Gamma2 Fornacis - Misplaced Pages

Star in the constellation Fornax For other stars with this Bayer designation, see γ Fornacis.

γ Fornacis
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Location of γ Fornacis (circled)
Constellation	Fornax
Right ascension	02 49 54.1822
Declination	−27° 56′ 31.123″
Apparent magnitude (V)	5.389
Characteristics
Evolutionary stage	Main sequence
Spectral type	A1 V
B−V color index	0.013±0.004
Astrometry

Radial velocity (R_v)	24.0±4.2 km/s
Proper motion (μ)	RA: −47.053 mas/yr Dec.: 20.932 mas/yr
Parallax (π)	6.3134 ± 0.1330 mas
Distance	520 ± 10 ly (158 ± 3 pc)
Absolute magnitude (M_V)	−0.35

Details

Mass	2.40+0.44 −0.38 `M`_☉
Radius	4.488 `R`_☉
Luminosity	117.073±0.111 `L`_☉
Surface gravity (log g)	3.50±0.25 cgs
Temperature	9,000±500 K
Metallicity	−0.02 dex
Rotational velocity (v sin i)	149 km/s
Age	401+138 −170 Myr

Other designations
γ For, CD−28°903, HD 17729, HIP 13202, HR 845, SAO 168082
Database references
SIMBAD	data

Gamma Fornacis, a name Latinized from γ Fornacis, is a single star in the southern constellation Fornax. It has a white hue and is faintly visible to the naked eye at night with an apparent visual magnitude of 5.4. The distance to Gamma Fornacis is approximately 520 light years based on parallax. It is drifting further away with a radial velocity of 24 km/s. Gamma Fornacis is a 6th magnitude star about four degrees to the north.

The stellar classification of Gamma Fornacis is A1 V, which is notation for an A-type main-sequence star that, like the Sun, is generating energy through core hydrogen fusion. Comparison of its properties to theoretical models suggest an age of about 400 million years old. It has a high rate of spin, showing a projected rotational velocity of 149 km/s. The star has 2.4 times the mass of the Sun and 4.5 times the Sun's radius. It is radiating 117 times the luminosity of the Sun from its photosphere at an effective temperature of roughly 9,000 K.

References

^ 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.
^ Gullikson, Kevin; et al. (2016). "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars". The Astronomical Journal. 152 (2): 40. arXiv:1604.06456. Bibcode:2016AJ....152...40G. doi:10.3847/0004-6256/152/2/40. S2CID 119179065.
^ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789.
^ Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Declinations -40_ƒ0 to -26_ƒ0. Vol. 3. Bibcode:1982mcts.book.....H.
^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
^ McDonald, I.; et al. (2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433.
Anders, F.; et al. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID 131780028.
"gam02 For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-17.
Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
Sinnott, Roger W.; Perryman, Michael A. C. (1997). Millennium Star Atlas. Vol. 1. Sky Publishing Corporation and the European Space Agency. p. 381. ISBN 0-933346-84-0.

Constellation of Fornax

Stars

Bayer	α (Dalim) β γ γ δ ε ζ η η η ι ι κ λ λ μ ν π ρ σ τ υ φ χ χ χ ψ ω
Variable	R TZ UZ
HR	683 858
HD	15337 20781 20782 20868 (Intan)
Other	2MASS J02431371−2453298 HIP 13044 LP 944-20 UDF 2457 WASP-72 (Diya)

Exoplanets	HD 16417 b HD 20781 b c d e HD 20782 b HD 20868 b (Baiduri) TOI-849 b

Star clusters	NGC 1049

Nebulae	NGC 1360

Galaxies

NGC	823 824 922 986 1097 1210 1255 1288 1310 1316 1317 1318 1326 1350 1365 1374 1375 1379 1380 1381 1387 1398 1399 1406 1425 1427
Other	Fornax Dwarf HUDF-JD2 GS-NDG-9422 IC 335 IC 1993 JADES-GS-z14-0 JADES-GS-z7-01-QU MRC 0316-257 PGC 13809 UDF 423 UDFj-39546284 UDFy-38135539

Galaxy clusters	Fornax Cluster

Astronomical events	SN 1992bd SN 1999eu SN 2003B