Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...482..355s&link_type=abstract
Astrophysical Journal v.482, p.355
Astronomy and Astrophysics
Astronomy
30
Ism: Jets And Outflows, Ism: Individual Alphanumeric: On2, Ism: Molecules, Stars: Formation, Ism: H Ii Regions
Scientific paper
We present 5"--10" resolution images of the ON2 cloud core in the molecular lines 12CO(J = 1--0), SiO(v = 0, J = 2--1), H13CO+(J = 1--0), and SO2(83,5--92,8) and 3 millimeter continuum obtained with the Berkeley-Illinois-Maryland Array (BIMA) millimeter-wave interferometer. For the 12CO line, additional observations were obtained with the NRAO 4 12 m telescope to recover extended emission missed by the interferometer. We find evidence for at least four massive, energetic molecular outflows from young stellar objects within a 1.5 pc region. Three of these are identified by bipolar high-velocity 12CO emission, and a fourth is suggested by SiO and SO2 emission. Continuum emission is detected from the ultracompact (UC) H II region, G75.78+0.34, and also from two deeply embedded YSOs, one of which (source 3) may be the driving engine of the dominant central outflow G75 C. Approximately half of the SiO emission observed is not obviously linked to the proposed molecular outflows and perhaps traces additional shock activity within ON2. The high-resolution observations support the conclusion reached previously that a near-simultaneous massive star formation event occurred in the ON2 complex ~104 yr ago. The presence of molecular outflows in the cloud core shows that this event was not isolated to the cloud edges.
Churchwell Edward
Shepherd Debra S.
Wilner David J.
No associations
LandOfFree
A High Spatial Resolution Study of the ON2 Massive Star-forming Region 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 A High Spatial Resolution Study of the ON2 Massive Star-forming Region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A High Spatial Resolution Study of the ON2 Massive Star-forming Region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1472773