spacetelescope.org/images/potw1509a/. 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. doi:10.1051/0004-6361/201527547. Bibcode: 2016A&A...590A.106C. 
  6. ↑ 6.0 6.1 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. https://adsabs.harvard.edu/pdf/1997AstL...23..799M. Retrieved 27 December 2021. 
  7. ↑ 7.0 7.1 "V1331 Cyg". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=12251. 
  8. ↑ GCVSTypes. "GCVS Variability Types". Sternberg Astronomical Institute. http://www.sai.msu.su/gcvs/gcvs/vartype.htm. 
  9. ↑ 9.0 9.1 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. https://ui.adsabs.harvard.edu/abs/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. doi:10.1134/1.1898408. Bibcode: 2005ARep...49..309I. https://link.springer.com/article/10.1134%2F1.1898408. Retrieved 22 December 2021. 




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