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NGU88 - A sensitive line search in circumstellar envelopes

Short title: Nguyen-Quang-Rieu et al. (1988)
Authors: Nguyen-Quang-Rieu Deguchi, S. Izumiura, H. Kaifu, N. Ohishi, M. Suzuki, H. Ukita, Nobuharu
Journal: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 330, July 1, 1988, p. 374-384. Research supported by the University of Tokyo.
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Detection table: Show detection table (9 detection) Non-detection table: Show non-detection table (18 non-detection)

Abstract
A molecular line search in the range between 85 and 89 GHz has been performed in the circumstellar envelope of 11 evolved stars using the 45 m telescope at Nobeyama Radio Observatory equipped with an acoustooptical spectrometer with a 2 GHz bandwidth. Emissions of ²⁹SiO, ²⁸SiO, HCN, H¹³CN, HC₅N, HCO⁺, C₂H, C₄H, and C₃N have been observed. The authors have detected the ground-state ²⁹SiO J = 2-1 maser in several stars. They have also detected HCN emission in VY CMa, an oxygen-rich star.

Abstract

A molecular line search in the range between 85 and 89 GHz has been performed in the circumstellar envelope of 11 evolved stars using the 45 m telescope at Nobeyama Radio Observatory equipped with an acoustooptical spectrometer with a 2 GHz bandwidth. Emissions of ²⁹SiO, ²⁸SiO, HCN, H¹³CN, HC₅N, HCO⁺, C₂H, C₄H, and C₃N have been observed. The authors have detected the ground-state ²⁹SiO J = 2-1 maser in several stars. They have also detected HCN emission in VY CMa, an oxygen-rich star.

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Detection table from Nguyen-Quang-Rieu et al. (1988)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Line	V_peak	T_a	∫T_a dv	Telescope	List	Detection	Class	Dist. (parallax)	Ref.
	(J2000)	(J2000)	(deg.)	(deg.)			SiO	(km/s)	(K)	(K*km/s)			Yes/No		(kpc)
1	03 53 28.9	+11 24 22.7	177.9546	-31.4117	G177.955-31.412	IRAS03507+1115	86.8 GHz;	35	0.72		NRO	NRO	+H₂O -CH₃OH II +OH +SiO	EVOLVED		NGU88
2	04 42 53.7	+36 06 52.6	166.4460	-6.5276	G166.446-6.528	IRAS04395+3601	86.8 GHz;	-24	< 0.08		NRO	NRO	-H₂O -OH +SiO	SFR_MIXED		NGU88
3	10 16 2.2	+30 34 18	197.7150	55.9641	G197.715+55.964	IRAS10131+3049	86.8 GHz;	-1	0.13		NRO	NRO	-H₂O -CH₃OH I -OH +SiO	EVOLVED		NGU88
4	10 51 37.3	-21 15 0.5	268.9651	33.6014	G268.965+33.601	IRAS10491-2059	86.8 GHz;	-13	< 0.08		NRO	NRO	-H₂O -OH +SiO	EVOLVED		NGU88
5	19 15 23.2	-07 02 50	29.3383	-8.5153	G29.338-8.516	IRAS19126-0708	86.8 GHz;	-28	0.28	-8.515	NRO	NRO	-H₂O -CH₃OH II +SiO	EVOLVED		NGU88
6	19 50 34	+32 54 51.2	68.5390	3.2761	G68.539+3.276	IRAS19486+3247	86.8 GHz;	12	0.45		NRO	NRO	-H₂O -OH +SiO	EVOLVED		NGU88
7	23 19 11.7	+17 11 28.4	93.5224	-40.3545	G93.523-40.354	IRAS23166+1655	86.8 GHz;	-24	< 0.06		NRO	NRO	+H₂O -CH₃OH II -OH +SiO	EVOLVED		NGU88
8	23 34 28	+43 33 02	108.4559	-17.1471	G108.455-17.147	IRAS23320+4316	86.8 GHz;	-15	0.05		NRO	NRO	-H₂O -CH₃OH II +SiO	EVOLVED		NGU88
9	21 02 18.7	+36 41 38	80.1675	-6.5030	G80.168-6.503	CRL2688	86.8 GHz;	-32	< 0.07		NRO	NRO	-H₂O -CH₃OH II +SiO	GALAXY		NGU88

