X Caeli

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X Caeli
Observation data
Epoch J2000      Equinox J2000
Constellation Caelum[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 6.28Template:Snd6.39[3] (6.43 + 9.65)[4]
Characteristics
Spectral type F2 IV/V[5]
B−V Template:Engvar Script error: No such module "val".[1]
Variable type δ Sct[6]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[7] km/s
Proper motion (μ) RA: +28.361 mas/yr[2]
Dec.: +40.338 mas/yr[2]
Parallax (π)9.7026±0.0221 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)1.36[1]
Details
X Cae A
Mass1.52[8] Template:Solar mass
RadiusScript error: No such module "val".[9] Template:Solar radius
Luminosity23.65[1] Template:Solar luminosity
Surface gravity (log g)3.80[8] cgs
TemperatureScript error: No such module "val".[8] K
Rotational velocity (v sin i)Script error: No such module "val".[9] km/s
Age961[8] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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X Caeli is a binary star[11] system in the southern constellation of Caelum. It has the Bayer designation Gamma2 Caeli, which is Latinized from γ2 Caeli and abbreviated Gamma2 Cae or γ2 Cae; X Caeli is the system's variable star designation. This system is barely visible to the naked eye with a combined apparent visual magnitude of 6.32.[1] Based upon an annual parallax shift of Script error: No such module "val".,[2] it is located at a distance of Script error: No such module "convert". from Earth. The system is moving further away from the Sun with a radial velocity of +6 km/s.[7]

Properties

File:XCaeLightCurve.png
A visual-band light curve for X Caeli, adapted from Mantegazza and Poretti (1996)[12]

The yellow-white-hued primary, component A, has an apparent magnitude of +6.32 and stellar classification of F2 IV/V,[5] showing mixed traits of an F-type main-sequence star and a subgiant. The spectral lines display a narrow absorption core that suggests the presence of a circumstellar shell.[12]

This star is classified as a Delta Scuti variable with a brightness varies from magnitude Script error: No such module "val". over a period of 3.25 hours. A 2000 observing campaign identified at least six independent pulsation modes for this variation.[9][13] It has 1.5[8] times the mass of the Sun and 3.4 times the Sun's radius.[9] This star is radiating 24[1] times the luminosity of the Sun from its photosphere at an effective temperature of 7,227 K.[8] It is nearly a billion years old,[8] with a relatively high rate of rotation, showing a projected rotational velocity of 69 km/s.[9]

The companion star, component B, has an apparent magnitude of +9.65 and, as of 2000, is at an angular separation of Script error: No such module "val". along a position angle of 183°.[4] The orbital period for this binary star system is unknown.[11]

References

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

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External links

Template:Stars of Caelum

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