MERLIN radio detection of an interaction zone within a binary Orion proplyd system
Abstract
Presented here are high angular resolution MERLIN 5 GHz (6 cm) continuum observations of the binary proplyd system, LV 1 in the Orion nebula, which consists of proplyd 168--326SE and its binary proplyd companion 168--326NW (separation 0.4 arcsec). Accurate astrometric alignment allows a detailed comparison between these data and published HST PC Halpha and [Oiii] images. Thermal radio sources coincide with the two proplyds and originate in the ionized photoevaporating flows seen in the optical emission lines. Flow velocities of approx 50 km/s from the ionized proplyd surfaces and \geq 100 km/s from a possible micro-jet have been detected using the Manchester Echelle spectrometer. A third radio source is found to coincide with a region of extended, high excitation, optical line emission that lies between the binary proplyds 168--326SE/326NW . This is modelled as a bowshock due to the collision of the photoevaporating flows from the two proplyds. Both a thermal and a non-thermal origin for the radio emission in this collision zone are considered.
Keywords
Cite
@article{arxiv.astro-ph/0201087,
title = {MERLIN radio detection of an interaction zone within a binary Orion proplyd system},
author = {M. F. Graham and J. Meaburn and S. T. Garrington and T. J. O'Brien and W. J. Henney and C. R. O'Dell},
journal= {arXiv preprint arXiv:astro-ph/0201087},
year = {2016}
}
Comments
23 pages, 9 figures, accepted by ApJ