PV Cephei

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PV Cephei
A changing fan.jpg
PV Cep is the bright spot located at the edge of Gyulbudaghian’s Nebula
Credit: ESA/Hubble & NASA. Acknowledgement: Alexey Romashin
Observation data
Epoch J2000        Equinox J2000
Constellation Cepheus [1]
Right ascension 20h 45m 53.943s [2]
Declination +67° 57′ 38.66″ [2]
Apparent magnitude  (V)14.58 - 18.08 [3]
Characteristics
Spectral type A5Ve [4]
Variable type T Tau [5]
Astrometry
Proper motion (μ)RA: 8.228 [6]   mas/yr
Dec.: −1.976 [6]   mas/yr
Parallax (π)2.9100 ± 0.0593  mas [6]
Distance 1,120 ± 20  ly
(344 ± 7  pc)
Details
Mass 2.6 [7]   M☉
Radius 2.9 [7]   R☉
Luminosity 1 [8] - 100 [3]   L☉
Temperature 8,150 [8]   K
Age <1 [3]   Myr
Database references
SIMBAD data

PV Cephei is a variable star of Orion type located in the constellation of Cepheus at a distance of about 1,100 light-years from Earth. [9] In visible light it varies in brightness from magnitude 17 to 19, making it far too faint to be seen by the naked eye. [10]

A red band light curve for PV Cephei, adapted from Lorenzetti et al. (2011) PVCepLightCurve.png
A red band light curve for PV Cephei, adapted from Lorenzetti et al. (2011)

PV Cephei's variability was first detected by Martin Cohen, Leonard Vello Kuhi and Eugene A. Harlan, and was announced in 1977. [11] It was given its variable star designation in 1978. [12] The star is embedded within Gyulbudaghian's Nebula, a reflection nebula. As the star's brightness changes, the nebula's shape changes dramatically. [11] [13]

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References

  1. ↑ "A changing fan". ESA/Hubble Picture of the Week. Retrieved 23 April 2013.
  2. 1 2 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
  3. 1 2 3 Kun, M.; Szegedi-Elek, E.; Moór, A.; Kóspál, Á.; Ábrahám, P.; Apai, D.; Kiss, Z. T.; Klagyivik, P.; Magakian, T. Yu.; Mező, Gy.; Movsessian, T. A.; Pál, A.; Rácz, M.; Rogers, J. (2011). "Inner disc rearrangement revealed by dramatic brightness variations in the young star PV Cep". Monthly Notices of the Royal Astronomical Society. 413 (4): 2689. arXiv: 1101.2329 . Bibcode:2011MNRAS.413.2689K. doi: 10.1111/j.1365-2966.2011.18341.x . S2CID   118623750.
  4. ↑ Watson, C. L. (2006). "The International Variable Star Index (VSX)". The Society for Astronomical Sciences 25th Annual Symposium on Telescope Science. Held May 23–25. 25: 47. Bibcode:2006SASS...25...47W.
  5. ↑ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  6. 1 2 3 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.
  7. 1 2 Caratti o Garatti, A.; Garcia Lopez, R.; Weigelt, G.; Tambovtseva, L. V.; Grinin, V. P.; Wheelwright, H.; Ilee, J. D. (2013). "LBT/LUCIFER near-infrared spectroscopy of PV Cephei. An outbursting young stellar object with an asymmetric jet". Astronomy and Astrophysics. 554: A66. arXiv: 1304.6267 . Bibcode:2013A&A...554A..66C. doi:10.1051/0004-6361/201321418. S2CID   46977755.
  8. 1 2 Vioque, M.; Oudmaijer, R. D.; Baines, D.; Mendigutía, I.; Pérez-Martínez, R. (2018). "Gaia DR2 study of Herbig Ae/Be stars". Astronomy and Astrophysics. 620: A128. arXiv: 1808.00476 . Bibcode:2018A&A...620A.128V. doi:10.1051/0004-6361/201832870. S2CID   118928804.
  9. ↑ Saha, p.; Maheswar, G.; Mathew, B.; Kamath, U. S. (September 2021). "Star formation around three co-moving HAeBe stars in the Cepheus Flare". Astronomy & Astrophysics. 653: A142. arXiv: 2104.12061 . Bibcode:2021A&A...653A.142S. doi:10.1051/0004-6361/202039646 . Retrieved 27 October 2024.
  10. 1 2 Lorenzetti, D.; Giannini, T.; Larionov, V. M.; Arkharov, A. A.; Antoniucci, S.; Di Paola, A.; Konstantinova, T. S.; Kopatskaya, E. N.; Li Causi, G.; Nisini, B. (May 2011). "Simultaneous monitoring of the photometric and polarimetric activity of the young star PV Cep in the optical/near-infrared bands". The Astrophysical Journal. 732 (2): 69. arXiv: 1103.0183 . Bibcode:2011ApJ...732...69L. doi:10.1088/0004-637X/732/2/69. S2CID   250811804 . Retrieved 6 December 2021.
  11. 1 2 Cohen, M.; Kuhi, L. V.; Harlan, E. A. (August 1977). "A remarkable structural change in a faint cometary nebula". Astrophysical Journal. 215: L127–L129. Bibcode:1977ApJ...215L.127C. doi:10.1086/182494 . Retrieved 13 October 2024.
  12. ↑ Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (April 1978). "63rd Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 1414. Bibcode:1978IBVS.1414....1K . Retrieved 13 October 2024.
  13. ↑ Harrington, Phil. "Gyulbudaghian's Nebula". Astronomy. Firecrown Media. Retrieved 13 October 2024.


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