Issue |
A&A
Volume 394, Number 3, November II 2002
|
|
---|---|---|
Page(s) | L31 - L34 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:20021380 | |
Published online | 21 October 2002 |
Letter to the Editor
The kinematic relationship between disk and jet in the DG Tauri system
1
Osservatorio Astrofisico di Arcetri, INAF, Largo E. Fermi 5, 50125 Firenze, Italy
2
California Institute of Technology, MS 105-24, Pasadena, CA 91125, USA
3
Dublin Institute for Advanced Studies, 5 Merrion Square Dublin 2, Ireland
4
Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany
Corresponding author: L. Testi, lt@arcetri.astro.it
Received:
21
August
2002
Accepted:
20
September
2002
We present high angular resolution millimeter wavelength continuum
and 13CO(2–1) observations of the circumstellar disk
surrounding the T Tauri star DG Tauri. We show that
the velocity pattern in the inner regions of the disk is consistent
with Keplerian rotation about a central 0.67 star.
The disk rotation is also consistent
with the toroidal velocity pattern in the initial channel of the optical
jet, as inferred from HST spectra of the first de-projected 100 AU from the
source. Our observations support the tight relationship between disk
and jet
kinematics postulated by the popular magneto-centrifugal models for jet
formation and collimation.
Key words: circumstellar matter / jets and outflows / stars: formation / stars: individual: DG Tauri
© ESO, 2002
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