Non-detection table from Nguyen-Quang-Rieu et al. (1988)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Line	T_a	∫T_a dv	Date	Telescope	List	Detection	Class	Ref.
	(J2000)	(J2000)	(deg.)	(deg.)			SiO	(K)	(K*km/s)				Yes/No
1	03 53 28.9	+11 24 22.7	177.9546	-31.4117	G177.955-31.412	IRAS03507+1115	85.2 GHz;	0.68		1987-03-05	NRO	NRO	+H₂O -CH₃OH II +OH +SiO	EVOLVED	NGU88
2	03 53 28.9	+11 24 22.7	177.9546	-31.4117	G177.955-31.412	IRAS03507+1115	86.2 GHz;	29.4		1987-03-05	NRO	NRO	+H₂O -CH₃OH II +OH +SiO	EVOLVED	NGU88
3	04 42 53.7	+36 06 52.6	166.4460	-6.5276	G166.446-6.528	IRAS04395+3601	85.2 GHz;	< 0.08		1987-03-05	NRO	NRO	-H₂O -OH +SiO	SFR_MIXED	NGU88
4	04 42 53.7	+36 06 52.6	166.4460	-6.5276	G166.446-6.528	IRAS04395+3601	86.2 GHz;	< 0.09		1987-03-05	NRO	NRO	-H₂O -OH +SiO	SFR_MIXED	NGU88
5	10 16 2.2	+30 34 18	197.7150	55.9641	G197.715+55.964	IRAS10131+3049	85.2 GHz;	< 0.04		1987-03-05	NRO	NRO	-H₂O -CH₃OH I -OH +SiO	EVOLVED	NGU88
6	10 16 2.2	+30 34 18	197.7150	55.9641	G197.715+55.964	IRAS10131+3049	86.2 GHz;	< 0.04		1987-03-05	NRO	NRO	-H₂O -CH₃OH I -OH +SiO	EVOLVED	NGU88
7	10 51 37.3	-21 15 0.5	268.9651	33.6014	G268.965+33.601	IRAS10491-2059	85.2 GHz;	< 0.08		1987-03-05	NRO	NRO	-H₂O -OH +SiO	EVOLVED	NGU88
8	10 51 37.3	-21 15 0.5	268.9651	33.6014	G268.965+33.601	IRAS10491-2059	86.2 GHz;	< 0.06		1987-03-05	NRO	NRO	-H₂O -OH +SiO	EVOLVED	NGU88
9	19 15 23.2	-07 02 50	29.3383	-8.5153	G29.338-8.516	IRAS19126-0708	85.2 GHz;	< 0.07		1987-03-05	NRO	NRO	-H₂O -CH₃OH II +SiO	EVOLVED	NGU88
10	19 15 23.2	-07 02 50	29.3383	-8.5153	G29.338-8.516	IRAS19126-0708	86.2 GHz;	11.5	-8.515	1987-03-05	NRO	NRO	-H₂O -CH₃OH II +SiO	EVOLVED	NGU88
11	19 50 34	+32 54 51.2	68.5390	3.2761	G68.539+3.276	IRAS19486+3247	85.2 GHz;	0.07		1987-03-05	NRO	NRO	-H₂O -OH +SiO	EVOLVED	NGU88
12	19 50 34	+32 54 51.2	68.5390	3.2761	G68.539+3.276	IRAS19486+3247	86.2 GHz;	25.5		1987-03-05	NRO	NRO	-H₂O -OH +SiO	EVOLVED	NGU88
13	23 19 11.7	+17 11 28.4	93.5224	-40.3545	G93.523-40.354	IRAS23166+1655	85.2 GHz;	< 0.07		1987-03-05	NRO	NRO	+H₂O -CH₃OH II -OH +SiO	EVOLVED	NGU88
14	23 19 11.7	+17 11 28.4	93.5224	-40.3545	G93.523-40.354	IRAS23166+1655	86.2 GHz;	< 0.08		1987-03-05	NRO	NRO	+H₂O -CH₃OH II -OH +SiO	EVOLVED	NGU88
15	23 34 28	+43 33 02	108.4559	-17.1471	G108.455-17.147	IRAS23320+4316	85.2 GHz;	< 0.07		1987-03-05	NRO	NRO	-H₂O -CH₃OH II +SiO	EVOLVED	NGU88
16	23 34 28	+43 33 02	108.4559	-17.1471	G108.455-17.147	IRAS23320+4316	86.2 GHz;	< 0.05		1987-03-05	NRO	NRO	-H₂O -CH₃OH II +SiO	EVOLVED	NGU88
17	21 02 18.7	+36 41 38	80.1675	-6.5030	G80.168-6.503	CRL2688	85.2 GHz;	< 0.04		1987-03-05	NRO	NRO	-H₂O -CH₃OH II +SiO	GALAXY	NGU88
18	21 02 18.7	+36 41 38	80.1675	-6.5030	G80.168-6.503	CRL2688	86.2 GHz;	< 0.06		1987-03-05	NRO	NRO	-H₂O -CH₃OH II +SiO	GALAXY	NGU88

Distribution of sources in all sky (l,b)

Distribution of sources in all sky using Aladin

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Distribution of sources in IRAS color-color diagram

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Original color diagram is taken form van der Veen & Habing (1987)

Type	Description
I	Oxygen-rich non-variable stars without circumstellar shells
II	Variable stars with "young" O-rich circumstellar shells
IIIa	Variable stars with more evolved O-rich circumstellar shells
IIIb	Variable stars with thick O-rich circumstellar shells
IV	Variable stars with very thick O-rich circumstellar shells
V	Planetary nebulae and non- variable stars with very cool circumstellar shells
VIa	Variable stars with relatively cold dust at large distances; a significant part of the stars is carbon-rich
VIb	Variable stars with relatively hot dust close to the star and relatively cold dust at large distances; Some of the objects have proven to be O-rich
VII	Variable stars with more evolved C-rich circumstellar shells
VIII	Different sort of objects

Distribution of the detection velocities versus galactic longitude from NGU88

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