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DEG01 - SiO Maser Survey of Southern IRAS Sources

Short title: Deguchi et al. (2001)
Authors: Deguchi, Shuji Nakashima, Jun-Ichi Balasubramanyam, Ramesh
Journal: Publications of the Astronomical Society of Japan, vol.53, no. 2, p. 305-314.
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Abstract
We have surveyed 163 southern IRAS sources in the SiO J = 2 - 1 v = 1 maser line at 86 GHz, obtaining 38 (22 new and 16 previously known) detections. These detections include 6 stars not previously detected in OH 1612 MHz surveys, and 4 sources assigned incorrect OH radial velocities. The distance reachable in this survey turned out to be about 4 kpc. The local velocity dispersion near the Sun were found to be approximately 30 km s^-1 for these IRAS/SiO sources. A relatively high concentration of the SiO detected sources were found at the area 320� < l < 340� (toward Norma tangent). The estimated distances for these sources suggest that this concentration is spread between 2 and 6 kpc from the Sun, peaking on the Scutum-Crux arm.	Target sources: IRAS

Abstract

We have surveyed 163 southern IRAS sources in the SiO J = 2 - 1 v = 1 maser line at 86 GHz, obtaining 38 (22 new and 16 previously known) detections. These detections include 6 stars not previously detected in OH 1612 MHz surveys, and 4 sources assigned incorrect OH radial velocities. The distance reachable in this survey turned out to be about 4 kpc. The local velocity dispersion near the Sun were found to be approximately 30 km s^-1 for these IRAS/SiO sources. A relatively high concentration of the SiO detected sources were found at the area 320� < l < 340� (toward Norma tangent). The estimated distances for these sources suggest that this concentration is spread between 2 and 6 kpc from the Sun, peaking on the Scutum-Crux arm.

