2023ApJS..268...56Z

Query : 2023ApJS..268...56Z

2023ApJS..268...56Z - Astrophys. J., Suppl. Ser., 268, 56 (2023/October-0)

A Systematic Observational Study on Galactic Interstellar Ratio 18O/17O. II. C18O and C17O J = 2-1 Data Analysis.

ZOU Y.P., ZHANG J.S., HENKEL C., ROMANO D., LIU W., ZHENG Y.H., YAN Y.T., CHEN J.L., WANG Y.X. and ZHAO J.Y.

Abstract (from CDS):

To investigate the relative amount of ejecta from high-mass versus intermediate-mass stars and to trace the chemical evolution of the Galaxy, we have performed a systematic study of Galactic interstellar 18O/17O ratios toward a sample of 421 molecular clouds with IRAM 30 m and the 10 m Submillimeter Telescope, covering a galactocentric distance range of ∼1-22 kpc. The results presented in this paper are based on the J = 2-1 transition and encompass 364 sources showing both C18O and C17O detections. The previously suggested 18O/17O gradient is confirmed. For the 41 sources detected with both facilities, good agreement is obtained. A correlation of the 18O/17O ratios with heliocentric distance is not found, indicating that beam dilution and linear beam sizes are not relevant. For the subsample of IRAM 30 m high-mass star-forming regions with accurate parallax distances, an unweighted fit gives 18O/17O = (0.12 ± 0.02)RGC + (2.38 ± 0.13) with a correlation coefficient of R = 0.67. While the slope is consistent with our J = 1-0 measurement, the ratios are systematically lower. This should be caused by larger optical depths of C18O 2-1 lines with respect to the corresponding 1-0 transitions, which is supported by RADEX calculations and the fact that C18O/C17O is positively correlated with 13CO/C18O. When we consider that optical depth effects with C18O J = 2-1 typically reach an optical depth of ∼0.5, the corrected 18O/17O ratios from the J = 1-0 and J = 2-1 lines are consistent. A good numerical fit to the data is provided by the MWG-12 model, which includes both rotating stars and novae.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Interstellar molecules - Radio source counts - Isotopic abundances - Galaxy chemical evolution

VizieR on-line data: <Available at CDS (J/ApJS/268/56): table1.dat table2.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 247

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Number of rows : 247
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IRAS 00001+6417 Cld 00 02 41.3 +64 34 04           ~ 8 0
2 IRAS 00117+6412 HII 00 14 26.61 +64 28 30.3           ~ 40 0
3 SH 2-172 HII 00 15 29.1 +61 14 41           ~ 30 0
4 IRAS 00182+6223 LP* 00 20 56.7818222112 +62 40 20.949950892           ~ 9 0
5 IRAS 00185+6302 IR 00 21 19.4 +63 19 20           ~ 5 0
