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Title:
A bipolar outflow of ionized gas in K3-50A: H76 alpha radio recombination line and continuum observations of K3-50
Authors:
Depree, C. G.; Goss, W. M.; Palmer, Patrick; Rubin, Robert H.
Affiliation:
AA(North Carolina Univ., Chapel Hill, NC, US), AB(North Carolina Univ., Chapel Hill, NC, US), AC(Chicago Univ., Chicago, IL, US), AD(Chicago Univ., Chicago, IL, US)
Publication:
The Astrophysical Journal, vol. 428, no. 2, pt. 1, p. 670-679 (ApJ Homepage)
Publication Date:
06/1994
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
BIPOLARITY, H II REGIONS, H LINES, HELIUM ATOMS, INTERSTELLAR MATTER, IONIZED GASES, KINEMATICS, MASS FLOW, RADIO FREQUENCIES, ANGULAR RESOLUTION, GRADIENTS, JET FLOW, SPECTRAL LINE WIDTH, VELOCITY, VERY LARGE ARRAY (VLA)
DOI:
10.1086/174277
Bibliographic Code:
1994ApJ...428..670D

Abstract

The H II regions near K3-50 (G70.3 + 1.6) have been imaged at high angular resolution (approximately 1 sec .3) in the continuum and the recombination lines H76alpha and He76(sub alpha using the Very Large Array (VLA). The helium line is detected in only the brightest component K3-50A while the hydrogen line is detected in three components (K3-50A, B and C1). K3-50A shows a pronounced velocity gradient of approximately 150 km/sec/pc along its major axis (P.A. = 160 deg); in addition a wide range of line widths are observed, from 20 to 65 km/sec. Kinematics from the line data and the morphology of the continuum emission suggest that the ionized material associated with K3-50A is undergoing a high-velocity bipolar outflow.

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