DY Persei
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 02h 35m 17.132s[1] |
| Declination | +56° 08′ 44.68″[1] |
| Apparent magnitude (V) | 11.09[1](v) |
| Characteristics | |
| Spectral type | C5,4pJ:[2] |
| B−V color index | 1.79[1] |
| V−R color index | 1.12[1] |
| J−H color index | 0.185[3] |
| J−K color index | 1.963[3] |
| Variable type | R CrB[4] |
| Astrometry | |
| Radial velocity (Rv) | -38[5] km/s |
| Distance | 1,500[6] pc |
| Absolute magnitude (MV) | ~ -2[6] |
| Details | |
| Surface gravity (log g) | 0.0[7] cgs |
| Temperature | 2,900-3,100[7] K |
| Metallicity | -2.0 - -0.5[7] |
| Other designations | |
| Database references | |
| SIMBAD | data |
DY Persei is a variable star in the Perseus constellation, being a prototype star to the very rare type of DY Persei variables, that pulsate like red variables, but also fade from sight like R Coronae Borealis variables.[8] DY Persei itself is an 11th magnitude carbon star that is too dim to see through binoculars. At its faintest it drops below 18th magnitude.[6]
References
- 1 2 3 4 5 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27. Bibcode:2000A&A...355L..27H.
- ↑ Dean, C. A. (1976). "Kinematic properties of the carbon stars". The Astronomical Journal 81: 364. Bibcode:1976AJ.....81..364D. doi:10.1086/111895.
- 1 2 Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog: II/246. Originally published in: 2003yCat.2246....0C 2246: 0. Bibcode:2003yCat.2246....0C.
- ↑ Mattei, Janet A.; Waagen, Elizabeth O.; Foster, E. Grant (1991). "R Coronae Borealis light curves 1843-1990". AAVSO Monograph. Bibcode:1991rcbl.book.....M.
- ↑ Demers, S.; Battinelli, P. (2007). "C stars as kinematic probes of the Milky Way disk from 9 to 15 kpc". Astronomy and Astrophysics 473: 143. Bibcode:2007A&A...473..143D. doi:10.1051/0004-6361:20077691.
- 1 2 3 Začs, L.; Mondal, S.; Chen, W. P.; Pugach, A. F.; Musaev, F. A.; Alksnis, O. (2007). "A comprehensive analysis of the cool RCB star DY Persei". Astronomy and Astrophysics 472: 247. Bibcode:2007A&A...472..247Z. doi:10.1051/0004-6361:20066923.
- 1 2 3 Yakovina, L. A.; Pugach, A. F.; Pavlenko, Ya. V. (2009). "DY Persei, the coolest metal-poor R CrB carbon star". Astronomy Reports 53 (3): 187. Bibcode:10.1134/S1063772909030019. doi:10.1134/S1063772909030019.
- ↑ Alcock, C.; Allsman, R. A.; Alves, D. R.; Axelrod, T. S.; Becker, A.; Bennett, D. P.; Clayton, G. C.; Cook, K. H.; Dalal, N. (2001). "The MACHO Project LMC Variable Star Inventory. X. The R Coronae Borealis Stars". The Astrophysical Journal 554 (1): 298–315. arXiv:astro-ph/0102262. Bibcode:2001ApJ...554..298A. doi:10.1086/321369.
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