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2003•Astronomy ReportsRequires access

Observations of cyanoacetylene sources

А. В. Алакоз, Sergei V. Kalenskii, M. A. Voronkov, Vyacheslav I. Slysh

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Abstract

Thirty-four Galactic star-forming regions have been observed in the J =4−3 line of cyanoacetylene (HC 3 N) at 36.4 GHz. Emission was detected toward 17 sources. The HC 3 N column density was determined in the detected sources, and in eight of them (NGC 2264, L379, W51E1/E2, DR 21 West, DR 21 (OH), DR 21, S140, and Cep A), the relative cyanoacetylene abundance was estimated. The HC 3 N abundance in these objects is about 1–70×10 −10 .

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What this paper is about

Thirty-four Galactic star-forming regions have been observed in the J =4−3 line of cyanoacetylene (HC 3 N) at 36.4 GHz. Emission was detected toward 17 sources. The HC 3 N column density was determined in the detected sources, and in eight of them (NGC 2264, L379, W51E1/E2, DR 21 West, DR 21 (OH), DR 21, S140, and Cep A), the relative cyanoacetylene abundance was estimated. The HC 3 N abundance in these objects is about 1–70×10 −10 .

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Available abstract

Thirty-four Galactic star-forming regions have been observed in the J =4−3 line of cyanoacetylene (HC 3 N) at 36.4 GHz. Emission was detected toward 17 sources. The HC 3 N column density was determined in the detected sources, and in eight of them (NGC 2264, L379, W51E1/E2, DR 21 West, DR 21 (OH), DR 21, S140, and Cep A), the relative cyanoacetylene abundance was estimated. The HC 3 N abundance in these objects is about 1–70×10 −10 .

Key concepts: Cyanoacetylene, Physics, Astrophysics, Abundance (ecology), Cupressaceae, Astrochemistry, Line (geometry), Astronomy

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