Gamma Doradus

From Wikipedia, the free encyclopedia
(Redirected from Gamma Dor)
Jump to navigation Jump to search

Template:Short description

Gamma Doradus
File:GammaDorLightCurve.png
A light curve for Gamma Doradus, plotted from TESS data[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Dorado
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 4.25[3]
Characteristics
Evolutionary stage Main sequence
Spectral type F1V[4]
U−B Template:Engvar +0.03[5]
B−V Template:Engvar +0.30[5]
R−I Template:Engvar +0.16[5]
Variable type γ Dor[3]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[6] km/s
Proper motion (μ) RA: +99.463[2] mas/yr
Dec.: +183.353[2] mas/yr
Parallax (π)48.8984±0.2817 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)2.72[3]
Details
MassScript error: No such module "val".[7] Template:Solar mass
RadiusScript error: No such module "val".[2] Template:Solar radius
LuminosityScript error: No such module "val".[2] Template:Solar luminosity
Luminosity (bolometric)7.0[3] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[8] cgs
TemperatureScript error: No such module "val".[2] K
Metallicity [Fe/H]Script error: No such module "val".[8] dex
Rotational velocity (v sin i)Script error: No such module "val".[9] km/s
Age0.535–1.207[7] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

Script error: No such module "Check for unknown parameters".

Gamma Doradus, Latinized from γ Doradus, is the third-brightest star in the southern constellation of Dorado.[11] It is faintly visible to the naked eye with an apparent visual magnitude of approximately 4.25, and is a variable star, the prototype of the class of Gamma Doradus variables.[3] The star is located at a distance of 67 light years from the Sun based on parallax,[2] and is drifting further away with a radial velocity of +25 km/s.[6] Based on its motion through space, it appears to be a member of the IC 2391 supercluster.[12]

This is an F-type main-sequence star with a stellar classification of F1V.[4] It is a pulsating variable that varies in brightness by less than a tenth of a magnitude owing to nonradial gravity wave oscillations.[3] Four pulsation frequencies have been identified with periods of 17.6, 12.8, 16.3, and 18.2 hours.[9][13] The star is around 0.5–1.2 billion years old and is spinning with a projected rotational velocity of 57 km/s.[9] It has 1.6[7] times the mass of the Sun and 1.9[2] times the Sun's radius. The star is radiating seven[2] times the luminosity of the Sun from its photosphere at an effective temperature of 6,906 K.[2]

An infrared excess has been detected at multiple frequencies,[14] indicating that the star is being orbited by a pair of debris disks.[15]

References

<templatestyles src="Reflist/styles.css" />

  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ a b c d e f g h i j k l Template:Cite Gaia DR2
  3. ↑ a b c d e f Script error: No such module "Citation/CS1".
  4. ↑ a b Script error: No such module "Citation/CS1".
  5. ↑ a b c Script error: No such module "citation/CS1". Script error: No such module "citation/CS1".
  6. ↑ a b Script error: No such module "Citation/CS1".
  7. ↑ a b c Script error: No such module "Citation/CS1".
  8. ↑ a b Script error: No such module "Citation/CS1".
  9. ↑ a b c Script error: No such module "Citation/CS1".
  10. ↑ Template:Cite simbad
  11. ↑ Script error: No such module "citation/CS1".
  12. ↑ Script error: No such module "Citation/CS1".
  13. ↑ Script error: No such module "Citation/CS1".
  14. ↑ Script error: No such module "Citation/CS1".
  15. ↑ Script error: No such module "Citation/CS1".

Script error: No such module "Check for unknown parameters".

Template:Stars of Dorado

Retrieved from "http://debianws.lexgopc.com/wiki143/index.php?title=Gamma_Doradus&oldid=7589108"