2008BaltA..17..143S

Query : 2008BaltA..17..143S

2008BaltA..17..143S - Baltic Astronomy, 17, 143-159 (2008/August-0)

O-like stars in the direction of the North America and Pelican nebulae.

STRAIZYS V. and LAUGALYS V.

Abstract (from CDS):

In the area covering the complex of the North America and Pelican nebulae we identified 13 faint stars with J-H and H-Ks color indices which simulate heavily reddened O-type stars. One of these stars is CP05-4 classified as O5V by Comeron and Pasquali (2005). Combining magnitudes of these stars in the passbands IC, J, H, Ks and [8.3] we were able to suspect that two of them are carbon stars and five are late M-type AGB stars. Interstellar extinction in the direction of these stars was estimated from the background red clump giants in the J-H vs. H-Ks diagram and from star counts in the Ks passband. Four or five stars are found to have a considerable probability of being O-type stars, contributing to the ionization of North America and Pelican. If they really are O-type stars, their interstellar extinction AV should be from 16 to 35 mag. Two of them seem to be responsible for bright E and J radio rims discovered by Matthews & Goss (1980).

Abstract Copyright: ∼

Journal keyword(s): ISM: dust clouds: individual: L935 - H II regions: individual: W80 - stars: early-type - stars: fundamental parameters (classification, colors)

Nomenclature: Table 1: [SL2008c] NN (Nos 1-13).

