2005A&A...434..201H

Query : 2005A&A...434..201H

2005A&A...434..201H - Astronomy and Astrophysics, volume 434, 201-211 (2005/4-4)

Search for radiative pumping lines of OH masers. I. The 34.6 µm absorption line towards 1612MHz OH maser sources.

HE J.H., SZCZERBA R., CHEN P.S. and SOBOLEV A.M.

Abstract (from CDS):

The 1612 MHz hydroxyl maser in circumstellar envelopes has long been thought to be pumped by 34.6µm photons. Only recently, the Infrared Space Observatory has made possible spectroscopic observations which enable the direct confirmation of this pumping mechanism in a few cases. To look for the presence of this pumping line, we have searched the Infrared Space Observatory Data Archive and found 178 spectra with data around 34.6µm for 87 galactic 1612MHz masers. The analysis performed showed that the noise level and the spectral resolution of the spectra are the most important factors affecting the detection of the 34.6µm absorption line. Only 5 objects from the sample (3 red supergiants and 2 galactic center sources) are found to show clear 34.6µm absorption (all of them already known) while two additional objects only tentatively show this line. The 3 supergiants show similar pump rates and their masers might be purely radiatively pumped. The pump rates of OH masers in late type stars are found to be about 0.05, only 1/5 of the theoretical value of 0.25 derived by Elitzur (1992, Astronomical Masers (Kluwer Academic Publishers)). We have also found 16 maser sources which, according to the analysis assuming Elitzur's pump rate, should show the 34.6µm absorption line but do not. These non-detections can be tentatively explained by far-infrared photon pumping, clumpy nature of the OH masing region or a limb-filling emission effect in the OH shell.

Abstract Copyright: ∼

Journal keyword(s): masers - stars: AGB and post AGB - stars: circumstellar matter - radio lines: stars

VizieR on-line data: <Available at CDS (J/A+A/434/201): table1.dat table1a.dat refs.dat>

