IQ Aurigae

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Template:Short description

IQ Aurigae
File:IQAurLightCurve.png
A light curve for IQ Aurigae from BRITE nanosatellites. Plotted from data published by Strassmeier et al. (2020),[1] assuming a period of 2.463 days.
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.38[3]
Characteristics
Evolutionary stage main sequence[4]
Spectral type A0pSi[5]
U−B Template:Engvar −0.62[6]
B−V Template:Engvar Script error: No such module "val".[3]
Variable type α2 CVn[7]
Astrometry
Radial velocity (Rv)+28.6[8] km/s
Proper motion (μ) RA: +13.573[2] mas/yr
Dec.: −29.028[2] mas/yr
Parallax (π)7.0526±0.1065 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−0.42[9]
Details[9]
MassScript error: No such module "val". Template:Solar mass
RadiusScript error: No such module "val". Template:Solar radius
Luminosity263 Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val". cgs
Temperature14,454 K
Metallicity [Fe/H]1.70[10] dex
Rotation2.4660 days
Rotational velocity (v sin i)49 km/s
Age6.3[4] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[11]
Database references
SIMBADdata

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IQ Aurigae is a (most likely) single,[4] variable star in the northern constellation of Auriga. It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude that fluctuates around 5.38.[3] The star is located at a distance of about 460 light-years from the Sun based on parallax and is drifting further away with a radial velocity of +28.6 km/s.[8]

In 1953, Sanford S Provin reported that the star, referred to at that time as HD 34452, showed indications of being a variable star, but the evidence was inconclusive.[12] Karl D. Rakos confirmed that the star is variable in 1962.[13]

This is a magnetic Ap star with a stellar classification of A0pSi.[4] It is known as a silicon star, having a strong line of singly ionized silicon, and may also be helium deficient as the lines of helium are weaker than expected.[10] The star is an Alpha2 Canum Venaticorum-type variable, ranging in magnitude from 5.35 down to 5.43 with a rotationally-modulated period of 2.4660 days.[7] It is an X-ray source with a high luminosity of Script error: No such module "val"., which may be caused by a combination of shocks in the stellar wind and magnetic reconnection occurring well above the stellar surface. The star has been observed to flare, during which the X-ray emission rose to Script error: No such module "val"..[4]

IQ Aurigae is 6.3[4] million years old and is spinning with a projected rotational velocity of 49 km/s, giving it a rotation period of 2.47 days.[9] It has nearly four times the mass of the Sun and 2.6 times the Sun's radius. The star is radiating 263 times the luminosity of the Sun from its active photosphere at an effective temperature of 14,454 K.[9]

References

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ a b c d e Template:Cite Gaia DR3
  3. ↑ a b c Script error: No such module "citation/CS1".
  4. ↑ a b c d e f Script error: No such module "citation/CS1".
  5. ↑ Script error: No such module "citation/CS1".
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ a b Script error: No such module "citation/CS1".
  8. ↑ a b Script error: No such module "citation/CS1".
  9. ↑ a b c d Script error: No such module "citation/CS1".
  10. ↑ a b Script error: No such module "citation/CS1".
  11. ↑ Template:Cite simbad
  12. ↑ Script error: No such module "Citation/CS1".
  13. ↑ Script error: No such module "Citation/CS1".

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External links

Template:Stars of Auriga

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