14 Andromedae

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Template:Short description

14 Andromedae
Template:Location mark
Location of 14 Andromedae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 5.22[2]
Characteristics
Evolutionary stage Horizontal branch[3]
Spectral type K0 III[4]
B−V Template:Engvar Template:Val[2]
Variable type None[5]
Astrometry
Radial velocity (Rv)Template:Val[1] km/s
Proper motion (μ) RA: +286.898 mas/yr[1]
Dec.: Template:Val mas/yr[1]
Parallax (π)13.1681±0.0727 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)0.73[2]
Details
MassTemplate:Val,[6] Template:Val[7] Template:Solar mass
RadiusTemplate:Val[6] Template:Solar radius
LuminosityTemplate:Val[6] Template:Solar luminosity
Surface gravity (log g)Template:Val[8] cgs
TemperatureTemplate:Val[6] K
Metallicity [Fe/H]Template:Val[8] dex
Rotational velocity (v sin i)Template:Val[8] km/s
AgeTemplate:Val,[7] Template:Val[6] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata
Exoplanet Archivedata

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14 Andromedae, abbreviated 14 And, also named Veritate Template:IPAc-en,[10] is a single,[11] orange-hued giant star situated 248 light-years away[1] in the northern constellation of Andromeda. It is dimly visible to the naked eye with an apparent visual magnitude of 5.22.[2] The star is moving closer to the Earth with a heliocentric radial velocity of −60 km/s.[2] In 2008 an extrasolar planet (designated 14 Andromedae b, later named Spe) was discovered to be orbiting the star.[4]

This is a red clump[3] giant with a stellar classification of K0 III,[4] a star that has past the first-giant branch and is now on the horizontal branch, generating energy through helium fusion at its core. The star has expanded to 12.7 times the Sun's radius and is radiating 58 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,483 K.[6] Its exact mass and age are still uncertain.[6]

Nomenclature

14 Andromedae is the star's Flamsteed designation. Following its discovery the planet was designated 14 Andromedae b.

In July 2014 the International Astronomical Union launched NameExoWorlds, a process for giving proper names to certain exoplanets and their host stars.[12] The process involved public nomination and voting for the new names.[13] In December 2015, the IAU announced the winning names were Veritate for this star and Spe for its planet.[14]

The winning names were based on those submitted by the Thunder Bay Centre of the Royal Astronomical Society of Canada[15]); namely 'Veritas' and 'Spes', Latin for 'truth' and 'hope', respectively. (Veritas was also the Roman goddess of truth and Spes was the Roman goddess of hope.) The IAU substituted the ablative forms 'Veritate' and 'Spe', which mean 'where there is truth' and 'where there is hope', respectively. This was because 'Veritas' is the name of an asteroid important for the study of the Solar System.[16]

In 2016, the IAU organized a Working Group on Star Names (WGSN)[17] to catalog and standardize proper names for stars. In its first bulletin of July 2016,[18] the WGSN explicitly recognized the names of exoplanets and their host stars approved by the Executive Committee Working Group Public Naming of Planets and Planetary Satellites, including the names of stars adopted during the 2015 NameExoWorlds campaign. This star is now so entered in the IAU Catalog of Star Names.[10]

Planetary system

In 2008, an exoplanet was announced to be orbiting the star, detected by the radial velocity method. The planet was found to have a minimum mass of 4.8 Jupiter masses and to be orbiting in a circular orbit that takes 186 days to complete. The planet is one of the few known planets to be orbiting an evolved intermediate-mass star and one of the closest-orbiting (such planets have only been discovered around clump giants).[4]

A 2023 study of planets around evolved stars, while presenting updated parameters for this planet, found that the radial velocity variations are correlated with stellar activity signals, casting doubt on the planet's existence.[19] Based on this, a 2024 study listed it as one of several doubtful planets around giant stars (along with other named planets around 41 Lyncis and 42 Draconis).[20]

Template:OrbitboxPlanet begin Template:OrbitboxPlanet hypothetical Template:Orbitbox end

See also

References

Template:Reflist

Further reading

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External links

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Template:Sky Template:Stars of Andromeda

  1. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named GaiaDR3
  2. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  3. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Alves2000
  4. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Sato2008
  5. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named gcvs
  6. ↑ a b c d e f g Cite error: Invalid <ref> tag; no text was provided for refs named Ligi2016
  7. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Bonfanti2015
  8. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named jofre2015
  9. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
  10. ↑ a b Script error: No such module "citation/CS1".
  11. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Eggleton2008
  12. ↑ NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars. IAU.org. 9 July 2014
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Final Results of NameExoWorlds Public Vote Released, International Astronomical Union, 15 December 2015.
  15. ↑ Thunder Bay Amateur Astronomers Name a Planet
  16. ↑ Script error: No such module "citation/CS1".
  17. ↑ Script error: No such module "citation/CS1".
  18. ↑ Script error: No such module "citation/CS1".
  19. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Teng2023
  20. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Spaeth2024
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