Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-04-23
Mon.Not.Roy.Astron.Soc. 319 (2000) 991
Astronomy and Astrophysics
Astrophysics
10 pages, 10 figures. To appear in MNRAS. Uses mn.sty. Also available at http://www.astro.phys.ethz.ch/papers/smith/smith_p_m.
Scientific paper
10.1046/j.1365-8711.2000.03564.x
We present SCUBA observations of the protomultiple system NGC1333/IRAS4 at 450um and 850um. The 850um map shows significant extended emission which is most probably a remnant of the initial cloud core. At 450um, the component 4A is seen to have an elongated shape suggestive of a disk. Also we confirm that in addition to the 4A and 4B system, there exists another component 4C, which appears to lie out of the plane of the system and of the extended emission. Deconvolution of the beam reveals a binary companion to IRAS4B. Simple considerations of binary dynamics suggest that this triple 4A-4BI-4BII system is unstable and will probably not survive in its current form. Thus IRAS4 provides evidence that systems can evolve from higher to lower multiplicity as they move towards the main sequence. We construct a map of spectral index from the two wavelengths, and comment on the implications of this for dust evolution and temperature differences across the map. There is evidence that in the region of component 4A the dust has evolved, probably by coagulating into larger or more complex grains. Furthermore, there is evidence from the spectral index maps that dust from this object is being entrained in its associated outflow.
Bonnell Ian A.
Emerson James P.
Jenness Tim
Smith Kester W.
No associations
LandOfFree
NGC1333/IRAS4: A multiple star formation laboratory 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 NGC1333/IRAS4: A multiple star formation laboratory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NGC1333/IRAS4: A multiple star formation laboratory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-671536