HD 29697
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 41m 18.85634s[1] |
| Declination | +20° 54′ 05.4456″[1] |
| Apparent magnitude (V) | 8.00[2] |
| Characteristics | |
| Spectral type | K3 V[3] |
| U−B color index | +0.94[2] |
| B−V color index | +1.09[2] |
| Variable type | BY Dra[4] |
| Astrometry | |
| Radial velocity (Rv) | +11[5] km/s |
| Proper motion (μ) | RA: −232.38±1.05[1] mas/yr Dec.: −254.28±0.69[1] mas/yr |
| Parallax (π) | 75.82 ± 1.14[1] mas |
| Distance | 43.0 ± 0.6 ly (13.2 ± 0.2 pc) |
| Details | |
| Mass | 0.75[6] M☉ |
| Radius | 0.67[6] R☉ |
| Luminosity | 0.15[6] L☉ |
| Surface gravity (log g) | 4.50[4] cgs |
| Temperature | 4,454±11.4[7] K |
| Metallicity [Fe/H] | 0.01[4] dex |
| Rotational velocity (v sin i) | 9.73[4] km/s |
| Age | 49±37[6] Myr |
| Other designations | |
HD 29697 or V834 Tauri is a variable star of the BY Draconis[4] type in the equatorial constellation of Taurus. It has an apparent magnitude of 8.0,[2] so it is not visible to the naked eye. The star has been examined for indications of a circumstellar disk using the Spitzer Space Telescope, but no statistically-significant infrared excess was detected.[6]
References
- 1 2 3 4 5 van Leeuwen, F. (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
- 1 2 3 4 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M
- ↑ Montes, D.; et al. (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
- 1 2 3 4 5 Mishenina, T. V.; et al. (November 2012), "Activity and the Li abundances in the FGK dwarfs", Astronomy & Astrophysics 547: 8, arXiv:1210.6843, Bibcode:2012A&A...547A.106M, doi:10.1051/0004-6361/201118412, A106
- ↑ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E
- 1 2 3 4 5 Plavchan, Peter; et al. (June 2009), "New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope", The Astrophysical Journal 698 (2): 1068–1094, arXiv:0904.0819, Bibcode:2009ApJ...698.1068P, doi:10.1088/0004-637X/698/2/1068
- ↑ Kovtyukh, V. V.; et al. (2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics 411 (3): 559–564, arXiv:astro-ph/0308429, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378
External links
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