6 IRAS 00241+6453 IR 00 26 55.798 +65 10 27.81           ~ 10 0
7 IRAS 00307+6633 IR 00 33 42.0 +66 49 49           ~ 7 0
8 GM 1-33 HH 00 36 47.5 +63 29 02           ~ 124 0
9 V* NX Cas Y*O 00 38 59.3657735875 +59 27 47.791100439           ~ 19 0
10 IRAS 00412+6638 IR 00 44 15.344 +66 54 41.12           ~ 18 0
11 IRAS 00535+6532 IR 00 56 40.4 +65 48 58           ~ 5 0
12 IRAS 00554+6524 IR 00 58 39.0 +65 40 42           ~ 12 0
13 Ced 4a GNe 00 58 40.800 +61 04 40.25           ~ 17 0
14 IRAS 00560+6037 Cld 00 59 04.1 +60 53 32           ~ 17 0
15 RNO 4 IR 01 06 45.5 +59 40 29           ~ 12 0
16 IRAS 01037+6504 IR 01 06 59.7 +65 20 53           ~ 14 0
17 GAL 124.64+02.54 HII 01 07 50.70 +65 21 21.4           ~ 52 0
18 IRAS 01056+6217 * 01 08 50.2395774912 +62 33 20.045837484           ~ 8 0
19 IRAS 01059+6222 IR 01 09 05.1 +62 38 29           ~ 7 0
20 IRAS 01075+6318 MIR 01 10 48.27624 +63 34 14.3076           ~ 7 0
21 GAL 125.52+02.03 HII 01 15 41.59 +64 47 01.2           ~ 20 0
22 IRAS 01133+6434 Y*O 01 16 36.67827 +64 50 41.7300           ~ 39 0
23 IRAS 01160+6529 IR 01 19 26.5393580496 +65 45 45.024636924           ~ 29 0
24 IRAS 01309+6238 IR 01 34 19.6 +62 53 37           ~ 6 0
25 IRAS 01420+6401 HII 01 45 40.16013 +64 16 09.0770           ~ 32 1
26 2MASX J01581857+6334035 G 01 58 18.5897976936 +63 34 03.954581004           ~ 19 0
27 IRAS 02048+5957 Y*O 02 08 27.1488382728 +60 11 49.320885048           ~ 13 0
28 MWISP G131.858+01.342 MoC 02 10 52 +62 49.7           ~ 3 0
29 IRAS 02327+6019 IR 02 36 35.14 +60 32 03.1           ~ 11 0
30 IRAS 02333+5930 HII 02 37 05.7 +59 43 38           ~ 18 0
31 IRAS 02376+6030 IR 02 41 29.2954140912 +60 43 26.618330640           ~ 12 0
32 IRAS 02383+6241 HII 02 42 21.87840 +62 54 03.3160           ~ 32 1
33 RAFGL 5077 HII 02 43 28.62213 +62 57 08.7770           ~ 77 0
34 [KSP2003] J024715.43+603049.0 Y*O 02 47 15.43 +60 30 49.0           ~ 16 0
35 RAFGL 5085 Y*O 02 50 08.5608261912 +61 59 51.902005956           ~ 44 0
36 LEDA 2516652 G 02 50 18.0 +55 51 09           ~ 7 0
37 NAME SFO 12 IR Stellar Group Cl* 02 55 03.0 +60 35 45           ~ 23 0
38 NAME AFGL 4029 IRS 1 Y*O 03 01 29.2 +60 29 12           ~ 112 1
39 SH 2-201 HII 03 03 17.9 +60 27 52           ~ 118 0
40 HHL 5 HII 03 07 24.2 +58 30 45           ~ 152 0
41 EQ 0305+596 Y*O 03 09 46.3 +59 52 53           ~ 10 0
42 IRAS 03064+5638 HII 03 10 15.3 +56 50 18           ~ 28 0
43 IRAS 03080+5732 Y*O 03 11 52.5 +57 43 55           ~ 8 0
44 IRAS 03101+5821 HII 03 14 05 +58 33.1           ~ 22 0
45 IRAS 03107+5826 Y*O 03 14 41.4 +58 37 14           ~ 7 0
46 IRAS 03111+5938 LP* 03 15 11.0221403040 +59 49 10.591119228           ~ 12 0