Simbad objects: 149

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Number of rows : 149
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3336 2
2 IRC +10011 OH* 01 06 25.9879717848 +12 35 52.896392052   20.7   18.26 14.01 M8 420 0
3 OH 127.8-00.0 OH* 01 33 51.21048 +62 26 53.2032           O-rich 181 0
4 ZW III 35 Sy2 01 44 30.516 +17 06 09.18   15.24 14.81     ~ 249 0
5 V* S Per s*r 02 22 51.7113133056 +58 35 11.422774248 13.22 10.55 7.90     M4.5-7Iae 376 0
6 V* IK Tau OH* 03 53 28.8924743304 +11 24 21.895183368 16.99 14.463 16.171 14.101   M7-11 638 0
7 IRAS 04361+2547 Y*O 04 39 13.89288 +25 53 20.8788           ~ 196 1
8 IRC +50137 OH* 05 11 19.4506093584 +52 52 33.235824324           M10 174 0
9 V* V1187 Ori C* 05 39 42.6258029448 -08 09 08.616635532     12 10.18   C 38 0
10 RAFGL 5163 Y*O 05 40 27.45024 -07 27 30.0564           ~ 141 1
11 ZOAG G184.95-00.85 SFR 05 53 42.717 +24 14 54.01           ~ 39 0
12 IRAS 05506+2414 Y*O 05 53 43.5659728656 +24 14 44.663981208           G9-K2 44 0
13 NAME Mon R2 HII 06 07 47.58 -06 22 42.6           ~ 742 2
14 RAFGL 940 C* 06 26 37.2725351496 +09 02 15.215521632         14.751 C 31 0
15 PN Vo 1 PN 06 59 26.4167860656 -79 38 47.118534828           [WC10] 100 0
16 V* VY CMa s*r 07 22 58.3261352189 -25 46 03.194390594 12.01 10.068 8.691 7.938   M5Iae 1103 0
17 MR 22 PN 10 21 33.85920 -58 05 47.6628           A2Ie 101 0
18 V* R Crt AB* 11 00 33.8525664720 -18 19 29.582708520   10.33 9.80     M7/8III 211 0
19 IRAS 13517-6515 OH* 13 55 30.2255857876 -65 30 32.769653190         15.552 O-rich 9 0
20 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2961 4
21 IRAS 15452-5459 pA* 15 49 11.3344710672 -55 08 51.846940176           O-rich 31 0
22 WRAY 16-198 PN 15 59 57.6368189878 -55 55 33.002692934           [WC9] 134 1
23 V* U Her OH* 16 25 47.4719383584 +18 53 32.863368084 8.85 8.23 6.70     M6.5-8+e 541 1
24 NGC 6153 PN 16 31 30.5708444544 -40 15 12.646208700   10.7 15.55     ~ 303 0
25 IRAS 16279-4757 pA* 16 31 38.7381067320 -48 04 05.637444456           M3II 41 0
26 IRAS 16342-3814 pA* 16 37 39.8691983808 -38 20 17.443998996           ~ 136 0
27 IRAS 16527-4001 OH* 16 56 09.88776 -40 06 21.4164           O-rich 6 0
28 OH 344.93+00.01 OH* 17 03 56.15664 -41 23 58.3008           O-rich 35 0
29 IRAS 17010-3840 OH* 17 04 28.24056 -38 44 21.9192           O-rich 17 0
30 IRAS 17043-4009 OH* 17 07 48.59280 -40 13 51.6792           O-rich 5 0
31 IRAS 17089-3814 OH* 17 12 21.20832 -38 18 20.4588           O-rich 11 1
32 NGC 6302 PN 17 13 44.5 -37 06 11           O-rich 795 1
33 RAFGL 6815S pA* 17 18 19.8040606320 -32 27 21.547417932           G2I 148 0
34 IRAS 17319-6234 OH* 17 36 37.76808 -62 35 55.5144           O-rich 24 1
35 IRAS 17347-3139 PN 17 38 00.61 -31 40 55.2           ~ 59 1
36 RAFGL 1992 OH* 17 39 14.93424 -30 14 24.3204           O-rich 54 1
37 IRC -30316 OH* 17 42 35.0228307552 -30 05 41.846248248     15     M4 37 0
