2005A&A...439..585B


C.D.S. - SIMBAD4 rel 1.7 - 2019.09.19CEST05:05:31

2005A&A...439..585B - Astronomy and Astrophysics, volume 439, 585-594 (2005/8-4)

Dynamics of the young multiple system GG Tauri. I. Orbital fits and inner edge of the circumbinary disk of GG Tau A.

BEUST H. and DUTREY A.

Abstract (from CDS):

The GG Tauri system is a prototype example of a young, pre-main sequence multiple stellar system. Both millimeter and optical observations reveal that the central binary (GG Tau A) harbors a ring-shape circumbinary disk. In this paper, we analyse a compilation of astrometric data of the GG Tau A binary over 12 years that allow us, in combination with information coming from the disk observations (millimeter data), to derive a fairly accurate fit of the orbit (a=32.4AU, e=0.34). We also perform a dynamical study of the circumbinary disk, and show that in order to be in agreement with the orbit deduced from the fit, the inner gap of the disk should be approximatively twice as small as observed. We show that if we allow the error bars on the astrometric data to be larger, another orbit may be found (a=62AU, e=0.35), compatible with the location of the inner disk gap, although only marginally compatible with the astrometric data. Possible solutions to solve this discrepancy are discussed.

Abstract Copyright:

Journal keyword(s): stars: circumstellar matter - stars: individual: GG Tau - methods: numerical - celestial mechanics - systems: protoplanetary disks planetary

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 - 2019
#notes
1 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1173 1
2 CoKu GG Tau c TT* 04 32 30.25 +17 31 30.9     17.10     M6+M7.5 67 1
3 [RRN96] GG Tau B * 04 32 30.25 +17 31 30.9     15.2     M6 44 1
4 [RRN96] GG Tau A * 04 32 30.31 +17 31 41.0     12.3     M0e 63 1
5 V* GG Tau TT* 04 32 30.3318954228 +17 31 40.834888327 14.84 14.78 13.40 11.54   M0e+M2.0e 610 1

    Equat.    Gal    SGal    Ecl

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2019.09.19-05:05:31

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