V453 Cygni
Location of V453 Cygni | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 06m 34.97s[1] |
| Declination | +35° 44′ 26.3″[1] |
| Apparent magnitude (V) | 8.29 - 8.72[2] |
| Characteristics | |
| Variable type | Algol[2] |
| A | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B0.4IV[4] |
| Variable type | β Cep[5] |
| B | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B0.7IV[4] |
| Astrometry | |
| Radial velocity (Rv) | -15 km/s |
| Proper motion (μ) | RA: -3.129 mas/yr Dec.: -6.605 mas/yr |
| Parallax (π) | 0.5263±0.0333 mas |
| Distance | 6,200 ± 400 ly (1,900 ± 100 pc) |
| Details[3] | |
| A | |
| Mass | 14.36 ± 0.20 M☉ |
| Radius | 8.55 ± 0.06 R☉ |
| Temperature | 27 900 ± 400 K |
| B | |
| Mass | 11.11 ± 0.13 M☉ |
| Radius | 5.49 ± 0.06 R☉ |
| Temperature | 26 200 ± 500 K |
| Other designations | |
| MCW 794, V453 Cygni, BD+35 3964, HD 227696, SAO 69422, TIC 90349611, 2MASS J20063496+3544262[1] | |
| Database references | |
| SIMBAD | data |
V453 Cygni (also designated HD 227696 or BD+35° 3964) is a detached eclipsing binary star system located in the constellation of Cygnus. It consists of two massive early B-type subgiant stars in a short-period, slightly eccentric orbit. The system is a member of the young open cluster NGC 6871 and exhibits β Cephei type pulsations in its primary component, making it a key object for studying the evolution and internal structure of high-mass stars.[5][4][6] Another star system similar to V453 Cygni is HD 227586 (B0.5IVp).[7]
Observation
V453 Cygni was identified as a variable star in the early 20th century. Detailed photometric observations in the 1960s and 1970s revealed its eclipsing nature, with apsidal motion detected in 1973. High-resolution spectroscopy and light curve analyses in the 2000s provided precise absolute dimensions, confirming its membership in NGC 6871. In 2020, data from NASA's Transiting Exoplanet Survey Satellite (TESS) revealed β Cephei-type pulsations in the primary star, marking V453 Cygni as the first such pulsating star with a dynamically measured precise mass.[5][8]
References
- ^ a b c "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-12-17.
- ^ a b Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085.
- ^ a b c Pavlovski, K.; Southworth, J. (2008-12-19). "Chemical evolution of high-mass stars in close binaries - I. The eclipsing binary V453 Cygni". Monthly Notices of the Royal Astronomical Society. 394 (3): 1519–1528. arXiv:0812.3769. Bibcode:2009MNRAS.394.1519P. doi:10.1111/j.1365-2966.2009.14418.x.
- ^ a b c Southworth, J.; Maxted, P. F. L.; Smalley, B. (July 2004). "Eclipsing binaries in open clusters - II. V453 Cyg in NGC 6871". Monthly Notices of the Royal Astronomical Society. 351 (4): 1277–1289. arXiv:astro-ph/0403572. Bibcode:2004MNRAS.351.1277S. doi:10.1111/j.1365-2966.2004.07871.x.
- ^ a b c Southworth, J.; Bowman, D. M.; Tkachenko, A.; Pavlovski, K. (2020-05-15). "Discovery of β Cep pulsations in the eclipsing binary V453 Cygni". Monthly Notices of the Royal Astronomical Society: Letters. 497: L19–L23. arXiv:2005.07559. Bibcode:2020MNRAS.497L..19S. doi:10.1093/mnrasl/slaa091.
- ^ Wachmann, A. A. (1973). "Apsidal motion in the binary system V453 Cygni". Astronomy and Astrophysics. 25: 157. Bibcode:1973A&A....25..157W.
- ^ Cohen, H. L. (February 1982). "HD 227586 - A variable comparison star of V453 Cygni". Publications of the Astronomical Society of the Pacific. 94: 198. Bibcode:1982PASP...94..198C. doi:10.1086/130964.
- ^ Eze, Christian I.; Handler, Gerald (June 2024). "β Cephei Pulsators in Eclipsing Binaries Observed with TESS". The Astrophysical Journal Supplement Series. 272 (2): 25. arXiv:2403.12281. Bibcode:2024ApJS..272...25E. doi:10.3847/1538-4365/ad39c5.