47 2MASX J03172875+6032259 G 03 17 28.7557604880 +60 32 25.515551616           ~ 9 0
48 GAL 142.25+01.43 Y*O 03 27 31.405 +58 19 22.00           ~ 29 0
49 RAFGL 490 Or* 03 27 38.7928952784 +58 47 00.025298088           ~ 359 0
50 IRAS 03277+5957 * 03 31 54.7547853696 +60 07 51.306362076           ~ 4 0
51 IRAS 03331+6256 PN? 03 37 28.50096 +63 06 31.2912           ~ 10 0
52 LEDA 2797734 G 03 39 14.9 +55 59 33           ~ 21 0
53 CPM 9 Y*O 03 52 27.53 +57 48 33.1           ~ 19 0
54 IRAS 03506+5646 * 03 54 42.25800 +56 55 10.4844           ~ 6 0
55 IRAS 03534+5402 IR 03 57 19.64 +54 10 41.3           ~ 13 0
56 IRAS 03580+5417 IR 04 01 54.7 +54 25 44           ~ 5 0
57 2MASX J04041342+5122587 G 04 04 13.4464505640 +51 22 58.539784476           ~ 11 0
58 2MASX J04062549+5321492 G 04 06 25.4523305280 +53 21 49.323364236           ~ 16 0
59 IRAS 04155+5107 IR 04 19 20.6 +51 15 13           ~ 6 0
60 LBN 784 HII 05 13 25.5 +37 27 01           ~ 83 0
61 IRAS 05137+3919 Cld 05 17 13.3 +39 22 14           ~ 75 0
62 IRAS 05167+3858 IR 05 20 11.0 +39 01 20           ~ 7 0
63 IRAS 05184+3635 IR 05 21 51.3 +36 38 29           ~ 7 0
64 NGC 1985 RNe 05 37 47.8 +31 59 24           ~ 145 2
65 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
66 IRAS 06061+2151 SFR 06 09 07.8 +21 50 39           ~ 87 0
67 IRAS 06061+2028 IR 06 09 09.0 +20 27 39           ~ 11 0
68 LBN 196.79-03.15 HII 06 10 12.5179825916 +12 48 48.261812212   16.65 15.79     ~ 65 0
69 IRAS 06075+1643 IR 06 10 27.4 +16 43 19           ~ 7 0
70 IRAS 06084+1727 HII 06 11 24.5 +17 26 26           ~ 17 0
71 JCMTSF J061724.0+145444 Cl* 06 17 24.30 +14 54 37.2           ~ 31 0
72 GAL 195.82-00.21 HII 06 18 40.25 +15 05 14.2           ~ 19 0
73 IRAS 06166+1724 IR 06 19 32.6 +17 22 42           ~ 7 0
74 NGC 2247 RNe 06 33 04.4 +10 19 21   8.5       ~ 70 0
75 IRAS 06306+0437 MIR 06 33 16.212 +04 34 53.04           ~ 29 1
76 IRAS 06314+0427 IR 06 34 04.92 +04 25 00.1           ~ 25 1
77 IRAS 08140-3559 Y*? 08 15 57.12720 -36 08 06.8712           ~ 13 1
78 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
79 GAL 000.67-00.03 HII 17 47 20.5 -28 23 19           ~ 9 0
80 RAFGL 2046 HII 18 00 32.1 -24 04 03           ~ 380 0
81 GAL 009.62+00.19 HII 18 06 13.9 -20 31 44           ~ 226 0
82 W 31c HII 18 10 29.1 -19 56 05           ~ 357 0
83 OH 012.03-00.04 Y*O 18 12 01.8400 -18 31 55.800           ~ 91 0
84 W 33b SFR 18 13 54.68 -18 01 48.1           ~ 85 0
85 GAL 012.90-00.24 Mas 18 14 34.4366 -17 51 51.891           ~ 13 0
86 GAL 013.875+00.28 HII 18 14 35.2 -16 45 21           ~ 99 0
87 GAL 014.33-00.64 HII 18 18 53.5 -16 47 39           ~ 75 0
88 GAL 015.03-00.67 Mas 18 20 22.3 -16 11 18           ~ 15 0
