EDP Sciences Journals List
Advanced Search
Subscriber Authentication Point
Home All issues Volume 383/ 2 Article

Free access article

Issue A&A
Volume 383, Number 2, February IV 2002
Page(s) 540 - 547
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20011772



A&A 383, 540-547 (2002)
DOI: 10.1051/0004-6361:20011772

The outflow activity of the protostars in S140 IRS

T. Preibisch1 and M. D. Smith2

1  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
2  Armagh Observatory, College Hill, Armagh BT61 9DG, Northern Ireland

(Received 24 October 2001 / Accepted 30 November 2001)

Abstract
The S140/L1204 cloud contains a deeply embedded region of star formation and a powerful molecular outflow. In this paper, we present images of the S140 region obtained in the light of the 2.12  $\mu$m molecular hydrogen emission line and adjacent continuum. Our images reveal several knots of H 2 line emission originating from shocked material close to IRS 1 as well as further out. Strong H 2 shock emission is found north-east of IRS1 (at position angle of ~20°-30°), as well as to the south-west of IRS1 (at position angles around ~190°-220°), clearly demonstrating the presence of outflow activity in the north-east/south-west direction. We also find patches of H 2 emission several arcminutes away from IRS1 at a position angles of $\sim $150° and $340\degr$, i.e. in directions consistent with the previously known north-west/south-east molecular outflow. Our results therefore provide evidence for the existence of two distinct bipolar outflow systems originating simultaneously from IRS 1. We also discuss general aspects of the star formation process in the S140 region. An inferred high ratio of stellar to gas mass suggests that the outflows have dispersed most of the cloud mass.


Key words: stars: individual: S140 IRS 1 -- stars: individual: S140 IRS 3 -- stars: formation -- stars: winds, outflows

Offprint request: T. Preibisch, preib@mpifr-bonn.mpg.de

SIMBAD Objects



© ESO 2002

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.