HD_29697 Knowpia

HD 29697
	; A light curve for V834 Tauri, plotted from Kepler data
Observation data; Epoch J2000 Equinox J2000
Constellation	Taurus
Right ascension	04h 41m 18.85634s
Declination	+20° 54′ 05.4456″
Apparent magnitude (V)	7.94 - 8.33
Characteristics
Spectral type	K3 V
U−B color index	+0.94
B−V color index	+1.09
Variable type	BY Dra
Astrometry
Radial velocity (Rv)	+11 km/s
Proper motion (μ)	RA: −232.38±1.05 mas/yr ; Dec.: −254.28±0.69 mas/yr
Parallax (π)	75.82 ± 1.14 mas
Distance	43.0 ± 0.6 ly ; (13.2 ± 0.2 pc)
Absolute magnitude (MV)	+7.49
Details
Mass	0.75 M☉
Radius	0.67 R☉
Luminosity	0.15 L☉
Surface gravity (log g)	4.50 cgs
Temperature	4,454±11.4 K
Metallicity [Fe/H]	0.01 dex
Rotational velocity (v sin i)	9.73 km/s
Age	49±37 Myr
Other designations
	V834 Tau, BD+20° 802, GJ 174, Gliese 174, HD 29697, HIP 21818, SAO 76708.
Database references
SIMBAD	data
ARICNS	data

HD 29697 (Gliese 174, V834 Tauri) is a variable star of BY Draconis type in the constellation Taurus. It has an apparent magnitude around 8 and is approximately 43 ly away.

Description edit

HD 29697 is the Henry Draper Catalogue number of this star. It is also known by its designation in the Gliese Catalogue of Nearby Stars, Gliese 174, and its variable star designation V834 Tauri.

V834 Tauri is a BY Draconis variable with maximum and minimum apparent magnitudes of 7.94 and 8.33 respectively,^[3] so it is never 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.^[9]

References edit

^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
^ ^a ^b ^c ^d ^e 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, S2CID 18759600
^ ^a ^b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
^ Montes, D.; et al. (2001), "Late-type members of young stellar kinematic groups - I. Single stars" (PDF), 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, archived from the original (PDF) on 2017-09-22, retrieved 2018-11-04
^ ^a ^b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
^ ^a ^b ^c ^d 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, S2CID 119287319, A106
^ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. Determination of Radial Velocities and Their Applications. Vol. 30. University of Toronto: International Astronomical Union. p. 57. Bibcode:1967IAUS...30...57E.
^ 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.
^ ^a ^b ^c ^d ^e 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, S2CID 51417657
^ 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, S2CID 18478960
^ "HD 29697". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 February 2018.

[MAST-1] "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.

[hipparcos-2] 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, S2CID 18759600

[gcvs-3] Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.

[mnras328_1_45-4] Montes, D.; et al. (2001), "Late-type members of young stellar kinematic groups - I. Single stars" (PDF), 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, archived from the original (PDF) on 2017-09-22, retrieved 2018-11-04

[MERMILLIOD-5] Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M

[aa547_A106-6] 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, S2CID 119287319, A106

[rgcrv-7] Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. Determination of Radial Velocities and Their Applications. Vol. 30. University of Toronto: International Astronomical Union. p. 57. Bibcode:1967IAUS...30...57E.

[xhip-8] 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.

[apj698_2_1068-9] 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, S2CID 51417657

[aaa411_3_559-10] 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, S2CID 18478960

[11] "HD 29697". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 February 2018.

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Observation data Epoch J2000 Equinox J2000
A light curve for V834 Tauri, plotted from Kepler data^[1]
Constellation	Taurus
Right ascension	04^h 41^m 18.85634^s^[2]
Declination	+20° 54′ 05.4456″^[2]
Apparent magnitude (V)	7.94 - 8.33^[3]
Characteristics
Spectral type	K3 V^[4]
U−B color index	+0.94^[5]
B−V color index	+1.09^[5]
Variable type	BY Dra^[6]
Astrometry

Radial velocity (R_v)	+11^[7] km/s
Proper motion (μ)	RA: −232.38±1.05^[2] mas/yr Dec.: −254.28±0.69^[2] mas/yr
Parallax (π)	75.82 ± 1.14 mas^[2]
Distance	43.0 ± 0.6 ly (13.2 ± 0.2 pc)
Absolute magnitude (M_V)	+7.49^[8]

Details

Mass	0.75^[9] `M`_☉
Radius	0.67^[9] `R`_☉
Luminosity	0.15^[9] `L`_☉
Surface gravity (log g)	4.50^[6] cgs
Temperature	4,454±11.4^[10] K
Metallicity [Fe/H]	0.01^[6] dex
Rotational velocity (v sin i)	9.73^[6] km/s
Age	49±37^[9] Myr

Other designations
V834 Tau, BD+20° 802, GJ 174, Gliese 174, HD 29697, HIP 21818, SAO 76708.^[11]
Database references
SIMBAD	data
ARICNS	data

Summary

Description edit

References edit