89 GAL 023.44-00.18 HII 18 34 43.6 -08 32 25           ~ 58 0
90 GAL 024.78+00.08 HII 18 36.2 -07 13           ~ 89 0
91 GAL 028.86-00.07 HII 18 43 45.8 -03 35 30           ~ 30 0
92 Caswell OH 028.83-00.25 Mas 18 44 50.63 -03 46 03.8           ~ 29 0
93 GAL 029.98+00.10 Mas 18 45 41.1 -02 35 07           ~ 3 0
94 GAL 029.95-00.01 ? 18 46 01.46 -02 39 33.7           ~ 9 0
95 [KJB2003] G31.279+0.063 HII 18 48 11.94 -01 26 30.8           ~ 18 1
96 GAL 031.24-00.11 reg 18 48 45.39 -01 33 11.9           ~ 3 0
97 [KB94] 18 HII 18 50 30.6 -00 01 57           ~ 10 0
98 IRAS 18487-0015 IR 18 51 20.6 -00 11 46           ~ 23 0
99 RAFGL 2271 SFR 18 53 18.54 +01 14 57.9           ~ 537 0
100 IRAS 18517+0437 SFR 18 54 13.8 +04 41 32           ~ 89 0
101 GAL 035.20-01.74 Y*O 19 01 46.49 +01 13 24.7           ~ 78 1
102 IRAS 19110+1045 Y*O 19 13 22.0427 +10 50 53.336           ~ 132 0
103 CORNISH G045.4545+00.0591 HII 19 14 21.31 +11 09 11.7           ~ 157 1
104 GAL 043.89-00.78 HII 19 14 26.16 +09 22 34.0           ~ 53 0
105 GAL 048.99-00.29 HII 19 22 26.0 +14 07 08           ~ 13 0
106 [WBN74] W 51 IRS 2 SFR 19 23 39.93 +14 31 09.4           ~ 321 0
107 IRAS 19410+2336 SFR 19 43 11.5 +23 44 06           ~ 160 0
108 GAL 075.78+00.34 cor 20 21 44.00 +37 26 38.0           ~ 131 1
109 GAL 074.03-01.71 Mas 20 25 07.1053 +34 49 57.593           ~ 10 0
110 IRAS 20357+4703 IR 20 37 22.2 +47 13 53           ~ 9 0
111 GAL 081.87+00.78 Mas 20 38 36.9 +42 37 38           ~ 11 0
112 IRAS 20444+4629 MoC 20 45 59.64 +46 40 06.2           ~ 25 0
113 IRAS 20449+4634 IR 20 46 39.4 +46 45 42           ~ 5 0
114 IRAS 20505+4940 MIR 20 52 07.39032 +49 51 28.9980           ~ 7 0
115 IRAS 20567+4821 IR 20 58 23.0 +48 32 48           ~ 6 0
116 IRAS 20599+4843 IR 21 01 34.937 +48 55 01.03           ~ 16 0
117 IRAS 21003+4750 IR 21 02 01.9 +48 02 08           ~ 5 0
118 [BNM96] 090.778+2.828 HII 21 02 21.7906589880 +50 48 34.599786372           ~ 11 0
119 IRAS 21015+5918 IR 21 02 48.5 +59 30 48           ~ 8 0
120 IRAS 21022+5205 G 21 03 48.5 +52 17 42           ~ 7 0
121 EM* LkHA 324 Ae* 21 03 54.2279744856 +50 15 09.993001896   13.79 12.61 11.89 11.14 B9Ve 72 0
122 IRAS 21036+5107 HII 21 05 16.83384 +51 19 26.9652           ~ 6 0
123 IRAS 21076+5322 MIR 21 09 11.22048 +53 34 22.7640           ~ 6 0
124 IRAS 21078+5211 HII 21 09 31.03 +52 24 16.1           ~ 65 0
125 IRAS 21079+4745 IR 21 09 41.3 +47 58 07           ~ 4 0
126 IRAS 21080+4758 Y*O 21 09 45.87672 +48 10 58.9116           ~ 16 0
127 V* V459 Cyg cC* 21 10 54.3730781040 +49 08 31.400535876   11.76 10.54   8.845 F8 96 0
128 IRAS 21108+4603 IR 21 12 38.9 +46 16 15           ~ 4 0
