A BIPOLAR-OUTFLOW OBJECT IN THE FIELD OF M-36

Citation
Ea. Magnier et al., A BIPOLAR-OUTFLOW OBJECT IN THE FIELD OF M-36, Astronomy and astrophysics, 305(3), 1996, pp. 936-943
Citations number
25
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046361
Volume
305
Issue
3
Year of publication
1996
Pages
936 - 943
Database
ISI
SICI code
0004-6361(1996)305:3<936:ABOITF>2.0.ZU;2-N
Abstract
We have discovered an object in the field of the Galactic open cluster M36 which exhibits a nebulous taillike structure and a high velocity outflow. We first observed the jet morphology in optical images taken at the Michigan-Dartmouth-MIT (MDM) Observatory at Kitt Peak. This sou rce, located at 05(h) 36(m) 05(s).9, 34 degrees 06' 12 ''.1 (J2000), i s found to be coincident with IRAS 05327+3404. CO (1 - 0) observations (Wouterloot & Brand 1989) showed this object to be a strong emission- line source. We performed CO (2 - 1) observations at the James-Clerk-M axwell Telescope at Mauna Kea which suggest that the outflow is bipola r in nature. Optical spectroscopy obtained at the La Palma Isaac-Newto n 2.5 m Telescope shows strong emission lines, reminiscent of Herbig-H aro emission and confirming the outflow. The object is probably not as sociated with M 36, and may be a far-flung member of the nearby region of star formation, S 235. The optical spectra are quite unusual. We c onclude that the spectra represent two views of the same jet structure from different viewing angles, one the result of a reflection off the nebulous tail. The IRAS fluxes, optical morphology, and aspects of th e optical spectra are similar to the FU Orionis system L 1551 IRS 5, a nd may indicate that this object is also an FU Orionis star.