CC Andromedae (CC And) is a variable star in the constellation Andromeda. It is a pulsating star of the Delta Scuti type, with an apparent visual magnitude that varies between 9.19 and 9.46 with a periodicity of 3 hours.[3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 43m 48.01231s[2] |
| Declination | +42° 16′ 55.76902″[2] |
| Apparent magnitude (V) | 9.19 – 9.46 variable [3] |
| Characteristics | |
| Spectral type | F3IV-V[3] |
| Apparent magnitude (R) | 9.40[4] |
| Apparent magnitude (B) | 9.693[5] |
| Apparent magnitude (V) | 9.347[5] |
| Apparent magnitude (G) | 9.3034[2] |
| Apparent magnitude (J) | 8.586[6] |
| Apparent magnitude (H) | 8.526[6] |
| Apparent magnitude (K) | 8.49[6] |
| U−B color index | 0.11[7] |
| B−V color index | 0.3162[5] |
| Variable type | δ Sct[3] |
| Astrometry | |
| Radial velocity (Rv) | −9.5±1.2[8] km/s |
| Proper motion (μ) | RA: -8.198[2] mas/yr Dec.: -3.920[2] mas/yr |
| Parallax (π) | 2.6339 ± 0.0175 mas[2] |
| Distance | 1,238 ± 8 ly (380 ± 3 pc) |
| Absolute bolometric magnitude (Mbol) | 1.25[7] |
| Details[7] | |
| Mass | 1.98 M☉ |
| Radius | 3.04 R☉ |
| Surface gravity (log g) | 3.77±0.1 cgs |
| Temperature | 7,400 K |
| Rotational velocity (v sin i) | 20 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
The variability of CC Andromedae was discovered accidentally, by Olin Eggen on October 22, 1952, when he attempted to use it as a comparison star for measuring the brightness and colors of stars in the Andromeda Galaxy which is about one degree away from CC Andromedae.[9]
The stellar classification of CC Andromedae is F3IV-V, as it shows intermediate characteristics between a subgiant and a main sequence star. The brightness variations are the result of 7 different pulsation modes, most of which are non-radial,[7] making it a suspected Gamma Doradus variable too.[10]
References
edit- ^ Rousseau, C.; Bourassa, J. I.; Milone, E. F. (July 1988). "VBI Light Curves of CC And". Information Bulletin on Variable Stars. 3211 (1): 1. Bibcode:1988IBVS.3211....1R. Retrieved 7 October 2021.
- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d CC And, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250 Accessed on line 2018-10-29.
- ^ Database entry, VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012), N. Zacharias et al., CDS ID I/322A Accessed on line 2018-10-29.
- ^ a b c 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 & Astrophysics, 355: L27–L30, Bibcode:2000A&A...355L..27H.
- ^ a b c Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
- ^ a b c d Fu, J. -N.; Jiang, S. Y. (1995). "The multiple frequencies of the δ Scuti variable CC Andromedae". Astronomy and Astrophysics Supplement. 110: 303. Bibcode:1995A&AS..110..303F.
- ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ Lindblad, Per Olof; Eggen, Olin J. (December 1953). "A New Short-Period Variable Star: BD+41°119". Publications of the Astronomical Society of the Pacific. 65 (387): 291. Bibcode:1953PASP...65..291L. doi:10.1086/126629. S2CID 122936379. Retrieved 31 March 2023.
- ^ Liakos, Alexios; Niarchos, Panagiotis (2016), "Catalogue and properties of δ Scuti stars in binaries", Monthly Notices of the Royal Astronomical Society, 465 (1): 1181–1200, arXiv:1611.00200, Bibcode:2017MNRAS.465.1181L, doi:10.1093/mnras/stw2756