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• Target type: star
  

• Abstract

  Using the 3.6, 4.5, 5.8, and 8.0 mum images with 1.2 arcsec pixel resolution of the Spitzer/GLIMPSE survey, we investigated 23 masing and 18 very red objects, which are extremely faint in the near-infrared bands. We found the counterparts for all of the selected objects on the GLIMPSE images. Color indices in these IR bands suggest the presence of a high-extinction layer of more than a few tenths of a solar mass in front of the central star. Furthermore, radio observations in the SiO and H2O maser lines found characteristic maser-line spectra of the embedded objects, e.g., the SiO J=1-0 line intensity in the v=2 state is stronger than that of the v=1 state, or very widespread H2O maser emission spectra. These facts indicate that these objects are really enshrouded by very thick circumstellar matter, some of which cannot be ascribed to the AGB wind of the central star. Individually interesting objects are discussed, including two newly found water fountains and an SiO source accompanying a nebulosity.

  Target sources: IRAS

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  Input tables: Table 1, 3 and 4
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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Spectra	Line	Vpeak	Ta	Telescope	RMS	Detection	Class	Dist. (parallax)
	(J2000)	(J2000)	(deg.)	(deg.)				SiO	(km/s)	(K)		(Jy)	Yes/No		(kpc)
1	18 13 3.1	-19 14 19	11.5216	-0.5824	G11.522-0.582	18100-1915	Spectra	SiO J=1-0 v=2;	16.5	1.202	NRO	0.114	-H2O +OH +SiO	EVOLVED
2	18 21 07	-15 03 22	16.1172	-0.2908	G16.117-0.291	18182-1504	Spectra	29SiO J=1-0 v=1;	23.6	1.093	NRO	0.151	+H2O -CH3OH I +CH3OH II +OH +SiO	SFR_MIXED
3	18 21 07	-15 03 22	16.1172	-0.2908	G16.117-0.291	18182-1504	Spectra	SiO J=1-0 v=0;	18.3	0.65	NRO	0.153	+H2O -CH3OH I +CH3OH II +OH +SiO	SFR_MIXED
4	18 21 07	-15 03 22	16.1172	-0.2908	G16.117-0.291	18182-1504	Spectra	SiO J=1-0 v=1;	22.9	16.661	NRO	0.166	+H2O -CH3OH I +CH3OH II +OH +SiO	SFR_MIXED
5	18 21 07	-15 03 22	16.1172	-0.2908	G16.117-0.291	18182-1504	Spectra	SiO J=1-0 v=2;	22.5	41.5	NRO	0.168	+H2O -CH3OH I +CH3OH II +OH +SiO	SFR_MIXED
6	18 21 07	-15 03 22	16.1172	-0.2908	G16.117-0.291	18182-1504	Spectra	SiO J=1-0 v=3;	22.5	10.434	NRO	0.173	+H2O -CH3OH I +CH3OH II +OH +SiO	SFR_MIXED
7	18 22 43.1	-12 47 42	18.2956	0.4291	G18.296+0.429	18198-1249	Spectra	SiO J=1-0 v=2;	48.2	0.579	NRO	0.107	-H2O +OH +SiO	EVOLVED
8	18 26 50.6	-10 08 19	21.1164	0.7775	G21.117+0.777	18241-1010	Spectra	SiO J=1-0 v=2;	116.3	0.62	NRO	0.085	+OH +SiO	EVOLVED
9	18 28 31	-09 58 15	21.4566	0.4909	G21.457+0.491	18257-1000	Spectra	SiO J=1-0 v=2;	114.9	0.781	NRO	0.097	+H2O +OH +SiO	EVOLVED
10	18 43 25.8	-03 55 55	28.5204	-0.0143	G28.520-0.014	18407-0358	Spectra	SiO J=1-0 v=1;	106.5	0.572	NRO	0.108	-H2O +OH +SiO	SFR_MIXED
11	18 43 25.8	-03 55 55	28.5204	-0.0143	G28.520-0.014	18407-0358	Spectra	SiO J=1-0 v=2;	107.3	0.921	NRO	0.097	-H2O +OH +SiO	SFR_MIXED
12	18 23 35	-13 55 49	17.3915	-0.2891	G17.391-0.289	G017.3913	Spectra	SiO J=1-0 v=2;	28.7	1.398	NRO	0.117	+OH +SiO	EVOLVED
13	18 35 57.5	-07 18 58	24.6607	0.0866	G24.661+0.087	G024.6610	Spectra	SiO J=1-0 v=2;	57.7	1.247	NRO	0.101	+OH +SiO	EVOLVED