129 IRAS 21114+4609 IR 21 13 15.8 +46 22 24           ~ 5 0
130 IRAS 21147+5246 IR 21 16 19.329 +52 58 57.14           ~ 4 0
131 IRAS 21156+5141 HII 21 17 14.7 +51 54 11           ~ 9 0
132 IRAS 21173+5450 IR 21 18 52.800 +55 03 22.63           ~ 9 0
133 IRAS 21202+5157 HII 21 21 53.577 +52 10 47.30           ~ 26 0
134 IRAS 21228+5332 IR 21 24 29.0 +53 45 34           ~ 13 0
135 IRAS 21230+5323 * 21 24 39.7268876616 +53 36 46.342298988           ~ 4 0
136 IRAS 21248+5331 IR 21 26 28.9 +53 44 11           ~ 9 0
137 IRAS 21260+5552 HII 21 27 32.39376 +56 05 11.3532           ~ 7 0
138 IRAS 21260+4938 IR 21 27 45.3 +49 51 51           ~ 6 0
139 2MASS J21314511+5115353 * 21 31 45.11 +51 15 35.3           ~ 10 0
140 IRAS 21303+5328 IR 21 32 00.0 +53 42 05           ~ 4 0
141 IRAS 21306+5532 IR 21 32 13.4 +55 46 08           ~ 9 0
142 IRAS 21307+5049 Y*O 21 32 30.59280 +51 02 16.0368           ~ 49 0
143 IRAS 21334+5039 Y*O 21 35 09.10944 +50 53 09.6072           ~ 44 0
144 PN K 4-45 Y*O 21 35 21.061 +53 47 11.21           ~ 57 2
145 IRAS 21351+5625 Ae* 21 36 46.047 +56 38 56.08   19.83     15.53 ~ 6 0
146 GAL 094.1-01.7 SR? 21 36 48.3 +49 56 38           ~ 6 0
147 NAME IC 1396 North CGb 21 40 42.6537 +58 16 01.882           ~ 193 1
148 IRAS 21410+5009 IR 21 42 52.5 +50 23 13           ~ 5 0
149 2MASS J21430143+5456183 Y*O 21 43 01.4400 +54 56 17.800           ~ 64 2
150 EM* LkHA 234 Ae* 21 43 06.8218113480 +66 06 54.202272804 13.65 13.61 12.73 11.98 11.20 B5Ve 295 0
151 IRAS 21418+5403 HII 21 43 30.000 +54 16 57.94           ~ 13 0
152 IRAS 21436+5657 IR 21 45 16.0 +57 10 58           ~ 6 0
153 IRAS 21445+5712 Or* 21 46 07.1269843296 +57 26 31.628449824           ~ 55 0
154 LDN 1118 DNe 21 46 36.8 +57 12 25           ~ 25 0
155 GLMP 1041 HII 21 49 38.5 +56 54 31           ~ 8 0
156 IRAS 21485+5645 MIR 21 50 12.51624 +56 59 24.2880           ~ 9 0
157 IRAS 21512+5625 Y*O 21 52 56.9 +56 39 53           ~ 20 0
158 IRAS 21519+5613 HII 21 53 38.8 +56 27 53           ~ 40 0
159 IRAS 21526+5728 HII 21 54 18.4 +57 42 51           ~ 23 0
160 DO 40433 LP? 21 56 15.0458906640 +57 50 41.727345029           ~ 8 0
161 IRAS 21547+5855 IR 21 56 20.7 +59 10 05           ~ 5 0
162 IRAS 21561+5806 IR 21 57 44.6 +58 21 06           ~ 17 0
163 IRAS 21569+5923 IR 21 58 34.4 +59 38 03           ~ 8 0
164 IRAS 22036+6034 MIR 22 05 14.85816 +60 48 40.0104           ~ 11 0
165 IRAS 22035+5435 IR 22 05 20.5 +54 49 43           ~ 5 0
166 IRAS 22087+5520 MIR 22 10 31.11840 +55 35 16.5912           ~ 5 0
167 IRAS 22103+5828 Y*O 22 12 01.7425903392 +58 42 56.141773560           ~ 17 0
168 IRAS 22134+5834 Y*O 22 15 09.08 +58 49 07.8           ~ 77 0