38 RAFGL 5379 OH* 17 44 24.0074369832 -31 55 35.414175828           O-rich 88 0
39 OH 001.33+01.01 OH* 17 44 58.73040 -27 14 42.8316           O-rich 33 0
40 RAFGL 2003 IR 17 45 39.1 -29 00 23           ~ 22 0
41 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4388 3
42 OH 359.946-00.047 OH* 17 45 40.63 -29 00 23.5           O-rich 62 0
43 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 525 0
44 IRAS 17431-2846 IR 17 46 17.9 -28 48 01           ~ 10 0
45 OH 000.66-00.03 Mas 17 47 20.12 -28 23 06.2           ~ 60 1
46 IRAS 17441-2822 HII 17 47 20.224 -28 23 04.13           ~ 28 0
47 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2265 1
48 IRAS 17443-2949 PN 17 47 35.32488 -29 50 53.3940           O-rich 32 0
49 [KC97c] G000.6-00.6 HII 17 49 25.5 -28 46 19           ~ 16 1
50 [RHI84] 10-739 LP? 17 49 29.0615579184 -28 46 08.760631548     14.90 13.924   M6.5 6 1
51 Hen 2-289 Sy* 17 49 48.2107694784 -37 01 27.797630520       13.828   M4/5:e 162 0
52 RAFGL 2019 OH* 17 53 18.8416434624 -26 56 37.489065396           M8-9 76 0
53 IRAS 17516-2525 pA* 17 54 43.3459663104 -25 26 28.127732028           O-B? 38 1
54 V* AU Her OH* 17 57 19.7195747184 +29 46 28.709941296       12.03   M8 32 0
55 IRAS 17562-1945 OH* 17 59 12.09624 -19 45 21.5316           O-rich 6 0
56 RAFGL 2046 HII 18 00 32.1 -24 04 03           ~ 361 0
57 IRAS 17594-2201 OH* 18 02 25.37160 -22 01 00.7392           O-rich 7 0
58 IRAS 18042-2517 OH* 18 07 20.6175382872 -25 17 19.021261128           O-rich 8 0
59 V* VX Sgr s*r 18 08 04.0442790744 -22 13 26.600899044 11.72 9.41 6.52 3.90 2.11 M8.5Ia 596 0
60 HD 335675 pA* 18 11 30.6621530616 +27 05 15.637762608   11.52 10.55     F3Ib 115 0
61 OH 012.3-00.2 OH* 18 13 08.7335140800 -18 27 49.341992184           O-rich 24 0
62 IRAS 18104-1553 Mi* 18 13 18.5621319145 -15 52 27.041375025         14.443 O-rich 6 0
63 V* V2053 Oph pA* 18 14 49.3841392968 +05 12 55.714343112   11.75 10.28     C 46 0
64 IRAS 18123-2044 OH* 18 15 21.31080 -20 43 32.0052           O-rich 5 0
65 OH 012.8-00.9 OH* 18 16 49.21368 -18 15 01.6560           O-rich 50 0
66 IRAS 18158-1223 OH* 18 18 38.3108754819 -12 22 37.159157171           O-rich 4 0
67 IRAS 18163-1426 OH* 18 19 08.5691912736 -14 25 02.182353312         15.942 O-rich 8 0
68 IRAS 18171-0949 OH* 18 19 56.1396572904 -09 47 40.528356216         17.048 O-rich 8 0
69 IRAS 18173-1642 OH* 18 20 16.0042911768 -16 41 03.748204428           O-rich 6 0
70 RAFGL 2136 Y*O 18 22 26.52888 -13 30 14.0400           ~ 285 0
71 IRAS 18195-1922 OH* 18 22 32.8201629456 -19 20 35.152494504         15.035 O-rich 7 0
72 IRAS 18210-1825 OH* 18 24 01.5192197304 -18 23 25.137285756           O-rich 8 0
73 IRAS 18219-0725 OH* 18 24 41.42976 -07 24 08.1900           O-rich 6 0
74 IRAS 18236-1422 OH* 18 26 32.3187264432 -14 20 30.416295480         16.275 O-rich 7 0
75 IRAS 18245-1300 OH* 18 27 23.65080 -12 59 02.2992           O-rich 6 0
76 OH 021.5+00.5 OH* 18 28 30.93720 -09 58 14.3184           O-rich 93 0
