Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21933704s&link_type=abstract
American Astronomical Society, AAS Meeting #219, #337.04
Astronomy and Astrophysics
Astronomy
Scientific paper
High-mass stars play a decisive role in the evolution of galaxies. An exciting recent development in the understanding of those early evolutionary stages, based on a new study of the Orion BN/KL region, is that the disruption of a massive young stellar system can lead to an explosive event producing a wide-angle outflow. This is an entirely different phenomenon from the classical bipolar flows driven by YSO accretion disks. We report here preliminary results from a molecular-line study of a serendipitously discovered object, IRAS05506+2414, which most likely is only the second known example of this phenomenon in our Galaxy.
Our HST images show a fan-like spray of high-velocity (up to 350 km/s) elongated knots which appear to emanate from a bright compact central source. The physical properties (opening angle, outflow speeds, knot masses, Herbig-Haro-object like optical line emission) of the IRAS05506 wide-angle outflow are very similar to the one in Orion. A second jet engine, similar to those which drive the classical accretion-driven jets seen in low-mass YSOs, also appears to be operating simultaneously in IRAS05506. This is indicated by an optical jet-like feature aligned with a high-velocity (>100 km/s) molecular outflow which appears to be bipolar and nearly perpendicular to the average direction of the knot spray. Our molecular-line study includes (a) single-dish observations at 1.1-1.3 and 2.6-3 mm of high-density tracers such as HCO+, CS and SO, and mapping of the ambient molecular cloud in CO and 13CO using the ARO's 10- and 12-m dishes, and (b) interferometric observations at 2.6 and 1.3 mm with OVRO and the SMA of CO, 13CO, SO and SiO lines and the dust continuum. Preliminary results on the mass, density and temperature of the outflow and ambient cloud using simple excitation/radiative transfer models will be presented.
Claussen Mark J.
Morris Mark R.
Patel Nilanchal
Sahai Raghvendra
Sanchez Contreras Carmen
No associations
LandOfFree
The Interstellar Bullet Engine IRAS05506+2414: A Molecular-Line Study does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Interstellar Bullet Engine IRAS05506+2414: A Molecular-Line Study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Interstellar Bullet Engine IRAS05506+2414: A Molecular-Line Study will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1580723