2007MNRAS.379.1237M

Query : 2007MNRAS.379.1237M

2007MNRAS.379.1237M - Mon. Not. R. Astron. Soc., 379, 1237-1247 (2007/August-2)

Champagne flow and triggered star formation in NGC 1893.

MAHESWAR G., SHARMA S., BIMAN J.M., PANDEY A.K. and BHATT H.C.

Abstract (from CDS):

Using Hα grism spectroscopy and optical and Two-Micron All-Sky Survey photometry of the fields containing NGC 1893 and two emission nebulae, Sim 129 and Sim 130, we show the presence of a number of Hα and near-infrared excess sources towards the region between HD 242935 and the two emission nebulae. Among them a large majority of these pre-main-sequence candidate sources are concentrated towards regions closer to Sim 129 and Sim 130. Age distribution of these sources (viz. main-sequence stars in the cluster, including HD 242935, young sources located in the region between HD 242935 and two nebulae and those located inside Sim 129) obtained from their positions in optical V,V - I colour-magnitude diagram strongly suggest `small-scale sequential star formation' along the axes of the clouds caused by the outward advance of ionization/shock front from the Hii region. The IRAS source, IRAS 05198+3325, identified with CPM 16 is a Herbig Be (B3) type star showing Hα and Caii triplet lines in emission. From the orientation of the two emission nebulae it is suggested that HD 242935 is most likely responsible for the cometary morphology of the two nebulae and the trigger of star formation in the region. From the global distribution of the interstellar material, it is also suggested that the same source is responsible for the champagne flow causing the entire molecular cloud to have a cometary appearance.

Abstract Copyright: 2007 Director, ARIES, Nainital, India. Journal compilation © 2007 RAS

Journal keyword(s): stars: formation - stars: pre-main-sequence - ISM: globules - Hii regions

VizieR on-line data: <Available at CDS (J/MNRAS/379/1237): table1.dat>

Nomenclature: Table 1: [MSB2007] NN (Nos 1-49).