169 IRAS 22139+5201 MIR 22 15 49.11576 +52 15 54.5760           ~ 6 0
170 IRAS 22147+5948 MIR 22 16 29.32512 +60 03 31.0824           ~ 21 0
171 IRAS 22161+6140 Y*O 22 17 44.8947765960 +61 55 37.002277488           ~ 10 0
172 IRAS 22160+5551 Cld 22 17 51.7 +56 06 02           ~ 8 0
173 LBN 102.79-00.92 HII 22 19 09.0 +56 04 45           ~ 109 0
174 IRAS 22176+6303 Y*O 22 19 18.23 +63 18 47.5           ~ 600 0
175 SH 2-140 N HII 22 19 27.7 +63 32 56           ~ 31 0
176 IRAS 22187+5559 HII 22 20 35.0 +56 14 48           ~ 18 0
177 LDN 1204A HII 22 21 26.68 +63 51 38.2           ~ 120 0
178 IRAS 22246+5750 IR 22 26 29.2712501808 +58 05 39.946383492           ~ 8 0
179 IRAS 22267+6244 HII 22 28 29.3 +62 59 44           ~ 30 0
180 LDN 1206 DNe 22 28 52.2 +64 13 43           ~ 70 0
181 IRAS 22303+5738 MIR 22 32 16.09824 +57 54 22.3560           ~ 5 0
182 IRAS 22305+5803 Y*O 22 32 23.972 +58 18 57.91           ~ 39 0
183 SH 2-138 HII 22 32 45.7 +58 28 20           ~ 115 2
184 IRAS 22317+5816 IR 22 33 38.9088996888 +58 31 55.196195340           ~ 12 1
185 GLMP 1062 HII 22 35 00.7 +58 24 41           ~ 18 0
186 IRAS 22336+6855 MIR 22 35 08.35776 +69 10 41.2392           ~ 10 0
187 IRAS 22334+6525 MIR 22 35 08.70768 +65 41 33.4572           ~ 6 0
188 IRAS 22337+5827 MIR 22 35 38.05752 +58 43 04.2420           ~ 6 0
189 IRAS 22341+5805 * 22 36 01.79088 +58 20 39.0804           ~ 9 0
190 IRAS 22344+5909 MIR 22 36 20.53128 +59 24 54.7992           ~ 12 0
191 IRAS 22350+5817 HII 22 36 57.99696 +58 33 00.8748           ~ 8 0
192 IRAS 22430+5832 Y*O 22 44 59.83584 +58 48 33.8760           ~ 11 0
193 IRAS 22443+5831 * 22 46 17.5291848816 +58 47 26.545368012           ~ 7 0
194 IRAS 22451+6154 * 22 47 02.1 +62 10 11           B 22 0
195 PN K 3-85 Em* 22 50 52.3762670112 +59 30 19.154087892           ~ 24 1
196 IRAS 22506+5944 Y*O 22 52 38.09760 +60 01 01.1928           ~ 60 0
197 IRAS 22528+5936 IR 22 54 49.5813037488 +59 52 47.881453188           ~ 20 0
198 IRAS 22534+5653 Y*O 22 55 29.82 +57 09 24.9           ~ 19 0
199 CPM 38 Y*O 22 55 59.780 +58 14 42.49           ~ 43 0
200 GAL 109.87+02.11 Mas 22 56 18.1 +62 01 46           ~ 12 0
201 GAL 109.88+02.11 HII 22 56 19.4 +62 02 01           ~ 76 0
202 IRAS 22551+6221 HII 22 57 05.6 +62 37 48           ~ 42 0
203 IRAS 22564+5849 IR 22 58 28.7 +59 05 33           ~ 9 0
204 NAME SH 2-152 SE * 22 58 42.6 +58 47 45           ~ 53 1
205 IRAS 22593+6401 Cld 23 01 20.9 +64 17 20           ~ 5 0
206 IRAS 23004+5841 IR 23 02 30.0 +58 57 59           ~ 10 0
207 IRAS 23004+5642 Cld 23 02 35.0 +56 58 54           ~ 28 0
208 IRAS 23004+5637 IR 23 02 35.4560519016 +56 53 17.953782108           ~ 8 0