Simbad objects: 76

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Number of rows : 76
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 V* W And S* 02 17 32.9612209924 +44 18 17.757276489   9.62   7.39   S7-8/1e-M7Se 225 1
2 V* RU Her Mi* 16 10 14.5126789272 +25 04 14.306977524   13.82 12.24 7.56 4.15 M6-7e 224 0
3 V* V506 Cyg Mi* 20 30 37.8095800488 +44 55 34.883716692     13.7 10.31   M7 12 0
4 V* V1660 Cyg Mi* 20 30 58.8241456272 +41 45 12.508629012           ~ 9 0
5 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
6 V* DG Cyg Mi* 20 43 25.4436305304 +43 11 50.765151012   16.55 13.41 10.15 8.34 M9 44 0
7 BC 247 C* 20 47 55.7688836640 +43 47 21.089668128   14.5       C 11 0
8 [ABC90] cyb 25 C* 20 48 17.3065945056 +44 17 07.876925088           C 3 0
9 IRAS 20472+4332 C* 20 49 00.9412393992 +43 43 47.667719640           C 8 0
10 IRAS 20476+4422 AB* 20 49 24.9824917560 +44 33 49.170650400           O-rich 18 0
11 2MASS J20495723+4422538 * 20 49 57.2429272800 +44 22 53.861531340           ~ 3 0
12 [ABC90] cyb 19 C* 20 50 02.0380146552 +43 01 43.405686480           C 7 0
13 BC 265 C* 20 50 13.1100915960 +42 59 49.319824200           C 8 0
14 [ABC90] cyb 20 C* 20 50 30.4848500088 +43 20 20.438818800           C 5 0
15 IRAS 20487+4415 Y*O 20 50 35.0461732248 +44 26 29.619154176           ~ 6 0
16 BC 268 C* 20 50 50.4543040176 +42 33 25.046991504           C 6 0
17 IC 5070 HII 20 51.0 +44 22           ~ 218 1
18 BC 248 C* 20 51 26.6424597864 +43 39 20.351606112   15.0       C 8 0
19 BC 249 C* 20 51 51.5410563048 +45 03 21.431489868   15.0       C 10 0
20 BC 269 C* 20 52 12.7385323344 +42 48 07.227169884           C 10 0
21 V* V2045 Cyg C* 20 52 37.1732880696 +45 20 19.279198536   15.0       C 13 0
22 2MASS J20524679+4402308 Y*O 20 52 46.8086409432 +44 02 30.808766328           ~ 4 0
23 [ABC90] cyb 24 C* 20 53 08.1181435128 +43 48 23.067291924           C 7 0
24 BC 251 C* 20 53 13.2842215872 +45 24 37.415654280   15.0       C 8 0
25 2MASS J20531582+4432570 LP? 20 53 15.8339015928 +44 32 57.009921396           ~ 4 0
26 [ABC90] cyb 30 C* 20 53 52.2572721019 +45 12 14.175168043           C 7 0
27 ZTF J205413.42+440259.0 LP* 20 54 13.4336566368 +44 02 59.044642800           ~ 5 0
28 ZTF J205416.26+434309.1 Mi* 20 54 16.2767798256 +43 43 09.145993476           ~ 5 0
29 BC 252 C* 20 54 47.5537605864 +43 22 41.730331908   14.0       C 11 0
30 C* 2942 C* 20 54 54.8965213584 +45 07 53.879501928       15.46   C 4 0
31 [ABC90] cyb 58 C* 20 55 01.3218300528 +44 14 28.824495720           C 3 0
32 ZTF J205525.16+441814.4 LP* 20 55 25.1681675424 +44 18 14.531827356           ~ 5 0
33 1RXS J205549.4+435216 Y*O 20 55 51.2556248952 +43 52 24.463877376   16.059 13.087 11.850   O3.5III(f*)+O8 30 1
34 2MASS J20555270+4353242 LP? 20 55 52.7035689888 +43 53 24.131645232           ~ 5 0
35 HD 199579 Y*O 20 56 34.7779063080 +44 55 29.000891928 5.16 6.01 5.96     O6.5V((f))z 375 0
36 BC 253 C* 20 56 38.9202300744 +44 18 02.442698676   14.2 14.6     C 11 0
37 NAME Gulf of Mexico DNe 20 56.8 +43 52           ~ 53 0
38 2MASS J20573647+4404559 LP* 20 57 36.4789341216 +44 04 55.965192456           ~ 5 1
39 [ABC90] cyb 54 C* 20 57 53.0617680072 +44 17 03.025242060           C 7 0
40 2MASS J20580673+4355141 Y*O 20 58 06.73 +43 55 14.1           ~ 5 0
41 C* 2948 C* 20 58 19.0503597216 +44 51 30.745613664       13.18   C 4 0
42 2MASS J20582424+4356386 Y*O 20 58 24.24 +43 56 38.6           ~ 4 0
43 2MASS J20582622+4342385 * 20 58 26.2302080064 +43 42 38.559249432           ~ 3 0
44 NGC 7000 Cl* 20 58 47 +44 19.8           ~ 427 0
45 C* 2951 C* 20 59 08.6354293752 +44 32 33.428251896           C 8 0
46 [ABC90] cyb 55 C* 20 59 31.9178798664 +44 05 37.294201896           C 4 0
47 [ABC90] cyb 56 C* 21 00 08.7293075784 +44 00 33.148521864           C 9 0
48 [ABC90] cyb 60 C* 21 00 17.9743210704 +42 57 39.984137424           C 8 0
49 C* 2959 C* 21 01 39.6209690160 +45 08 35.421969300           C 7 0
50 [ABC90] cyb 66 C* 21 02 12.4636937760 +45 26 37.682635704           C 8 0
51 [ABC90] cyb 65 C*? 21 02 44.5738079832 +45 18 22.813907472           C? 4 0
52 V* V2054 Cyg C* 21 03 17.8100435592 +44 09 30.117547368   15.1       C 11 0
53 V* V2056 Cyg C* 21 03 36.1438435344 +45 07 54.500121552   13.9       C 10 0
54 [ABC90] cyb 61 C* 21 04 36.0848771712 +43 41 04.667129268           C 8 0
55 V* V780 Cyg Mi* 21 04 42.4203369096 +42 54 23.115108528           ~ 6 0
56 V* V1223 Cyg Mi* 21 04 42.8815058448 +41 12 45.178328340   14.73 12.62 14.62   M8 14 0
57 C* 2973 C* 21 05 14.5566475968 +45 04 32.743766532   14.0       C 10 0
58 V* V1225 Cyg Mi* 21 06 16.2354456480 +46 18 01.311039216     10.63 13.11   ~ 13 0
59 V* V580 Cyg Mi* 21 10 49.3744193280 +44 49 59.218884156           M7 11 0
60 V* V1232 Cyg Mi* 21 11 23.8199939880 +44 13 20.284253328           ~ 10 0
61 V* V528 Cyg Mi* 21 11 36.7555861488 +41 51 39.536816004     14.30 12.26   ~ 12 0
62 V* V1234 Cyg Mi* 21 12 49.5559004040 +41 23 28.255611804   14.76       M7-9 11 0
63 V* V1480 Cyg Mi* 21 13 24.9075297600 +44 01 24.804610536           ~ 11 0
64 V* V584 Cyg Mi* 21 13 40.6107645480 +44 02 08.448995868           ~ 10 0
65 V* BH Cyg Mi* 21 18 57.6341883312 +41 53 37.041566280           M5 9 0
66 V* V593 Cyg Mi* 21 19 09.8813289816 +42 38 17.920174668           ~ 10 0
67 V* V596 Cyg Mi* 21 21 37.6249844976 +41 40 53.054540652       11.42   ~ 12 0
68 V* V597 Cyg Mi* 21 22 01.5290800104 +42 50 50.670401892   14.18 11.89     M6.5: 14 0
69 V* V600 Cyg Mi* 21 22 56.4661081248 +45 29 40.622648028           M6 15 0
70 V* V601 Cyg Mi* 21 23 21.3827272608 +46 14 01.228494804   16.66 14.41 13.62   ~ 9 0
71 V* V603 Cyg C* 21 23 44.6056056648 +42 29 11.839555068     14.30 10.95   N 21 0
72 V* V1242 Cyg S* 21 24 48.6646973472 +45 00 55.019203956           S 18 0
73 V* V1243 Cyg Mi* 21 25 43.9991906400 +45 32 32.988741468       12.01   M7 22 0
74 V* V607 Cyg Mi* 21 26 52.2359931240 +41 39 03.286241028       11.18   ~ 14 0
75 V* BL Cyg Mi* 21 30 58.1680673232 +46 29 28.292339724     13.00 12.73   M6 16 0
76 V* R Cas Mi* 23 58 24.8682785040 +51 23 19.713029388 6.71 6.63 4.80     M6.5-9e 728 0

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