Astronomy:HD 4113

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Short description: Binary star system in the constellation of Sculptor
HD 4113
Observation data
{{#ifeq:J2000.0|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| Epoch J2000.0      [[Astronomy:Equinox (celestial coordinates)|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[1] mas/yr
Dec.: −114.290±0.024[1] mas/yr
Parallax (π)23.8256 ± 0.0240[1] mas
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
Dec.: −113.983±0.032 mas/yr
Parallax (π)23.9023 ± 0.0327[3] mas
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 astronomical unit|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
Extrasolar Planets
Encyclopaedia		data

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 astronomical unit|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. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 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. doi:10.1051/0004-6361/201630136. A16. Bibcode: 2018A&A...614A..16C. 
  3. ↑ 3.0 3.1 3.2 3.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  4. ↑ 4.0 4.1 4.2 4.3 Feng, Fabo et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series 262 (21): 21. doi:10.3847/1538-4365/ac7e57. Bibcode: 2022ApJS..262...21F. 
  5. ↑ 5.0 5.1 5.2 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. doi:10.1051/0004-6361/201732209. A55. Bibcode: 2018A&A...614A..55A. 
  6. ↑ 6.0 6.1 6.2 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  7. ↑ "HD 4113". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+4113. 
  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. doi:10.1051/0004-6361:20078737. Bibcode: 2008A&A...480L..33T. http://www.aanda.org/articles/aa/full/2008/12/aa8737-07/aa8737-07.html. 

External links

Coordinates: Sky map 00h 43m 12.5967s, −37° 58′ 57.472″



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