209 IRAS 23026+5948 IR 23 04 45.4557529824 +60 04 37.582742172           ~ 24 0
210 IC 1470 HII 23 05 09.9 +60 14 31   11.5       ~ 180 2
211 IRAS 23042+6000 IR 23 06 22.2177213936 +60 16 17.842393560           ~ 21 0
212 IRAS 23045+6332 IR 23 06 33.2854130376 +63 48 58.855402224           ~ 5 0
213 IRAS 23068+6117 HII 23 08 55.66 +61 34 06.2           ~ 16 0
214 IRAS 23071+6033 mul 23 09 14.1 +60 49 17           ~ 12 0
215 IRAS 23088+6014 LP* 23 11 07.0286952072 +60 31 43.602216204           ~ 16 1
216 JCMTSF J231256.2+594437 * 23 12 56.6 +59 44 30           B 12 0
217 IRAS 23116+6111 mul 23 13 45.6 +61 28 18           ~ 49 0
218 SH 2-159 Y*O 23 15 31.2384366062 +61 07 10.181362705           ~ 188 1
219 IRAS 23134+6131 MIR 23 15 33.73440 +61 47 50.8632           ~ 16 0
220 IRAS 23138+5945 mul 23 16 04.8 +60 02 00           ~ 46 0
221 IRAS 23140+6121 IR 23 16 11.7 +61 37 45           ~ 35 0
222 IRAS 23146+5954 IR 23 16 48.9 +60 10 46           ~ 20 0
223 CPM 39 Y*O 23 17 09.9467708640 +61 31 09.246087444           ~ 10 0
224 IRAS 23151+5912 HII 23 17 21.0 +59 28 49           ~ 102 0
225 EM* MWC 1080 Ae* 23 17 25.5895018656 +60 50 43.444557384   13.24 11.85 11.251   B0eq 331 0
226 IRAS 23192+5904 * 23 21 17.2601592912 +59 19 31.937235996           ~ 9 0
227 IRAS 23239+5826 MIR 23 26 14.40960 +58 42 46.1736           ~ 11 0
228 IRAS 23262+6401 Y*O 23 28 27.76320 +64 17 38.4792           ~ 18 0
229 IRAS 23264+6022 IR 23 28 45.6 +60 39 17           ~ 5 0
230 IRAS 23301+6316 IR 23 32 23.511 +63 33 19.14           ~ 15 0
231 IRAS 23314+6033 HII 23 33 43.8650890512 +60 50 26.959478136           ~ 31 0
232 IRAS 23330+6437 EB* 23 35 23.4690987192 +64 54 29.223307296           ~ 13 0
233 IRAS 23338+6207 LP? 23 36 08.1704265720 +62 23 46.510545660           ~ 11 0
234 IRAS 23341+6500 LP? 23 36 29.4935935983 +65 16 42.659247112           ~ 7 0
235 IRAS 23347+6428 IR 23 37 03.2 +64 45 18           ~ 7 0
236 IRAS 23350+6413 MIR 23 37 23.58840 +64 29 34.9800           ~ 8 0
237 Mol 160 Rad 23 40 54.5 +61 10 28           ~ 121 0
238 IRAS 23391+6035 IR 23 41 29.6 +60 52 11           ~ 8 0
239 IRAS 23435+5850 IR 23 45 57.751 +59 07 20.48           ~ 7 0
240 IRAS 23448+6010 SFR 23 47 19.8 +60 27 23           ~ 19 0
241 PN We 2-262 PN? 23 52 18.0 +62 32 11           ~ 20 0
242 IRAS 23506+6224 IR 23 53 06.2 +62 41 38           ~ 11 0
243 IRAS 23506+6005 * 23 53 08.5880747640 +60 22 18.524172432           ~ 7 0
244 IRAS 23507+6230 IR 23 53 12.9 +62 47 00           ~ 19 0
245 IRAS 23545+6508 * 23 57 05.2 +65 25 11           B 52 0
246 IRAS 23568+6706 Cld 23 59 25.8 +67 23 39           ~ 29 0
247 GAL 031.58+00.07 ? ~ ~           ~ 7 0

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