GV Tauri

Summary

Coordinates: Sky map 04h 29m 23.7315s, +24° 33′ 00.2160″

GV Tauri
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
GV Tauri A
Right ascension 04h 29m 23.71056s[1]
Declination +24° 32′ 58.6176″[1]
Apparent magnitude (V)
GV Tauri B
Right ascension 04h 29m 23.6868s[2]
Declination +24° 33′ 01.1160″[2]
Apparent magnitude (V)
Characteristics
GV Tauri A
Evolutionary stage pre-main-sequence star
Spectral type K3[3]
Apparent magnitude (K) 10.872[1]
Apparent magnitude (g) 16.282[4]
Variable type T Tau
GV Tauri B
Spectral type late G to early K[3]
Apparent magnitude (K) 10.171[2]
Astrometry
GV Tauri A
Proper motion (μ) RA: 8.0±0.4[4] mas/yr
Dec.: −26.7±0.3[4] mas/yr
Parallax (π)7.01 ± 0.34[4] mas
Distance470 ± 20 ly
(143 ± 7 pc)
GV Tauri B
Position (relative to GV Tauri A)
ComponentGV Tauri B
Angular distance1.2 [5]
Observed separation
(projected)
170 AU
Details[3]
GV Tauri A
Mass1.8 M
Luminosity2.3 L
Surface gravity (log g)4.0 cgs
Temperature4800±200 K
Age0.5[5] Myr
GV Tauri B
Luminosity114 L
Age0.5[5] Myr
Other designations
2MASS J04292373+2433002, Haro 6-10, TIC 268217520, Elia 3-7, LEI 4, HBC 389
GV Tauri A: Gaia EDR3 149367383323435648, GV Tau S, EPIC 247820507, Haro 6-10 VLA 1, LEI 4A
GV Tauri B: GV Tau N, Haro 6-10 VLA 2, LEI 4B
Database references
SIMBADdata

GK Tauri is a young binary system composed of T Tauri-type pre-main sequence stars in the constellation of Taurus about 466 light years away, belonging to the Taurus Molecular Cloud.

System

The stars GV Tauri A (GV Tauri S) and G Tauri B (GV Tauri N) form a wide binary system, with the projected separation between components being 170 AU. Both are strongly shrouded by circumstellar dust - GV Tauri A by 30 magnitudes and the GV Tauri B up to 59 magnitudes in the V band.[3] Both components are suspected to be binaries themselves,[6] as they produce strongly ionized jets and molecular outflows.[7]

Properties

Both members of the binary system are medium-mass objects still contracting towards the main sequence and accreting mass, although accretion rates remain highly uncertain as of 2009.[3]

Protoplanetary system

Both stars are surrounded by protoplanetary disks, with the observable dust in each being about 5×10−5 M, and the gas about 0.005 M.[5] The disk of GV Tauri B is rich in carbon monoxide, hydrogen cyanide and, unusually, methane.[7]

The GV Tauri A planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
protoplanetary disk 0–17[5] AU 65±5[5]°
The GV Tauri B planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
protoplanetary disk 20[7] AU 30 or 80±10[5]°

References

  1. ^ a b c "V* GV Tau A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-08-03.
  2. ^ a b c "V* GV Tau B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-08-03.
  3. ^ a b c d e Prato, L.; Lockhart, K. E.; Johns-Krull, Christopher M.; Rayner, John T. (2009). "Stellar and Circumstellar Properties of Class I Protostars". The Astronomical Journal. 137 (4): 3931–3941. arXiv:0902.1289. Bibcode:2009AJ....137.3931P. doi:10.1088/0004-6256/137/4/3931. S2CID 12428060.
  4. ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
  5. ^ a b c d e f g Sheehan, Patrick D.; Eisner, Josh A. (2014). "CONSTRAINING THE DISK MASSES OF THE CLASS I BINARY PROTOSTAR GV Tau". The Astrophysical Journal. 791 (1): 19. arXiv:1405.7959. Bibcode:2014ApJ...791...19S. doi:10.1088/0004-637X/791/1/19. S2CID 118437418.
  6. ^ Wilking, Bruce A.; Marvel, Kevin B.; Claussen, Mark J.; Gerling, Bradley M.; Wootten, Alwyn; Gibb, Erika (2012). "A Proper Motion Study of the Haro 6-10 Outflow: Evidence for a Subarcsecond Binary". The Astrophysical Journal. 753 (2): 143. arXiv:1205.5760. Bibcode:2012ApJ...753..143W. doi:10.1088/0004-637X/753/2/143. S2CID 18213612.
  7. ^ a b c Fuente, A.; Treviño-Morales, S. P.; Le Gal, R.; Rivière-Marichalar, P.; Pilleri, P.; Rodríguez-Baras, M.; Navarro-Almaida, D. (2020). "Gas kinematics of key prebiotic molecules in GV Tau N revealed with an ALMA, PdBI, and Herschel synergy". Monthly Notices of the Royal Astronomical Society. 496 (4): 5330–5340. arXiv:2006.15065. doi:10.1093/mnras/staa1919.