Target sources:
IRAS

Input tables: Table 1 and 2
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Detection table from Deguchi et al. (2001)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Spectra	Line	V_range	V_peak	T_a	∫T_a dv	RMS	Detection	Class	Dist. (parallax)
	(J2000)	(J2000)	(deg.)	(deg.)				SiO	(km/s)	(km/s)	(K)	(K*km/s)	(Jy)	Yes/No		(kpc)
1	02 52 22.8	-87 20 19.2	301.3938	-29.4191	G301.394-29.419	03074-8732	Spectra	86.2 GHz;		7.3	0.146	0.352	0.044	+H₂O +OH +SiO	EVOLVED
2	03 32 30.2	-76 26 57.3	291.9948	-37.0426	G291.995-37.043	03336-7636		86.2 GHz;		2.0	0.174	0.378	0.026	+OH +SiO	EVOLVED
3	04 09 35.3	-81 51 16.9	295.6112	-32.2229	G295.611-32.223	04140-8158	Spectra	86.2 GHz;		21.1	0.693	3.277	0.047	+H₂O +OH +SiO	EVOLVED
4	04 39 15.6	-74 21 43.4	286.9707	-34.7448	G286.971-34.745	04404-7427	Spectra	86.2 GHz;		-11.3	1.383	2.012	0.052	+OH +SiO	EVOLVED
5	05 04 50.4	-21 54 16.5	222.6667	-32.7161	G222.667-32.715	05027-2158	Spectra	86.2 GHz;		-27.2	0.554	1.496	0.052	+H₂O +OH +SiO	EVOLVED
6	05 10 8.4	-64 19 3.9	274.3001	-35.1641	G274.300-35.164	05098-6422	Spectra	86.2 GHz;	5.9c	31.5	0.653	1.935	0.050	+OH +SiO	EVOLVED
7	05 35 59.5	-44 04 36.9	249.9806	-31.5937	G249.981-31.594	05345-4406	Spectra	86.2 GHz;		17.1	0.208	0.431	0.028	+OH +SiO	EVOLVED
8	09 04 51.8	-28 10 35.4	253.9853	12.4773	G253.985+12.477	09027-2758	Spectra	86.2 GHz;		91.0	0.106	0.49	0.045	+OH +SiO	EVOLVED
9	09 52 4.5	-54 53 23.3	279.0044	-0.5764	G279.004-0.576	09503-5439	Spectra	86.2 GHz;		-64.0	0.068	0.169	0.014	-OH +SiO	EVOLVED
10	10 51 31.3	-58 31 4.8	287.8041	0.7868	G287.804+0.787	10495-5815	Spectra	86.2 GHz;		-15.9	0.077	0.419	0.021	+OH +SiO	EVOLVED
11	13 23 29.3	-55 52 35.2	307.4478	6.7140	G307.448+6.714	13203-5536	Spectra	86.2 GHz;		-7.2	0.134	0.304	0.027	+OH +SiO	EVOLVED
12	14 51 30.5	-58 25 13.3	318.1213	0.8652	G318.121+0.865	14477-5812	Spectra	86.2 GHz;		3.1	0.124	0.435	0.023	+OH +SiO	EVOLVED
13	15 19 24.5	-57 34 36.9	321.7535	-0.2160	G321.753-0.216	15155-5723	Spectra	86.2 GHz;		-11.1	0.22	0.542	0.043	+OH +SiO	EVOLVED
14	15 26 43	-54 56 9.2	324.0474	1.4400	G324.047+1.440	15229-5445	Spectra	86.2 GHz;		-18.1	0.166	0.383	0.025	+OH +SiO	EVOLVED
15	15 54 46	-52 16 29	328.9706	1.0754	G328.971+1.075	15509-5207	Spectra	86.2 GHz;		-52.2	0.188	0.501	0.043	+OH +SiO	EVOLVED
16	15 58 1.6	-54 16 59.1	328.0527	-0.7762	G328.053-0.776	15541-5408	Spectra	86.2 GHz;		-75.1	0.234	0.166	0.044	+OH +SiO	SFR_MIXED
17	16 04 1.1	-41 34 20.5	337.1888	8.1456	G337.189+8.146	16005-4126	Spectra	86.2 GHz;		-66.5	0.111	0.269	0.022	-OH +SiO	SFR
18	16 11 52.9	-58 38 14.8	326.5757	-5.2967	G326.576-5.296	16077-5830	Spectra	86.2 GHz;		-41.3	0.314	0.507	0.049	+OH +SiO	EVOLVED
19	16 25 43.6	-50 55 42.5	333.4125	-1.1981	G333.412-1.198	16219-5048	Spectra	86.2 GHz;		-54.7	0.157	0.253	0.042	-H₂O +OH +SiO	EVOLVED
20	16 36 32	-48 54 38.8	336.0742	-1.0831	G336.075-1.084	16327-4848	Spectra	86.2 GHz;		-64.6	0.095	0.35	0.027	-H₂O +OH +SiO	EVOLVED
21	17 02 10.6	-33 19 31.2	351.1313	5.2059	G351.131+5.206	16589-3315	Spectra	86.2 GHz;		0.4	0.209	0.375	0.038	+OH +SiO	EVOLVED
22	17 15 22.9	-27 10 38.6	357.8094	6.5423	G357.809+6.542	17122-2707	Spectra	86.2 GHz;		-13.8	0.219	0.253	0.040	+OH +SiO	EVOLVED
23	17 17 48.5	-62 29 3.6	328.8353	-13.9493	G328.835-13.949	17131-6225	Spectra	86.2 GHz;		-59.8	0.457	0.821	0.053	-OH +SiO	EVOLVED
24	17 36 37	-62 35 56.4	329.8800	-15.8709	G329.880-15.871	17319-6234	Spectra	86.2 GHz;		-8.3	0.414	0.858	0.044	+OH +SiO	EVOLVED
25	17 40 5.8	-30 02 4.9	358.4335	0.4442	G358.436+0.442	17368-3000	Spectra	86.2 GHz;		5.1	0.151	0.431	0.031	+OH +SiO	EVOLVED
26	18 50 29.3	-47 59 11	348.2239	-19.6529	G348.224-19.653	18467-4802	Spectra	86.2 GHz;		49.0	0.233	0.258	0.050	+H₂O +OH +SiO	EVOLVED
27	20 07 41.9	-42 32 21.3	357.6925	-31.4992	G357.692-31.499	20042-4241	Spectra	86.2 GHz;		-23.2	0.226	0.713	0.053	-H₂O -OH +SiO	EVOLVED
28	20 14 44.6	-46 58 57.5	352.6660	-33.3165	G352.666-33.316	20111-4708	Spectra	86.2 GHz;		7.1	0.402	0.778	0.043	+SiO	EVOLVED
29	20 18 57.9	-71 43 31.4	323.1096	-32.4793	G323.110-32.479	20135-7152	Spectra	86.2 GHz;		-1.1	0.799	1.21	0.050	+OH +SiO	EVOLVED
30	20 21 02	-56 11 3.3	341.6108	-34.5817	G341.611-34.582	20171-5620	Spectra	86.2 GHz;		-45.3	0.139	0.199	0.029	+SiO	EVOLVED
31	20 32 33.6	-21 41 26	22.9423	-31.4454	G22.942-31.445	20296-2151	Spectra	86.2 GHz;		7.2	0.233	0.381	0.051	+H₂O +OH +SiO	EVOLVED
32	20 37 22.6	-30 10 27.7	13.5943	-34.9115	G13.594-34.912	20343-3020	Spectra	86.2 GHz;		-24.1	0.258	0.438	0.053	+OH +SiO	EVOLVED
33	20 53 33.8	-71 51 27.4	322.0531	-35.0364	G322.053-35.036	20484-7202	Spectra	86.2 GHz;		-31.6	0.24	0.535	0.031	-H₂O -OH +SiO	EVOLVED
34	20 56 22.7	-54 19 28.2	343.3730	-39.7588	G343.373-39.759	20526-5431	Spectra	86.2 GHz;		31.5	0.264	0.666	0.058	-OH +SiO	EVOLVED
35	20 58 28.2	-65 38 7.6	329.1687	-37.4898	G329.169-37.490	20541-6549	Spectra	86.2 GHz;		-5.0	0.564	1.404	0.047	+H₂O -OH +SiO	EVOLVED
36	21 00 21.4	-36 55 9.9	6.2287	-40.7965	G6.229-40.796	20571-3706	Spectra	86.2 GHz;		-12.0	0.12	0.247	0.027	+OH +SiO	EVOLVED
37	21 10 7.2	-38 31 3.2	4.3009	-42.8502	G4.301-42.850	21069-3843	Spectra	86.2 GHz;		-23.3	0.877	0.989	0.049	-H₂O -OH +SiO	EVOLVED
38	22 26 05	-48 26 20.2	345.8850	-54.7658	G345.885-54.766	22230-4841	Spectra	86.2 GHz;		-28.9	0.399	0.558	0.047	+SiO	EVOLVED

Non-detection table from Deguchi et al. (2001)