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Line	Date	End date	Telescope	RMS	Detection	Class
	(J2000)	(J2000)	(deg.)	(deg.)			SiO				(Jy)	Yes/No
1	18 13 3.1	-19 14 19	11.5216	-0.5824	G11.522-0.582	18100-1915	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.121	-H2O +OH +SiO	EVOLVED
2	18 22 43.1	-12 47 42	18.2956	0.4291	G18.296+0.429	18198-1249	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.104	-H2O +OH +SiO	EVOLVED
3	18 26 50.6	-10 08 19	21.1164	0.7775	G21.117+0.777	18241-1010	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.084	+OH +SiO	EVOLVED
4	18 28 31	-09 58 15	21.4566	0.4909	G21.457+0.491	18257-1000	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.097	+H2O +OH +SiO	EVOLVED
5	18 31 22.9	-09 57 20	21.7971	-0.1271	G21.797-0.127	18286-0959	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.123	+H2O +OH -SiO	SFR_MIXED
6	18 31 22.9	-09 57 20	21.7971	-0.1271	G21.797-0.127	18286-0959	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.118	+H2O +OH -SiO	SFR_MIXED
7	18 31 22.9	-09 57 20	21.7971	-0.1271	G21.797-0.127	18286-0959	SiO J=2-1 v=1;	2006-04-10	2006-04-23	NRO	0.065	+H2O +OH -SiO	SFR_MIXED
8	18 48 43	-01 48 30	31.0124	-0.2193	G31.012-0.219	18460-0151	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.100	+H2O -CH3OH II +OH -SiO	SFR_MIXED
9	18 48 43	-01 48 30	31.0124	-0.2193	G31.012-0.219	18460-0151	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.084	+H2O -CH3OH II +OH -SiO	SFR_MIXED
10	18 48 43	-01 48 30	31.0124	-0.2193	G31.012-0.219	18460-0151	SiO J=2-1 v=1;	2006-04-10	2006-04-23	NRO	0.069	+H2O -CH3OH II +OH -SiO	SFR_MIXED
11	18 23 35	-13 55 49	17.3915	-0.2891	G17.391-0.289	G017.3913	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.119	+OH +SiO	EVOLVED
12	18 35 57.5	-07 18 58	24.6607	0.0866	G24.661+0.087	G024.6610	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.103	+OH +SiO	EVOLVED
13	18 06 25.3	-18 57 44	11.0061	0.9222	G11.006+0.922	18034-1858	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.115	-H2O -SiO	EVOLVED
14	18 06 25.3	-18 57 44	11.0061	0.9222	G11.006+0.922	18034-1858	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.114	-H2O -SiO	EVOLVED
15	18 19 1.7	-17 12 07	13.9885	-0.8610	G13.988-0.861	18161-1713	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.119	-H2O -OH -SiO	EVOLVED
16	18 19 1.7	-17 12 07	13.9885	-0.8610	G13.988-0.861	18161-1713	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.115	-H2O -OH -SiO	EVOLVED
17	18 24 5.3	-12 26 12	18.7688	0.3018	G18.769+0.302	18212-1227	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.096	-H2O -CH3OH II +OH -SiO	EVOLVED
18	18 24 5.3	-12 26 12	18.7688	0.3018	G18.769+0.302	18212-1227	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.095	-H2O -CH3OH II +OH -SiO	EVOLVED
19	18 32 37	-09 02 30	22.7483	0.0252	G22.749+0.025	18298-0904	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.097	-H2O -CH3OH II -SiO	EVOLVED
20	18 32 37	-09 02 30	22.7483	0.0252	G22.749+0.025	18298-0904	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.105	-H2O -CH3OH II -SiO	EVOLVED
21	18 35 19.1	-07 19 23	24.5815	0.2243	G24.581+0.224	18325-0721	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.075	-H2O +OH -SiO	EVOLVED
22	18 35 19.1	-07 19 23	24.5815	0.2243	G24.581+0.224	18325-0721	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.073	-H2O +OH -SiO	EVOLVED
23	18 35 24.3	-06 42 59	25.1301	0.4844	G25.130+0.484	18327-0645	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.099	-H2O -SiO	EVOLVED
24	18 35 24.3	-06 42 59	25.1301	0.4844	G25.130+0.484	18327-0645	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.097	-H2O -SiO	EVOLVED
25	18 45 4.9	-05 06 28	27.6624	-0.9176	G27.662-0.916	18424-0509	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.357	-H2O -SiO	EVOLVED
26	18 45 4.9	-05 06 28	27.6624	-0.9176	G27.662-0.916	18424-0509	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.396	-H2O -SiO	EVOLVED
27	18 47 5.2	-03 56 21	28.9304	-0.8290	G28.930-0.829	18444-0359	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.126	-H2O -SiO	EVOLVED