Simbad objects: 74

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Number of rows : 74
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 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
2 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
3 IC 410 Cl* 05 22.0 +33 29           ~ 56 0
4 HD 242908 Y*O 05 22 29.3024469216 +33 30 50.454124452 8.6 9.280 9.084 9.241   O4.5V(n)((fc))z 128 0
5 SH 2-236 HII 05 22.6 +33 22           ~ 36 1
6 2MASS J05223662+3325109 Y*? 05 22 36.6265670664 +33 25 10.974108180     19.26   17.14 ~ 1 0
7 2MASS J05223716+3325126 Y*O 05 22 37.1581186224 +33 25 12.670773420     17.532 16.841 15.988 ~ 4 0
8 LS V +33 15 Y*O 05 22 39.6835151291 +33 22 18.258113541 10.17 10.71 10.22 10.009 9.264 O7V(n)z 39 1
9 HD 242926 Y*O 05 22 40.0955764848 +33 19 09.399870012 9.04 9.65 9.40     O7Vz 87 0
10 NGC 1893 35 Be* 05 22 43.0138065288 +33 25 05.419907184 14.04 14.24 13.585   12.376 B1Ve 28 0
11 2MASS J05224340+3330034 Y*? 05 22 43.3989189384 +33 30 03.474149904     17.78   16.47 ~ 1 0
12 2MASS J05224378+3325257 Y*O 05 22 43.7807177064 +33 25 25.777884720     17.694   14.836 ~ 8 0
13 BD+33 1025 Y*O 05 22 43.9986915696 +33 26 26.656482120 9.84 10.37 10.28   9.904 O7.5V(n)z 47 0
14 2MASS J05224501+3325581 Y*O 05 22 45.0122428416 +33 25 58.078187688     18.723 17.839 16.794 ~ 5 0
15 2MASS J05224602+3325270 Y*O 05 22 46.023 +33 25 27.02     17.74   15.58 ~ 5 0
16 HD 242935 ** 05 22 46.541232 +33 25 11.34300 8.9     9.608   O7.5V((f)) 73 0
17 2MASS J05224683+3329279 Y*O 05 22 46.8453682248 +33 29 28.081163904     18.577 18.028 16.597 ~ 7 0
18 2MASS J05224920+3327142 Y*? 05 22 49.2016607472 +33 27 14.227295256   17.21 16.77   15.81 ~ 3 0
19 Cl* NGC 1893 CUF 2116 Y*O 05 22 51.0341452896 +33 25 47.129886948     15.173 14.766 13.996 F7:Ve 16 1
20 2MASS J05225118+3326328 Y*O 05 22 51.1795899888 +33 26 33.011306808     19.82   17.468 ~ 3 0
21 2MASS J05225188+3324447 Y*O 05 22 51.8799446088 +33 24 44.851616316     19.323 18.277 17.169 ~ 5 0
22 [MJD95] J052252.21+332958.3 Y*O 05 22 52.2262352760 +33 29 58.034016888   15.65 15.242 14.516 13.794 F6:Ve 11 0
23 2MASS J05225247+3327380 Y*? 05 22 52.4693218056 +33 27 38.183079780     18.53   16.96 ~ 1 0
24 NGC 1893 OpC 05 22 52.8 +33 26 32           ~ 270 0
25 2MASS J05225322+3329121 Y*O 05 22 53.2188607200 +33 29 12.208593696     20.233 19.159 18.017 ~ 6 0
26 2MASS J05225338+3330326 Y*O 05 22 53.3454398982 +33 30 32.919458690   13.04 13.388 13.060 12.674 ~ 8 0
27 2MASS J05225368+3329086 Y*O 05 22 53.6872213608 +33 29 08.667228552   16.51 16.143 15.822 15.427 ~ 7 0
28 2MASS J05225380+3329585 Y*O 05 22 53.8075722792 +33 29 58.466847732     20.293 18.988 18.087 ~ 4 0
29 2MASS J05225382+3325415 Y*O 05 22 53.8186622808 +33 25 41.554586388     19.04   17.048 ~ 5 0
30 2MASS J05225383+3326441 Y*O 05 22 53.8366157760 +33 26 44.294477388     17.593 16.795 15.940 ~ 4 0
31 2MASS J05225500+3329468 Y*? 05 22 54.9792830688 +33 29 47.234671044     20.867 19.688 18.174 ~ 3 0
32 SIM 130 ISM 05 22 55.0 +33 31 57           ~ 19 0
33 2MASS J05225510+3327539 TT? 05 22 55.1036167488 +33 27 53.970269940     18.20   16.653 ~ 6 0
34 2MASS J05225761+3325207 Y*O 05 22 57.6080678496 +33 25 20.762560344     18.810 17.923 16.922 ~ 4 0
35 [MJD95] J052258.08+333041.3 TT? 05 22 58.1003031817 +33 30 40.999435836   15.51 15.373 15.027 14.577 A3:Ve 10 0
36 2MASS J05225966+3326440 Y*O 05 22 59.6651844048 +33 26 44.185968312   14.33 14.238   13.689 ~ 7 0
