Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-03-29
Astronomy and Astrophysics
Astrophysics
To appear in The Astrophysical Journal Letters
Scientific paper
10.1086/320031
While observational evidence for the episodic nature of young stellar outflows continues to mount, existing numerical and theoretical models of molecular outflows assume they are formed by the interaction of a non-episodic wind from a young stellar object with an ambient cloud. In this Letter we estimate and discuss the effects of episodicity on the mass-velocity and position-velocity relations observed in molecular outflows. We explain how many recent observational results disagree with the predictions of non-episodic outflow models, and we offer simple explanations for the discrepancies. In particular, we discuss how an episodic stellar outflow can steepen the power-law slope of the mass-velocity relation in a molecular outflow. And, we illustrate how an episodic outflow can produce multiple "Hubble-wedges'' in the position-velocity distribution of a molecular outflow. With a little more information than we have now, it may be possible to use the "fossil record" embedded in a molecular outflow's mass-velocity and position-velocity relations to reconstruct the history of a young stellar object's mass ejection episodes.
Arce Hector G.
Goodman Alyssa A.
No associations
LandOfFree
The Mass-Velocity and Position-Velocity Relations in Episodic Outflows 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 Mass-Velocity and Position-Velocity Relations in Episodic Outflows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Mass-Velocity and Position-Velocity Relations in Episodic Outflows will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-418699