28	18 47 5.2	-03 56 21	28.9304	-0.8290	G28.930-0.829	18444-0359	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.121	-H2O -SiO	EVOLVED
29	19 02 6.3	+03 20 16	37.1185	-0.8474	G37.118-0.847	18596+0315	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.117	+H2O -CH3OH I -CH3OH II +OH +SiO	EVOLVED
30	19 02 6.3	+03 20 16	37.1185	-0.8474	G37.118-0.847	18596+0315	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.115	+H2O -CH3OH I -CH3OH II +OH +SiO	EVOLVED
31	19 03 33.1	+06 42 29	40.2795	0.3762	G40.279+0.376	19011+0638	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.113	-H2O -CH3OH II -OH -SiO	EVOLVED
32	19 03 33.1	+06 42 29	40.2795	0.3762	G40.279+0.376	19011+0638	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.102	-H2O -CH3OH II -OH -SiO	EVOLVED
33	19 04 59	+07 06 40	40.8006	0.2453	G40.802+0.243	19025+0702	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.111	-OH -SiO	EVOLVED
34	19 04 59	+07 06 40	40.8006	0.2453	G40.802+0.243	19025+0702	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.113	-OH -SiO	EVOLVED
35	19 11 10	+10 11 37	44.2405	0.3087	G44.241+0.309	19087+1006	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.077	-H2O -CH3OH II -OH -SiO	SFR
36	19 11 10	+10 11 37	44.2405	0.3087	G44.241+0.309	19087+1006	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.075	-H2O -CH3OH II -OH -SiO	SFR
37	19 13 37.4	+12 25 39	46.4994	0.8094	G46.495+0.812	19112+1220	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.088	-H2O -CH3OH II +OH -SiO	EVOLVED
38	19 13 37.4	+12 25 39	46.4994	0.8094	G46.495+0.812	19112+1220	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.084	-H2O -CH3OH II +OH -SiO	EVOLVED
39	19 13 49.4	+09 25 51	43.8677	-0.6247	G43.868-0.625	19114+0920	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.086	-H2O -OH -SiO	EVOLVED
40	19 13 49.4	+09 25 51	43.8677	-0.6247	G43.868-0.625	19114+0920	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.086	-H2O -OH -SiO	EVOLVED
41	19 20 22	+12 36 24	47.4259	-0.5626	G47.426-0.563	19180+1230	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.071	-OH -SiO	EVOLVED
42	19 20 22	+12 36 24	47.4259	-0.5626	G47.426-0.563	19180+1230	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.073	-OH -SiO	EVOLVED
43	19 27 41.1	+17 30 36	52.5813	0.2014	G52.581+0.201	19254+1724	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.094	-CH3OH II -OH -SiO	EVOLVED
44	19 27 41.1	+17 30 36	52.5813	0.2014	G52.581+0.201	19254+1724	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.082	-CH3OH II -OH -SiO	EVOLVED
45	19 28 53.1	+18 21 23	53.4613	0.3550	G53.461+0.355	19266+1815	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.077	-SiO	EVOLVED
46	19 28 53.1	+18 21 23	53.4613	0.3550	G53.461+0.355	19266+1815	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.071	-SiO	EVOLVED
47	19 29 46.5	+17 09 01	52.5040	-0.4087	G52.504-0.409	19275+1702	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.094	-H2O -SiO	EVOLVED
48	19 29 46.5	+17 09 01	52.5040	-0.4087	G52.504-0.409	19275+1702	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.090	-H2O -SiO	EVOLVED
49	18 17 01	-16 37 00	14.2758	-0.1599	G14.276-0.160	G0142758	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.109	-H2O -SiO	EVOLVED
50	18 17 01	-16 37 00	14.2758	-0.1599	G14.276-0.160	G0142758	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.109	-H2O -SiO	EVOLVED
51	18 33 34.6	-09 57 36	22.0428	-0.6086	G22.043-0.608	G0220425	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.075	-H2O -CH3OH II +OH -SiO	EVOLVED
52	18 33 34.6	-09 57 36	22.0428	-0.6086	G22.043-0.608	G0220425	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.078	-H2O -CH3OH II +OH -SiO	EVOLVED
53	18 42 30.9	-04 34 35	27.8429	-0.1060	G27.843-0.106	G0278433	SiO J=1-0 v=1;	2006-04-10	2006-04-23	NRO	0.103	-H2O -SiO	UNK
54	18 42 30.9	-04 34 35	27.8429	-0.1060	G27.843-0.106	G0278433	SiO J=1-0 v=2;	2006-04-10	2006-04-23	NRO	0.099	-H2O -SiO	UNK

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