An Alpha2 Canum Venaticorum variable (or α2 CVn variable) is a type of variable star. These stars are chemically peculiar main sequence stars of spectral class B8p to A7p. They have strong magnetic fields and strong silicon, strontium, or chromium spectral lines. Their brightness typically varies by 0.01 to 0.1 magnitudes over the course of 0.5 to 160 days.[1]
A light curve for α2 Canum Venaticorum, plotted from TESS data[2]
In addition to their intensities, the intensities and profiles of the spectral lines of α2 CVn variables also vary, as do their magnetic fields. The periods of these variations are all equal and are believed to equal the period of rotation of the star. It is thought that they are caused by an inhomogeneous distribution of metals in the atmospheres of these stars, so that the surface of the star varies in brightness from point to point.[3]
The type-star which this class is named after is α2 Canum Venaticorum, a star in the binary system of Cor Caroli, which is in the northern constellation of Canes Venatici. Its brightness fluctuates by 0.14 magnitudes with a period of 5.47 days.[4]
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and 26 Related for: Alpha2 Canum Venaticorum variable information
An Alpha2CanumVenaticorumvariable (or α2 CVn variable) is a type of variable star. These stars are chemically peculiar main sequence stars of spectral...
Caroli /ˌkɔːr ˈkærəlaɪ/ is a binary star designated Alpha CanumVenaticorum or α CanumVenaticorum. The International Astronomical Union uses the name "Cor...
with a period of 21.12 ± 0.48 hours. 21 CanumVenaticorum is classified as an Alpha2CanumVenaticorum type variable star and its brightness varies by 0.04...
small-amplitude variable, an Alpha2CanumVenaticorumvariable with a period of just over one day. Another evolved star is the naked-eye variable XY Lyrae,...
its atmosphere; it belongs to a class of star known as an Alpha2CanumVenaticorumvariable. Shining with an apparent magnitude of 5.89, Epsilon Fornacis...
brightness. The star HR 6958, also known as MV Serpentis, is an Alpha2CanumVenaticorumvariable that is faintly visible to the naked eye. The star's metal...
believed to have a "star-planet interaction." Portal: Star Alpha2CanumVenaticorumvariable Dynamo theory Earth's magnetic field Fossil stellar magnetic...
precursor of penicillin ACV, an astronomical notation for an Alpha2CanumVenaticorumvariable This disambiguation page lists articles associated with the...
main sequence star. It is an α2 CanumVenaticorumvariable or a rapidly oscillating Ap star, thus it bears the variable star designation GZ Librae and...
spectral types B0p to B9p— high-temperature analogues of Alpha2CanumVenaticorumvariables—and exhibit strong magnetic fields and intense He I and Si III...
twenty Cepheid variables, which were observed by the Hubble Space Telescope. Coma Berenices also contains Alpha2CanumVenaticorumvariables, such as 13...
stands for peculiar, as its spectrum is characteristic of an α2 CanumVenaticorumvariable. Epsilon Ursae Majoris, as a representative of this type, may...
chromium, and other iron peak elements. It is classified as an Alpha2CanumVenaticorumvariable, ranging in magnitude from 4.91 down to 4.99 with a period...
peculiarities of silicon and iron in the spectrum. It is an Alpha2CanumVenaticorumvariable that ranges in visual magnitude from 5.70 down to 5.74 with...
Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars Archived 2017-06-20 at the Wayback Machine, Sternberg Astronomical...
than 5000 years. The brighter component, γ2 Arietis, is an α2 CVn type variable star, a type of star with a strong magnetic field and enhanced spectral...
abnormal abundance of silicon. The primary is classified an Alpha2CanumVenaticorum type variable star and has a surface magnetic field of about 1 kG. Its...
2012-02-27. Retrieved 2010-07-16. "AAVSO Website". American Association of Variable Star Observers. Retrieved 9 March 2014. "Naming Stars". Retrieved 13 December...
rotational velocity of 199 km/s. The object was observed to be an Alpha2CanumVenaticorumvariable that fluctuates between 6.46 and 6.47 within 1.03 days, which...
star appears helium-weak in the ultraviolet. 4 Cygni A is an Alpha2CanumVenaticorumvariable that varies by 0.02 magnitude over a period of 0.68674 days...
abundances of silicon, strontium, and chromium. It is an Alpha2CanumVenaticorumvariable with a weak active magnetic field that causes it to fluctuate...
along a position angle of 28.5°. The brighter component is an α2 CanumVenaticorumvariable that changes in brightness with a period of 2.344 days and an...
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