Astronomy:CC Andromedae

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Short description: Star in the constellation Andromeda
CC Andromedae
CCAndLightCurve.png
The visual band light curve of CC Andromedae, adapted from Rousseau et al.[1]
Observation data
Equinox J2000.0]] (ICRS)
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[2] mas
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 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]

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

  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. https://ui.adsabs.harvard.edu/abs/1988IBVS.3211....1R. Retrieved 7 October 2021. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 3.3 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.
  4. ↑ Database entry, VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012), N. Zacharias et al., CDS ID I/322A Accessed on line 2018-10-29.
  5. ↑ 5.0 5.1 5.2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy & Astrophysics 355: L27–L30, Bibcode: 2000A&A...355L..27H. 
  6. ↑ 6.0 6.1 6.2 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E. et al. (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. http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=II/246. 
  7. ↑ 7.0 7.1 7.2 7.3 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. 
  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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  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. doi:10.1086/126629. Bibcode: 1953PASP...65..291L. https://articles.adsabs.harvard.edu/pdf/1953PASP...65..291L. Retrieved 31 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, doi:10.1093/mnras/stw2756, Bibcode: 2017MNRAS.465.1181L 



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