Query : 2011A&A...530A.126K

2011A&A...530A.126K - Astronomy and Astrophysics, volume 530A, 126-126 (2011/6-1)

The orbit of GG Tauri A.


Abstract (from CDS):

We present a study of the orbit of the pre-main-sequence binary system GG Tau A and its relation to its circumbinary disk, in order to find an explanation for the sharp inner edge of the disk. Three new relative astrometric positions of the binary were obtained with NACO at the VLT. We combine them with data from the literature and fit orbit models to the dataset. We find that an orbit coplanar with the disk and compatible with the astrometric data is too small to explain the inner gap of the disk. On the other hand, orbits large enough to cause the gap are tilted with respect to the disk. If the disk gap is indeed caused by the stellar companion, then the most likely explanation is a combination of underestimated astrometric errors and a misalignment between the planes of the disk and the orbit.

Abstract Copyright:

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

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 [RRN96] GG Tau B Y*? 04 32 30.2766917736 +17 31 30.449809020           M6 48 1
2 V* GG Tau Or* 04 32 30.3506925552 +17 31 40.494063144 14.84 14.78 13.40 11.54   M0e+M2.0e 714 1
3 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1575 1

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