AMI radio continuum observations of young stellar objects with known outflows

Details AMI radio continuum observations of young stellar objects with known outflows AMI radio continuum observations of young stellar objects with known outflows

2012-03-15

arxiv.org/abs/1203.3381v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

accepted MNRAS

Scientific paper

We present 16 GHz (1.9 cm) deep radio continuum observations made with the Arcminute Microkelvin Imager (AMI) of a sample of low-mass young stars driving jets. We combine these new data with archival information from an extensive literature search to examine spectral energy distributions (SEDs) for each source and calculate both the radio and sub-mm spectral indices in two different scenarios: (1) fixing the dust temperature (Td) according to evolutionary class; (2) allowing Td to vary. We use the results of this analysis to place constraints on the physical mechanisms responsible for the radio emission. From AMI data alone, as well as from model fitting to the full SED in both scenarios, we find that 80 per cent of the objects in this sample have spectral indices consistent with free-free emission. We find an average spectral index in both Td scenarios consistent with free-free emission. We examine correlations of the radio luminosity with bolometric luminosity, envelope mass, and outflow force and find that these data are consistent with the strong correlation with envelope mass seen in lower luminosity samples. We examine the errors associated with determining the radio luminosity and find that the dominant source of error is the uncertainty on the opacity index, beta. We examine the SEDs for variability in these young objects, and find evidence for possible radio flare events in the histories of L1551 IRS 5 and Serpens SMM 1.

Affiliated with

Also associated with

No associations

Rating

AMI radio continuum observations of young stellar objects with known 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 AMI radio continuum observations of young stellar objects with known outflows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and AMI radio continuum observations of young stellar objects with known outflows will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-30958