HIGH-RESOLUTION OBSERVATIONS OF MOLECULAR OUTFLOWS IN THE HH-1-2 REGION

Citation
Jc. Correia et al., HIGH-RESOLUTION OBSERVATIONS OF MOLECULAR OUTFLOWS IN THE HH-1-2 REGION, Astronomy and astrophysics, 322(3), 1997, pp. 25-28
Citations number
14
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046361
Volume
322
Issue
3
Year of publication
1997
Pages
25 - 28
Database
ISI
SICI code
0004-6361(1997)322:3<25:HOOMOI>2.0.ZU;2-R
Abstract
We report (CO)-C-12 J = 3-2 high resolution observations of compact mo lecular outflows around VLA 1 and VLA 3, two young stellar objects in the HH 1-2 region. We have confirmed the existence of a new outflow as sociated with VLA 1, the powering source of these well known Herbig-Ha ro objects. The VLA 1 outflow exhibits red- and blue-shifted peaks wit h a separation of only 30 ''. The two lobes are clearly distinct from each other, suggesting that the out flow axis is close to the plane of the sky. The outflow is aligned with the I-II-I 1-2 axis, but the lob es are inside the HH knots. Our calculations have shown that this outf low is one of the weakest, youngest and most compact ever seen. Its to tal mass is 1.1 x 10(-3) M. and the dynamical timescale is similar or equal to 1 x 10(3) years. We have also mapped the more extended outflo w from VLA 3 confirming the existence of two young, distinct and very compact molecular outflo ws in this region.