EDP Sciences
Free access
Volume 427, Number 3, December I 2004
Page(s) 895 - 899
Section Interstellar and circumstellar matter
DOI http://dx.doi.org/10.1051/0004-6361:20041600

A&A 427, 895-899 (2004)
DOI: 10.1051/0004-6361:20041600

Research Note

Millimeter observations of the HH 222 region

A. Castets1, B. Reipurth2 and L. Loinard3

1  Observatoire de Bordeaux, BP 79, 33270 Floirac, France
    e-mail: Alain.Castets@obs.u-bordeaux1.fr
2  Institute for Astronomy, University of Hawaii, 640 North A'ohoku Place, Hilo, HI 96720, USA
3  Instituto de Astronomía, UNAM, Apdo Postal 72-3 (Xangari), 58089 Morelia, Michoacán, México

(Received 5 July 2004 / Accepted 13 September 2004 )

The HH 222 streamers in Orion and their associated non-thermal radio jet form a unique object, whose nature remains enigmatic. We have carried out a set of detailed millimeter observations around the non-thermal radio source in several transitions of the CO, and CS molecules. We find that the radio source is not associated with any molecular outflow nor located within a dense molecular core, and is therefore very unlikely to be a newborn star. The observations are in principle consistent with the radio source being a more evolved T Tauri star undergoing an energetic event, but it could also be an evolved object (an X-ray binary or a microquasar) accidentally passing through the large Orion cloud complex.

Key words: ISM: jets and outflows -- ISM: Herbig-Haro objects -- ISM: molecules -- stars: formation -- stars: pre-main sequence -- radio lines: ISM

SIMBAD Objects

© ESO 2004