77 V* V370 Ser Or* 18 29 49.24584 +01 16 31.5480           ~ 31 0
78 OH 017.7-02.0 pA* 18 30 30.703 -14 28 57.04           O-rich 141 1
79 IRAS 18286-0959 pA* 18 31 22.94232 -09 57 21.3948           O-rich 39 0
80 OH 020.8-00.8 OH* 18 31 23.1448168272 -11 09 54.660714624           O-rich 7 0
81 IRAS 18307-0956 OH* 18 33 27.7399478352 -09 54 21.549012624           O-rich 5 0
82 OH 024.0-00.2 OH* 18 35 34.54824 -08 02 40.2000           O-rich 9 0
83 IRAS 18340-0446 OH* 18 36 41.5764439728 -04 43 24.421582812           O-rich 6 0
84 IRAS 18340-0648 OH* 18 36 42.04008 -06 45 54.9612           O-rich 7 0
85 IRAS 18341-0751 OH* 18 36 51.07872 -07 49 02.8128           O-rich 4 0
86 IRC +10365 OH* 18 37 19.2583829328 +10 25 42.492195300       9.97   M9 149 0
87 OH 026.5+00.6 OH* 18 37 32.50920 -05 23 59.1936           O-rich 301 1
88 IRAS 18364-0710 OH* 18 39 12.13560 -07 07 38.8416           O-rich 5 0
89 IRAS 18367-0634 OH* 18 39 24.37032 -06 31 49.9008           O-rich 4 0
90 IRAS 18383-0634 OH* 18 41 00.8547775272 -06 32 02.135221620           O-rich 4 0
91 OH 026.2-00.6 OH* 18 41 14.33376 -06 15 00.6012           O-rich 59 0
92 IRAS 18399-0149 OH* 18 42 31.8793573152 -01 46 31.811047068         12.331 O-rich 9 0
93 IRAS 18399-0509 OH* 18 42 38.54232 -05 06 00.1620           O-rich 5 0
94 IRAS 18402-0458 OH* 18 42 53.24736 -04 55 24.9132           O-rich 6 0
95 IRAS 18407-0619 OH* 18 43 23.2772316720 -06 16 26.608932228           O-rich 7 0
96 IRAS 18417-0103 OH* 18 44 16.7226961992 -01 00 25.889246676         14.568 O-rich 10 0
97 IRAS 18422-0116 OH* 18 44 49.9150698456 -01 13 23.994800976           O-rich 5 0
98 IRAS 18422-0437 OH* 18 44 56.3618689632 -04 33 58.965329088           O-rich 8 0
99 IRAS 18423-0135 OH* 18 44 56.43504 -01 32 44.8440           O-rich 4 0
100 IRAS 18434-0202 OH* 18 46 05.80992 -01 59 17.4732           O-rich 10 0
101 OH 032.1+00.9 OH* 18 46 38.75736 -00 17 13.1136           O-rich 17 0
102 OH 030.9+00.2 OH* 18 46 58.90560 -01 43 42.8016           O-rich 8 0
103 OH 027.8-01.5 OH* 18 47 37.7280672432 -05 11 08.287197252           O-rich 19 0
104 IRAS 18451-0824 OH* 18 47 54.5553981600 -08 21 28.884972600         12.606 O-rich 11 0
105 OH 030.1-00.7 OH* 18 48 41.98728 -02 50 29.5080           O-rich 100 0
106 OH 032.0-00.5 OH* 18 51 26.25600 -01 03 52.3620           O-rich 68 0
107 IRAS 18489-0122 OH* 18 51 33.75960 -01 18 21.1500           O-rich 4 0
108 OH 032.8-00.3 OH* 18 52 22.25472 -00 14 11.8428           O-rich 123 0
109 IRAS 18503-0141 OH* 18 52 57.17544 -01 38 06.5688           O-rich 6 0
110 IRAS 18509-0018 OH* 18 53 30.08328 -00 14 27.0996           O-rich 7 0
111 OH 035.6-00.3 OH* 18 57 27.47184 +02 12 16.9740           O-rich 48 0
112 RAFGL 2287 mul 18 57 36.5 +03 27 24           ~ 24 0
113 IRAS 18556+0811 OH* 18 58 04.2306358248 +08 15 30.678343632           ~ 28 0
114 RAFGL 2290 OH* 18 58 30.0951077544 +06 42 57.696212124           O-rich 126 0
