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A Sensitive Line Search in Circumstellar Envelopes

Published online by Cambridge University Press:  12 April 2016

Nguyen-Q-Rieu ,
S. Deguchi ,
H. Izumiura ,
N. Kaifu ,
M. Ohishi ,
H. Suzuki  and
N. Ukita
Nguyen-Q-Rieu
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, JAPAN
S. Deguchi
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, JAPAN
H. Izumiura
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, JAPAN
N. Kaifu
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, JAPAN
M. Ohishi
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, JAPAN
H. Suzuki
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, JAPAN
N. Ukita
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13, JAPAN

Abstract

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A molecular line search in the range between 85 and 89 GHz has been performed in the circumstellar envelopes of 11 evolved stars. Emissions of 29SiO J=2−1,28SiO J=2−1, HCN J=1−0, H13CN J=1−0, HC5 N J=33−32, HCO+ J=1−0 transitions and other transitions of C2 H, C4 H, and C3 N have been observed in 11 stars. We have detected the ground state 29SiO J=2−1 maser in several stars. We have also detected HCN emission in VY CMa. A narrow H13CN spike feature near the central velocity has been found in the spectrum of CRL 2688.

Type
Part II. Mass-Losing Stars in Different Stages of Evolution
Information
International Astronomical Union Colloquium , Volume 108: Atmospherics Diagnostics of Stellar Evolution: Chemical Peculiarity, Mass Loss, and Explosion , 1988 , pp. 185 - 186
Copyright
Copyright © Springer-Verlag 1988

References

Bieging, J.H., and Nguyen-Q-Rieu, , 1988, Ap. J. (in press)Google Scholar
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