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A Survey of Radio Recombination Line Emission From the Galactic Center Region

Published online by Cambridge University Press:  23 September 2016

K. R. Anantharamaiah  and
Farhad Yusef-Zadeh
K. R. Anantharamaiah
Affiliation:
NRAO-VLA, P.O. Box O, Socorro, NM 87801
Farhad Yusef-Zadeh
Affiliation:
Laboratory for Astronomy and Solar Physics, NASA/Goddard Space Flight Center and Northwestern University

Abstract

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Preliminary results of a systematic survey of H78α, H91α and H98β emission from the inner 40′ of the Galactic center region are presented. This region consists of two prominent continuum features, the Sgr A complex and the radio continuum Arc. In spite of much nonthermal emission arising from these two features, we detected strong line emission with large line widths in more than half of the observed 130 positions. Many of the detections are new, in particular −50 km s−1 ionized gas linking the Sgr A complex and the Arc, β line emission from GO.1+0.08 (the arched filaments), and α line emission from the loop-like structures which surround the non-thermal filaments near G0.2−0.05. We find that much of the detected lines are probably associated with the −50 km s−1 and the 20 km s−1 molecular clouds, known to lie near the Galactic center. We present line profiles of a number of Galactic center sources including Sgr B1, Sgr C and Sgr D.

Type
The Large - Scale Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 136: The Galactic Center , 1989 , pp. 159 - 166
Copyright
Copyright © Kluwer 1989 

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