115 IRAS 18595-0053 OH* 19 02 05.0797747944 -00 49 38.510929812           O-rich 5 0
116 OH 037.1-00.8 OH* 19 02 06.28560 +03 20 15.9900           O-rich 74 0
117 OH 035.2-02.6 pA* 19 05 02.0381133528 +00 48 50.467761000         14.36 G0-5 46 0
118 V* R Aql OH* 19 06 22.2510922392 +08 13 48.012661776 8.06 7.69 6.09     M6.5-9e 564 2
119 OH 043.6-00.5 OH* 19 12 47.0029148112 +09 18 24.410084976         16.399 O-rich 10 0
120 HD 179821 pA* 19 13 58.6082398776 +00 07 31.935181836 10.81 9.694 8.19     G4_0-Ia 239 0
121 OH 044.8-02.3 OH* 19 21 36.6364189224 +09 27 56.688388992           O-rich 88 0
122 PN Vy 2-2 PN 19 24 22.2390166933 +09 53 56.259102426   14.02 12.65 13.38   O-rich 261 0
123 IRC +10420 pA* 19 26 48.0979492536 +11 21 16.758531216   13.98 11.66     F8Ia+e 477 0
124 PN K 3-35 PN 19 27 43.9749997920 +21 30 02.907990216           O-rich 149 0
125 OH 055.0+00.7 OH* 19 30 29.47536 +19 50 41.0352           O-rich 49 0
126 HD 184738 PN 19 34 45.2337620448 +30 30 58.950651240   10.41 10.44     [WC9] 952 0
127 Min 1-92 pA* 19 36 18.9295687968 +29 32 49.785288144 12.13 12.35 11.75 11.54   B0.5IV[e] 254 0
128 V* RR Aql Mi* 19 57 36.0616870728 -01 53 11.339520360     7.80 7.45   M7.5e 294 2
129 V* Z Cyg Mi* 20 01 27.5075704056 +50 02 32.634937212   11.12 7.10 8.79   M5.5-6.5e 162 0
130 RAFGL 4259 OH* 20 06 22.73784 +27 02 10.6332           O-rich 39 0
131 IRC -10529 OH* 20 10 27.8731455576 -06 16 13.758742596         15.49 M: 141 0
132 [VV2000] J201329.8-414735 QSO 20 13 29.509 -41 47 35.48   17.0       ~ 129 2
133 WSRTGP 2025+3712 HII 20 27 26.4 +37 22 48           ~ 48 0
134 NAME SH 2-106 IR Y*O 20 27 26.502 +37 22 42.03           ~ 163 1
135 OH 075.3-01.8 OH* 20 29 08.58696 +35 45 43.4916           O-rich 40 0
136 MSB 38 C* 20 36 07.3864144104 +60 05 26.039264496   13.98 9.86 10.3   C-J4+ 122 0
137 IRAS 20406+2953 OH* 20 42 45.9542443488 +30 04 06.480845940           O-rich 31 1
138 NML Cyg s*r 20 46 25.5392819088 +40 06 59.464289232           M7/8 508 0
139 V* UX Cyg OH* 20 55 05.5117404456 +30 24 52.015482108       10.404   M6-6.5e 163 0
140 V* NU Del OH* 21 02 06.9754003200 +18 10 38.818167636   13.5       M9 16 0
141 IRAS 21554+6204 OH* 21 56 58.19496 +62 18 46.0152           O-rich 42 0
142 IRAS 22036+5306 pA* 22 05 30.28608 +53 21 32.7888           F4III 78 0
143 SH 2-140 OpC 22 19 07.8 +63 17 07           ~ 658 2
144 IRAS 22176+6303 Y*O 22 19 18.23 +63 18 47.5           ~ 595 0
145 RAFGL 2885 OH* 22 19 27.47784 +59 51 21.7080           O-rich 136 0
146 EM* AS 501 LP* 22 57 40.9715428128 +58 49 12.529058124   15.258 12.516 11.201   M2II-III 113 0
147 V* R Peg Mi* 23 06 39.1661885712 +10 32 36.080828808 9.43 9.07 7.79 4.87 2.35 M6-8.5e 224 0
148 V* R Aqr Sy* 23 43 49.4634303216 -15 17 04.176349872   8.823 7.683 9.37   M6.5-8.5e 784 0
149 V* PZ Cas s*r 23 44 03.2814215136 +61 47 22.190200476 12.80 11.48 8.90 6.08 3.90 M3Ia 202 0

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