Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...502..337m&link_type=abstract
Astrophysical Journal v.502, p.337
Astronomy and Astrophysics
Astronomy
57
Ism: Jets And Outflows, Ism: Individual Alphanumeric: Ggd 27, Ism: Individual Alphanumeric: Hh 80-81, Stars: Pre-Main-Sequence
Scientific paper
We report multi-epoch interferometric radio observations of the IRAS source 18162-2048 that drives the thermal radio jet in the HH 80-81/GGD 27 complex. Our main goal was to follow the proper motion and flux density decay of the two inner young jet condensations N4 and S4, discovered by Marti et al., on their way out from the driving source. The tangential velocity estimated for the condensations amounts to ~60 mas yr-1, equivalent to ~500 km s-1 at the distance of the complex. The brightness decay can be fitted by a power law of the time elapsed since ejection, yielding power law exponents of about -2 and -3 for the northern and southern condensations, respectively. We also discuss our observations in the context of simple biconical jet models, suggesting that both condensations are consistent with relatively weak density enhancements in the otherwise steady jet flow. Their fade in brightness seems to be in agreement with the density decay expected in a freely expanding jet.
Martí Josep
Reipurth Bo
Rodriguez Luis F.
No associations
LandOfFree
Proper Motions of the Inner Condensations in the HH 80-81 Thermal Radio Jet 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 Proper Motions of the Inner Condensations in the HH 80-81 Thermal Radio Jet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Proper Motions of the Inner Condensations in the HH 80-81 Thermal Radio Jet will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1343566