 A light curve for V1119 Tauri, plotted from TESS data | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05 24 25.46328 |
| Declination | +17° 23′ 00.7264″ |
| Apparent magnitude (V) | 5.0 |
| Characteristics | |
| A | |
| Spectral type | F8 V |
| U−B color index | −0.05 |
| B−V color index | 0.544 |
| Variable type | BY Dra |
| B | |
| Spectral type | K5 V |
| Astrometry | |
| A | |
| Radial velocity (Rv) | +37.8 km/s |
| Proper motion (μ) | RA: +250.585 mas/yr Dec.: −7.156 mas/yr |
| Parallax (π) | 68.5908 ± 0.1040 mas |
| Distance | 47.55 ± 0.07 ly (14.58 ± 0.02 pc) |
| Absolute magnitude (MV) | 3.49 ± 0.06 |
| Details | |
| 111 Tau A | |
| Mass | 1.08 M☉ |
| Radius | 1.67 ± 0.06 R☉ |
| Luminosity | 1.845 L☉ |
| Surface gravity (log g) | 4.24 cgs |
| Temperature | 6,015 K |
| Metallicity | −0.14 dex |
| Rotation | 3.503±0.006 d |
| Rotational velocity (v sin i) | 16.0 km/s |
| Age | 20–50 Myr |
| Other designations | |
| 111 Tau | |
| 111 Tau A: Gl 202, HR 1780, BD+17°920, HD 35296, SAO 94526, HIP 25278, V1119 Tau | |
| 111 Tau B: Gl 201, BD+17°917, HD 35171, SAO 94513, HIP 25220 | |
| Database references | |
| SIMBAD | A |
| B | |
111 Tauri is a wide binary star system in the constellation Taurus. It is located at a distance of 48 light years from the Sun. Primary component A is a main sequence star with a stellar classification of F8V. The secondary component B (Gliese 201) is a K-type main sequence star. The primary is larger and more luminous than the Sun, with about 130% of the Sun's radius and 185% of the Sun's luminosity. The apparent magnitude of 5.0 indicates it is a faint star that can be viewed by the naked eye under good, dark-sky conditions.
The metallicity of the primary star, which measures the proportion of elements other than hydrogen and helium, is similar to the Sun. Estimates of , which is the logarithm of the ratio of iron to hydrogen as compared to the Sun, range from a low of −0.14 to a high of 0.05. This star shows an unusually high content of lithium, which remains unexplained. Age estimates for this star range from 3.6 to 3.76 billion years. however the most recent age determination indicates a very young star with an age of 20 to 50 million years. It is a prominent X-ray source.
This star is rotating relatively rapidly, completing a rotation along the equator every 3.5 days as compared to 25 days for the Sun. It is also undergoing differential rotation in which the rotation velocity varies by latitude. 111 Tauri is a BY Draconis variable, and has been given the variable star designation V1119 Tauri.
This star was examined for an excess of infrared emission that could indicate it has a circumstellar debris disk of dust, but no significant excess was observed. The space velocity components of this star are = km/s. It is a member of the Hyades stellar kinematic group of co-moving stars.
References
- "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
- ^ 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.
- ^ Fuhrmann, Klaus (February 2008), "Nearby stars of the Galactic disc and halo - IV", Monthly Notices of the Royal Astronomical Society, 384 (1): 173–224, Bibcode:2008MNRAS.384..173F, doi:10.1111/j.1365-2966.2007.12671.x
- ^ 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.
- ^ "V* V1119 Tau -- Variable of BY Dra". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2011-07-03.
- van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
- ^ Holmberg, J.; Nordstrom, B.; Andersen, J. (July 2009). "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics". Astronomy and Astrophysics. 501 (3): 941–947. arXiv:0811.3982. Bibcode:2009A&A...501..941H. doi:10.1051/0004-6361/200811191. S2CID 118577511.
- Takeda, Yoichi (April 2007). "Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database". Publications of the Astronomical Society of Japan. 59 (2): 335–356. Bibcode:2007PASJ...59..335T. doi:10.1093/pasj/59.2.335.
- ^ Chen, Y. Q.; Nissen, P. E.; Zhao, G.; Zhang, H. W.; Benoni, T. (February 2000). "Chemical composition of 90 F and G disk dwarfs". Astronomy and Astrophysics Supplement. 141 (3): 491–506. arXiv:astro-ph/9912342. Bibcode:2000A&AS..141..491C. doi:10.1051/aas:2000124. S2CID 16273589.
- ^ Hempelmann, A.; et al. (2016). "Measuring rotation periods of solar-like stars using TIGRE. A study of periodic CaII H+K S-index variability". Astronomy and Astrophysics. 586. A14. Bibcode:2016A&A...586A..14H. doi:10.1051/0004-6361/201526972.
- Schröder, C.; Reiners, Ansgar; Schmitt, Jürgen H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo" (PDF), Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377
- ^ Waite, I. A.; et al. (2015). "Magnetic fields on young, moderately rotating Sun-like stars – I. HD 35296 and HD 29615". Monthly Notices of the Royal Astronomical Society. 449 (1): 8–24. arXiv:1502.05788. Bibcode:2015MNRAS.449....8W. doi:10.1093/mnras/stv006.
- ^ Makarov, V. V.; Zacharias, N.; Hennessy, G. S. (November 2008). "Common Proper Motion Companions to Nearby Stars: Ages and Evolution". The Astrophysical Journal. 687 (1): 566–578. arXiv:0808.3414. Bibcode:2008ApJ...687..566M. doi:10.1086/591638. S2CID 17811620.
- ^ Trilling, D. E.; et al. (February 2008). "Debris Disks around Sun-like Stars". The Astrophysical Journal. 674 (2): 1086–1105. arXiv:0710.5498. Bibcode:2008ApJ...674.1086T. doi:10.1086/525514. S2CID 54940779.
- Reiners, Ansgar (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, arXiv:astro-ph/0509399, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911, S2CID 8642707
- "V1119 Tau". The International Variable Star Index. AAVSO. Retrieved 27 June 2022.
- Montes, D.; et al. (November 2001). "Late-type members of young stellar kinematic groups - I. Single stars". Monthly Notices of the Royal Astronomical Society. 328 (1): 45–63. arXiv:astro-ph/0106537. Bibcode:2001MNRAS.328...45M. doi:10.1046/j.1365-8711.2001.04781.x. S2CID 55727428.
