CR Boötis
 A visual band light curve for CR Boötis, plotted from 2019 AAVSO data.[1] The data have been folded with the supercycle period found by Kato et al.[2] | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes
|
| Right ascension | 13h 48m 55.222s[3] |
| Declination | +07° 57′ 35.72″[3] |
| Apparent magnitude (V) | 13.0 to 17.5[4] |
| Characteristics | |
| Evolutionary stage | Double white dwarf[5] |
| Variable type | Dwarf nova(?)[4]
|
| Details | |
| Primary | |
| Mass | 0.80[6] M☉ |
| Radius | 0.012[6] R☉ |
| Donor star | |
| Mass | 0.07[6] M☉ |
| Radius | 0.0526[6] R☉ |
AAVSO 1344+08[7] | |
| Database references | |
| SIMBAD | data |
CR Boötis is an interacting
The variable luminosity of this object was discovered in 1983 by
lines of helium.[9]
Rapid flickering suggests this is a close binary system undergoing
donor star is a helium white dwarf with a lower mass than the primary.[9] The pair have a brief orbital period of 24.522 minutes with a mass ratio of 0.101±0.004.[8] The orbital plane is inclined at an angle of about 30° to the line of sight from the Earth.[5]
This system displays two different states. The first is a lower state of quiescence that displays regular
superoutbursts similar to ER Ursae Majoris on a roughly 46 day cycle. The second state is brighter with frequent outbursts.[8] The system becomes bluer during superoutbursts, with a higher temperature.[5]
References
- ^ "Download Data". aavso.org. AAVSO. Retrieved 26 March 2023.
- ^ S2CID 121203405.
- ^ .
- ^ S2CID 125853869.
- ^ S2CID 253631390, 110.
- ^ .
- ^ "CR Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-03-06.
- ^ , 64.
- ^ doi:10.1086/165014.
- doi:10.1086/191115.
Further reading
- Kato, Taichi; et al. (February 2023), "Genuine standstill in the AM CVn star CR Boo", arXiv:2302.04454 [astro-ph.SR]
- Isogai, K.; et al. (2015), "Research on AM CVn stars: ASASSN-14ei and CR Boo", Proceedings of The Golden Age of Cataclysmic Variables and Related Objects - III (Golden2015). 7-12 September 2015. Palermo, Italy, p. 049, , 49.
- Honeycutt, R. Kent; et al. (February 2013), "Light Curve of CR Bootis 1990-2012 from the Indiana Long-Term Monitoring Program", Publications of the Astronomical Society of the Pacific, 125 (924): 126, S2CID 125036114.
- Kato, Taichi; et al. (June 2001), "The Second Supercycle of the Helium ER UMa Star, CR Boo", Information Bulletin on Variable Stars, 5120: 1, Bibcode:2001IBVS.5120....1K.
- Patterson, Joseph.; et al. (October 1997), "Superhumps in Cataclysmic Binaries. XII. CR Bootis, a Helium Dwarf Nova", Publications of the Astronomical Society of the Pacific, 109: 1100–1113, S2CID 122373469.
- Provencal, J. L.; et al. (May 1997), "Whole Earth Telescope Observations of the Helium Interacting Binary PG 1346+082 (CR Bootis)", The Astrophysical Journal, 480 (1): 383–394, S2CID 20591761.
- Wood, M. A.; et al. (1987), Cox, A. N.; Sparks, W. M.; Starrfield, S. G. (eds.), "PG 1346+082: An interacting binary white dwarf system", Stellar Pulsation: Proceedings of a Conference Held as a Memorial to John P. Cox at the Los Alamos National Laboratory Los Alamos, New Mexico, USA, August 11-15,1986, Lecture Notes in Physics, vol. 274, pp. 348–351, ISBN 978-3-540-17668-8.
- Wood, M. A.; et al. (September 1985), "The Exotic Helium Variable PG 1346+082", Bulletin of the American Astronomical Society, 17: 886, Bibcode:1985BAAS...17..886W.
- Nather, R. E.; et al. (December 1984), Marsden, B. G. (ed.), "PG 1346+082", IAU Circular, 4021 (2): 2, Bibcode:1984IAUC.4021....2N.
