Astronomy:Tau6 Eridani
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 03h 46m 50.88819s[1] |
| Declination | −23° 14′ 59.0046″[1] |
| Apparent magnitude (V) | 4.22[2] |
| Characteristics | |
| Spectral type | F5IV-V[3] |
| U−B color index | −0.03[2] |
| B−V color index | +0.43[2] |
| Astrometry | |
| Radial velocity (Rv) | 8.0±0.8[4] km/s |
| Proper motion (μ) | RA: −158.84[1] mas/yr Dec.: −528.95[1] mas/yr |
| Parallax (π) | 56.73 ± 0.19[1] mas |
| Distance | 57.5 ± 0.2 ly (17.63 ± 0.06 pc) |
| Absolute magnitude (MV) | 2.98[5] |
| Details | |
| Mass | 1.35[4] M☉ |
| Radius | 1.80+0.08 −0.03[6] R☉ |
| Luminosity | 5.47±0.06[6] L☉ |
| Surface gravity (log g) | 4.21±0.13[4] cgs |
| Temperature | 6,584+47 −144[6] K |
| Metallicity [Fe/H] | −0.03±0.11[4] dex |
| Rotational velocity (v sin i) | 16.25[7] km/s |
| Age | 2.0[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Tau6 Eridani, Latinized from τ6 Eridani, is a single[9] star in the equatorial constellation of Eridanus, located near the constellation border with Fornax. It has a yellow-white hue with an apparent visual magnitude of 4.22,[2] which is bright enough to be seen with the naked eye. Based upon parallax measurements, the distance to this star is around 57.5 light years.[1] It is drifting further away with a radial velocity of +8 km/s.[4]
The spectrum of Tau6 Eridani matches a stellar classification of F5IV-V,[3] indicating it is an F-type star that shows traits of both a main sequence star and a subgiant. It has an estimated 135%[4] of the Sun's mass and about 1.8 time the radius of the Sun.[6] The star is radiating 5.5[6] times the luminosity of the Sun at an effective temperature of 6,508 K,[4] and it does not display any surface magnetic activity.[7] The star has been examined for infrared excess emission that could indicate the presence of circumstellar matter, but none has been detected.[10]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 2.3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data (SIMBAD), Bibcode: 1986EgUBV........0M.
- ↑ 3.0 3.1 Gray, R. O. et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal 132 (1): 161–170, doi:10.1086/504637, Bibcode: 2006AJ....132..161G.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Kordopatis, G. et al. (November 2013), "The Radial Velocity Experiment (RAVE): Fourth Data Release", The Astronomical Journal 146 (5): 36, doi:10.1088/0004-6256/146/5/134, 134, Bibcode: 2013AJ....146..134K.
- ↑ Reiners, Ansgar (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics 446 (1): 267–277, doi:10.1051/0004-6361:20053911, Bibcode: 2006A&A...446..267R
- ↑ 6.0 6.1 6.2 6.3 6.4 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.
- ↑ 7.0 7.1 Martínez-Arnáiz, R. et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter", Astronomy and Astrophysics 520: A79, doi:10.1051/0004-6361/200913725, Bibcode: 2010A&A...520A..79M, http://eprints.ucm.es/37826/1/davidmontes17libre.pdf, retrieved 2018-11-04.
- ↑ "* tau06 Eri". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+tau06+Eri.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Weinberger, Alycia J. et al. (February 2015), "Target Selection for the LBTI Exozodi Key Science Program", The Astrophysical Journal Supplement Series 216 (2): 8, doi:10.1088/0067-0049/216/2/24, 24, Bibcode: 2015ApJS..216...24W.
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