37 2MASS J05230087+3328169 Y*O 05 23 00.8705921560 +33 28 17.016240875     19.704 18.012 17.450 ~ 6 0
38 2MASS J05230107+3329250 Y*O 05 23 01.0697644176 +33 29 24.943281324     20.192 19.137 18.094 ~ 4 0
39 2MASS J05230248+3327239 Y*O 05 23 02.4942950424 +33 27 24.102642708     20.733 19.565 17.835 ~ 4 0
40 Cl* NGC 1893 NMI E13 Y*O 05 23 02.7543736992 +33 29 40.230544344     19.191 18.156 17.192 ~ 6 0
41 2MASS J05230287+3328177 Y*O 05 23 02.8724726400 +33 28 17.842920600     18.860 17.791 16.925 ~ 5 0
42 ZTF J052303.30+332925.2 EB* 05 23 03.3082326360 +33 29 25.199890548     18.324 17.382 16.430 ~ 8 0
43 2MASS J05230363+3327335 Y*? 05 23 03.6303302472 +33 27 33.961782744   16.42 16.19   15.38 ~ 2 0
44 2MASS J05230369+3329150 Y*? 05 23 03.6932004128 +33 29 15.027934798   13.68 13.95   13.35 ~ 6 0
45 2MASS J05230382+3329241 Y*O 05 23 03.8194287168 +33 29 24.176464656     18.329 17.130 16.451 ~ 5 0
46 2MASS J05230404+3329484 Y*O 05 23 04.0362095160 +33 29 48.437265336     19.546 18.404 17.277 ~ 7 0
47 2MASS J05230422+3328582 Y*O 05 23 04.2244870512 +33 28 58.245835260     17.919 17.394 15.993 ~ 9 0
48 V* NX Aur Or* 05 23 04.2574046796 +33 28 46.476388753     14.875   13.032 B4Ve 20 0
49 2MASS J05230434+3328323 Y*O 05 23 04.345 +33 28 32.34     18.972 17.903 16.984 ~ 4 0
50 2MASS J05230439+3328213 Y*O 05 23 04.3936469928 +33 28 21.346660200     18.403 17.477 16.442 ~ 4 0
51 2MASS J05230537+3327064 Y*? 05 23 05.375 +33 27 06.43     19.38   17.26 ~ 1 0
52 Cl* NGC 1893 NMI E15 Y*O 05 23 06.3097197648 +33 31 01.682643396     17.832 16.969 16.130 ~ 7 0
53 ZTF J052306.72+332840.1 LP* 05 23 06.7131654360 +33 28 40.082431332   16.2 15.904 15.065 14.289 ~ 7 0
54 2MASS J05230675+3329592 Y*? 05 23 06.7480134648 +33 29 59.307158580   15.9 15.643 15.378 14.942 ~ 6 0
55 2MASS J05230793+3326529 Y*O 05 23 07.9245002208 +33 26 53.281573908     19.639 18.527 17.542 ~ 4 0
56 SIM 129 ISM 05 23 08.0 +33 28 50           ~ 16 0
57 IRAS 05198+3325 Y*O 05 23 08.244 +33 28 34.01   14.45 15.734 15.442 14.085 B1.5Ve 26 0
58 EM* GGA 333 Y*O 05 23 09.3254637888 +33 30 02.347909884 12.29 12.85 12.692 12.103 11.721 B1.5Ve 19 0
59 Cl* NGC 1893 NMI E18 Y*O 05 23 09.9488507880 +33 29 08.660418144     18.721 17.689 16.614 ~ 6 0
60 2MASS J05231055+3328133 Y*? 05 23 10.5424273872 +33 28 13.109079684   18.27 17.93   16.43 ~ 2 0
61 2MASS J05231175+3328321 Y*O 05 23 11.7516903072 +33 28 32.227039344     19.35 18.584 17.468 ~ 3 0
62 2MASS J05231226+3328043 Y*? 05 23 12.2635430280 +33 28 04.437956748     17.53   16.35 ~ 1 0
63 2MASS J05231657+3328381 Y*? 05 23 16.5680027952 +33 28 38.086933620   16.99 16.66   15.80 ~ 2 0
64 2MASS J05231702+3328579 Y*O 05 23 17.0143523568 +33 28 57.830220120     19.529 18.536 17.649 ~ 4 0
65 IRAS 05202+3309 Cld 05 23 30.1 +33 11 54           ~ 10 0
66 Ass Aur OB 2 As* 05 28 +34.9           ~ 48 0
67 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
68 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
69 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
70 SA 98- reg 06 52 04.1 -00 23 58           ~ 179 0
71 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
72 IC 1396 OpC 21 38 51.4 +57 31 52           ~ 523 1
73 NAME IC 1396 North CGb 21 40 42.6537 +58 16 01.882           ~ 193 1
74 Ass Cep OB 2 As* 21 51 +60.0           ~ 303 0

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