14 Herculis

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Template:Short description

14 Herculis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hercules
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +6.61[2]
Characteristics
Spectral type K0 V[3]
B−V Template:Engvar Template:Val[2]
Astrometry
Radial velocity (Rv)Template:Val[2] km/s
Proper motion (μ) RA: Template:Val mas/yr[1]
Dec.: Template:Val mas/yr[1]
Parallax (π)55.8657±0.0291 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+5.39[2]
Details[4]
MassTemplate:Val Template:Solar mass
RadiusTemplate:Val Template:Solar radius
LuminosityTemplate:Val[5] Template:Solar luminosity
Surface gravity (log g)4.46 cgs
TemperatureTemplate:Val K
Metallicity [Fe/H]Template:Val dex
Rotation29.5 d
Rotational velocity (v sin i)1.65 km/s
AgeTemplate:Val[6] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[7]
Database references
SIMBADdata
Exoplanet Archivedata

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14 Herculis or 14 Her is a K-type main-sequence star Template:Convert away in the constellation Hercules. It is also known as HD 145675. Because of its apparent magnitude, of 6.61 the star can be very faintly seen with the naked eye. As of 2021, 14 Herculis is known to host two exoplanets.[4]

Stellar properties

14 Herculis is an orange dwarf star of the spectral type K0V. The star has about 98 percent of the mass, 97 percent of the radius, and only 67 percent of the luminosity of the Sun. The star appears to be 2.7 times as enriched with elements heavier than hydrogen (based on its abundance of iron), in comparison to the Sun.[4] It may have been the most metal rich star known as of 2001.[8]

Planetary system

In 1998 a planet, 14 Herculis b was discovered orbiting 14 Herculis via radial velocity.[9][10] This was formally published in 2003.[11] The planet has an eccentric orbit with a period of 4.8 years.[12] In 2005, a possible second planet was proposed, designated 14 Herculis c.[13] The parameters of this planet were very uncertain, but an initial analysis suggested that it was in the 4:1 resonance with the inner planet, with an orbital period of almost 19 years at an orbital distance of 6.9 AU.[12] The existence of the planet 14 Herculis c was confirmed in 2021, along with a rough orbit determination.[14]

A 2021 study combining radial velocity and astrometry found that the planetary orbits are not coplanar, which may indicate a strong planet-planet scattering event in the past.[4] Albeit one study using astrometry has found inclinations consistent with aligned orbits,[15] newer research including James Webb Space Telescope observations confirm the orbits are misaligned.[16][17] The planets are strongly interacting with each other. Their inclinations and eccentricities oscillate due to these gravitational interactions.[17]

There are signs of a third candidate planet with a period of about 10 years, but this signal is most likely related to the star's magnetic activity cycle.[16]

The outer planet, 14 Herculis c, was directly imaged with the James Webb Space Telescope, re-determining its orbital elements and finding a temperature of Template:Convert, among the lowest known for a directly imaged planets. Its apparent brightness is fainter than expected, hinting at disequilibrium chemistry and/or water ice clouds.[17]

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

See also

Notes

Template:Notelist

References

Template:Reflist

External links

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Template:14 Herculis Template:Stars of Hercules Template:Sky

  1. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named GaiaDR3
  2. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  3. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named perkins1989
  4. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Gagliuffi2021
  5. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named von Braun2014
  6. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Bonfanti2015
  7. ↑ Template:Cite simbad
  8. ↑ S. Feltzing and G. Gonzalez, "The nature of super-metal-rich stars* Detailed abundance analysis of 8 super-metal-rich star candidates", 2001
  9. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named press release
  10. ↑ Script error: No such module "citation/CS1".
  11. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Butler2003
  12. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named wittenmyer
  13. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Gozdziewski2006
  14. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Rosenthal2021
  15. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Feng2022
  16. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Benedict2023
  17. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Bardalez-Gagliuffi2025
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