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CC Andromedae

From Wikipedia, the free encyclopedia
Star in the constellation Andromeda
CC Andromedae

Thevisual bandlight curve of CC Andromedae, adapted from Rousseauet al.[1]
Observation data
Epoch J2000      Equinox J2000
ConstellationAndromeda
Right ascension00h 43m 48.01231s[2]
Declination+42° 16′ 55.76902″[2]
Apparent magnitude (V)9.19 – 9.46 variable[3]
Characteristics
Spectral typeF3IV-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−Bcolor index0.11[7]
B−Vcolor index0.3162[5]
Variable typeδ 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]
Distance1,238 ± 8 ly
(380 ± 3 pc)
Absolute bolometric
magnitude
 (Mbol)
1.25[7]
Details[7]
Mass1.98 M
Radius3.04 R
Surface gravity (log g)3.77±0.1 cgs
Temperature7,400 K
Rotational velocity (v sin i)20 km/s
Other designations
2MASS J00434801+4216557,BD+41 119,HIP 3432,SAO 36605,TYC 2805-1116-1, Gaia EDR3 387336407206270080
Database references
SIMBADdata

CC Andromedae (CC And) is avariable star in theconstellationAndromeda. It is a pulsating star of theDelta Scuti type, with anapparent visual magnitude that varies between 9.19 and 9.46 with a periodicity of 3 hours.[3]

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 theAndromeda Galaxy which is about one degree away from CC Andromedae.[9]

Thestellar classification of CC Andromedae is F3IV-V, as it shows intermediate characteristics between asubgiant and amain sequence star. The brightness variations are the result of 7 different pulsation modes, most of which are non-radial,[7] making it a suspectedGamma Doradus variable too.[10]

References

[edit]
  1. ^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. Retrieved7 October 2021.
  2. ^abcdefBrown, 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 atVizieR.
  3. ^abcdCC And, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al.,CDS IDII/250 Accessed on line 2018-10-29.
  4. ^Database entry, VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012), N. Zacharias et al.,CDS IDI/322A Accessed on line 2018-10-29.
  5. ^abcHøg, 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.
  6. ^abcCutri, 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.
  7. ^abcdFu, 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.
  8. ^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.
  9. ^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. Retrieved31 March 2023.
  10. ^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
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