SIMBAD references

2004ApJ...608..330B - Astrophys. J., 608, 330-340 (2004/June-2)

Massive molecular outflows at high spatial resolution.


Abstract (from CDS):

We present high spatial resolution Plateau de Bure Interferometer CO (2-1) and SiO (2-1) observations of one intermediate-mass and one high-mass star-forming region. The intermediate-mass region IRAS 20293+3952 exhibits four molecular outflows, one being as collimated as the highly collimated jetlike outflows observed in low-mass star formation sources. Furthermore, comparing the data with additional infrared H2and centimeter observations, we see indications that the nearby ultracompact H II region triggers a shock wave interacting with the outflow. The high-mass region IRAS 19217+1651 exhibits a bipolar outflow as well, and the region is dominated by the central driving source. Adding two more sources from the literature, we compare position-velocity diagrams of the intermediate-to-high-mass sources with previous studies in the low-mass regime. We find similar kinematic signatures; some sources can be explained by jet-driven outflows, whereas others are better constrained by wind-driven models. The data also allow us to estimate accretion rates varying from a few times 10–5 M/yr for the intermediate-mass sources to a few times 10–4 M/yr for the high-mass source, consistent with models explaining star formation of all masses via accretion processes.

Abstract Copyright:

Journal keyword(s): Accretion, Accretion Disks - ISM: Individual: Alphanumeric: IRAS 19217+1651 - ISM: Individual: Alphanumeric: IRAS 20293+3952 - ISM: Jets and Outflows - Stars: Formation - Techniques: Interferometric

Nomenclature: Fig.3, Table 3: [BSG2004] IRAS 20293+3952 mm N (Nos 1-3). Table 4: [BSG2004] IRAS 20293+3952 outflow A (Nos A-D).

Simbad objects: 28

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2004ApJ...608..330B and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact