PV Cephei

PV Cephei

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 ICRS
Constellation Cepheus
Right ascension 20h 45m 53.954s
Declination +67° 57′ 38.68″
Apparent magnitude (V) 14.58 - 18.08
Characteristics
Spectral type A5Ve
Apparent magnitude (G) 13.87±0.02
Variable type T Tau
Astrometry
Proper motion (μ) RA: 8.108±0.057 mas/yr
Dec.: −2.108±0.054 mas/yr
Parallax (π)2.8048±0.0392 mas
Distance1,160 ± 20 ly
(357 ± 5 pc)
Details
Mass2.6 M☉
Radius2.9 R☉
Luminosity1 - 100 L☉
Temperature8,150 K
Age<1 Myr
Database references
SIMBADdata

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. In visible light it varies in brightness from magnitude 17 to 19, making it far too faint to be seen by the naked eye.

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. It was given its variable star designation in 1978. The star is embedded within Gyulbudaghian's Nebula, a reflection nebula. As the star's brightness changes, the nebula's shape changes dramatically.

References

  1. ↑ "A changing fan". ESA/Hubble Picture of the Week. Retrieved 23 April 2013.
  2. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  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 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.
  7. 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.
  8. ↑ 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.
  9. 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.
  10. 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.
  11. ↑ Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (April 1978). "63rd Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 1414: 1. Bibcode:1978IBVS.1414....1K. Retrieved 13 October 2024.
  12. ↑ Harrington, Phil. "Gyulbudaghian's Nebula". Astronomy. Firecrown Media. Retrieved 13 October 2024.