2016A&A...587A..35K


Query : 2016A&A...587A..35K

2016A&A...587A..35K - Astronomy and Astrophysics, volume 587A, 35-35 (2016/3-1)

Orbits in the T Tauri triple system observed with SPHERE.

KOEHLER R., KASPER M., HERBST T.M., RATZKA T. and BERTRANG G.H.-M.

Abstract (from CDS):

We present new astrometric measurements of the components in the T Tauri system and derive new orbits and masses. T Tauri was observed during the science verification time of the new extreme adaptive optics facility SPHERE at the VLT. We combine the new positions with recalibrated NACO-measurements and data from the literature. Model fits for the orbits of T Tau Sa and Sb around each other and around T Tau N yield orbital elements and individual masses of the stars Sa and Sb. Our new orbit for T Tau Sa/Sb is in good agreement with other recent results, which indicates that enough of the orbit has been observed for a reliable fit. The total mass of T Tau S is 2.65±0.11M. The mass ratio MSb:MSa is 0.25±0.03, which yields individual masses of MSa=2.12±0.10M and MSb=0.53±0.06M. If our current knowledge of the orbital motions is used to compute the position of the southern radio source in the T Tauri system, then we find no evidence of the proposed dramatic change in its path.

Abstract Copyright:

Journal keyword(s): stars: pre-main sequence - stars: individual: T Tauri - stars: fundamental parameters - binaries: close - astrometry - celestial mechanics

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3889 0
2 V* T Tau TT* 04 21 59.4319873992 +19 32 06.432393336   11.22 10.12 9.80   K0IV/Ve 1402 1
3 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1353 0
4 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2311 0
5 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1612 1

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