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  3. PV Cephei
PV Cephei
Coordinates: Sky map 20h 45m 53.954s, +67° 57′ 38.68″
From Wikipedia, the free encyclopedia
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 J2000
Constellation Cepheus[1]
Right ascension 20h 45m 53.954s[2]
Declination +67° 57′ 38.68″[2]
Apparent magnitude (V) 14.58 - 18.08[3]
Characteristics
Spectral type A5Ve[4]
Apparent magnitude (G) 13.87±0.02[2]
Variable type T Tau[5]
Astrometry
Proper motion (μ) RA: 8.108±0.057[2] mas/yr
Dec.: −2.108±0.054[2] mas/yr
Parallax (π)2.8048±0.0392 mas[2]
Distance1,160 ± 20 ly
(357 ± 5 pc)
Details
Mass2.6[6] M☉
Radius2.9[6] R☉
Luminosity1[7] - 100[3] L☉
Temperature8,150[7] K
Age<1[3] 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.[8] In visible light it varies in brightness from magnitude 17 to 19, making it far too faint to be seen by the naked eye.[9]

A red band light curve for PV Cephei, adapted from Lorenzetti et al. (2011)[9]

PV Cephei's variability was first detected by Martin Cohen, Leonard Vello Kuhi and Eugene A. Harlan, and was announced in 1977.[10] It was given its variable star designation in 1978.[11] The star is embedded within Gyulbudaghian's Nebula, a reflection nebula. As the star's brightness changes, the nebula's shape changes dramatically.[10][12]

References

[edit]
  1. ^ "A changing fan". ESA/Hubble Picture of the Week. Retrieved 23 April 2013.
  2. ^ a b c d e f 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. ^ a b c 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. ^ a b 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. ^ a b 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. ^ a b 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. ^ a b 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.
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