HD 4113
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Sculptor
HD 4113 A
Right ascension 00h 43m 12.59559s[1]
Declination −37° 58′ 57.4777″[1]
Apparent magnitude (V) 7.880±0.013[2]
HD 4113 B
Right ascension 00h 43m 11.89423s[3]
Declination −37° 58′ 09.1687″[3]
Apparent magnitude (V) 12.70±0.02[2]
Characteristics
Spectral type G5V and M0–1V[2]
B−V color index 0.716±0.003[2]
Astrometry
HD 4113 A
Radial velocity (Rv)5.05±0.12[1] km/s
Proper motion (μ) RA: 49.412±0.016 mas/yr[1]
Dec.: −114.290±0.024 mas/yr[1]
Parallax (π)23.8256 ± 0.0240 mas[1]
Distance136.9 ± 0.1 ly
(41.97 ± 0.04 pc)
Absolute magnitude (MV)4.780±0.046[2]
HD 4113 B
Radial velocity (Rv)4.44±0.39[3] km/s
Proper motion (μ) RA: 53.733±0.022 mas/yr[3]
Dec.: −113.983±0.032 mas/yr[3]
Parallax (π)23.9023 ± 0.0327 mas[3]
Distance136.5 ± 0.2 ly
(41.84 ± 0.06 pc)
Absolute magnitude (MV)9.600±0.049[2]
Orbit[4]
CompanionHD 4113 C
Period (P)348.325+21.932
−15.139 yr
Semi-major axis (a)50.438+2.060
−1.420 AU
Eccentricity (e)0.648+0.008
−0.007
Inclination (i)83.456+2.342
−1.269°
Longitude of the node (Ω)225.686+0.704
−1.486°
Periastron epoch (T)2324305.035+127045.323
−7894.349
Argument of periastron (ω)
(secondary)		249.665+3.552
−4.805°
Semi-amplitude (K1)
(primary)		0.263535+0.002058
−0.003037 km/s
Details[5]
A
Mass1.02+0.02
−0.03 M☉
Radius1.08+0.02
−0.04[6] R☉
Luminosity1.085+0.04
−0.03[6] L☉
Surface gravity (log g)4.31±0.04 cgs
Temperature5,638±50 K
Metallicity [Fe/H]0.20±0.04 dex
Rotational velocity (v sin i)2.324[2] km/s
Age7.29+1.91
−1.46 or 5.0+1.3
−1.7[2] Gyr
B
Mass0.55[2] M☉
Surface gravity (log g)4.76[2] cgs
Temperature3,833[2] K
C
Mass51.913+0.604
−0.458[4] MJup
Other designations
CD−38°223, GC 858, HD 4113, HIP 3391, SAO 192693, GSC 03654-02131[7]
Database references
SIMBADdata
Exoplanet Archivedata

HD 4113 is a dual star system in the southern constellation of Sculptor. It is too faint to be viewed with the naked eye, having an apparent visual magnitude of 7.88.[2] The distance to this star, as estimated by parallax measurements, is 137 light years.[1] It is receding away from the Sun with a radial velocity of +5 km/s.[1]

The primary member of this system, component A, is a Sun-like G-type main-sequence star with a stellar classification of G5V.[2] Estimates of its age are five[2] to seven[5] billion years old, and it is spinning with a leisurely projected rotational velocity of 2.3 km/s.[2] The star is metal rich, with nearly the same mass,[5] radius, and luminosity[6] as the Sun.

Orbiting this star is a giant planet and a brown dwarf (HD 4113 C); the latter has been directly imaged. It also has a co-moving stellar companion, designated component B, which is a red dwarf with a class of M0–1V at an angular separation of 43″. This angle is equivalent to a projected separation of 2,000 AU.[2]

The most recent parameters for HD 4113 C as of 2022 come from a combination of data from radial velocity, astrometry, and imaging, showing that it is about 52 times the mass of Jupiter, and on an eccentric orbit with a semi-major axis of about 50.4 AU and an orbital period of about 348 years.[4]

Planetary system

On 26 October 2007, Tamuz et al. used the radial velocity method to find a planet with a minimum mass one and half times that of Jupiter orbiting at 1.28 AU away from HD 4113 A. The planet's orbit is highly eccentric.[8]

The HD 4113 A planetary system[4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity Inclination Radius
b ≥1.703+0.040
−0.059 MJ		 1.280±0.004 1.442+0.0002
−0.0001		 0.899+0.004
−0.003		 — —

See also

References

  1. 1 2 3 4 5 6 7 8 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Cheetham, A.; et al. (June 2018). "Direct imaging of an ultracool substellar companion to the exoplanet host star HD 4113 A". Astronomy & Astrophysics. 614: 19. arXiv:1712.05217. Bibcode:2018A&A...614A..16C. doi:10.1051/0004-6361/201630136. S2CID 119084543. A16.
  3. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  4. 1 2 3 4 Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.
  5. 1 2 3 Aguilera-Gómez, Claudia; et al. (June 2018). "Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert". Astronomy & Astrophysics. 614: 15. arXiv:1803.05922. Bibcode:2018A&A...614A..55A. doi:10.1051/0004-6361/201732209. S2CID 62799777. A55.
  6. 1 2 3 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  7. ↑ "HD 4113". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-04.
  8. ↑ Tamuz, O.; et al. (2008). "The CORALIE survey for southern extra-solar planets XV. Discovery of two eccentric planets orbiting HD 4113 and HD 156846". Astronomy and Astrophysics. 480 (3): L33–L36. arXiv:0710.5028. Bibcode:2008A&A...480L..33T. doi:10.1051/0004-6361:20078737. S2CID 11350536.
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