2014ApJ...780...32E

Query : 2014ApJ...780...32E

2014ApJ...780...32E - Astrophys. J., 780, 32 (2014/January-1)

Embedded star formation in S4G galaxy dust lanes.

ELMEGREEN D.M., ELMEGREEN B.G., ERROZ-FERRER S., KNAPEN J.H., TEICH Y., POPINCHALK M., ATHANASSOULA E., BOSMA A., COMERON S., EFREMOV Yu.N., GADOTTI D.A., GIL DE PAZ A., HINZ J.L., HO L.C., HOLWERDA B., KIM T., LAINE J., LAURIKAINEN E., MENENDEZ-DELMESTRE K., MIZUSAWA T., MUNOZ-MATEOS J.-C., REGAN M.W., SALO H., SEIBERT M. and SHETH K.

Abstract (from CDS):

Star-forming regions that are visible at 3.6 µm and Hα but not in the u, g, r, i, z bands of the Sloan Digital Sky Survey are measured in five nearby spiral galaxies to find extinctions averaging ∼3.8 mag and stellar masses averaging ∼5x104 M☉. These regions are apparently young star complexes embedded in dark filamentary shock fronts connected with spiral arms. The associated cloud masses are ∼107 M☉. The conditions required to make such complexes are explored, including gravitational instabilities in spiral-shocked gas and compression of incident clouds. We find that instabilities are too slow for a complete collapse of the observed spiral filaments, but they could lead to star formation in the denser parts. Compression of incident clouds can produce a faster collapse but has difficulty explaining the semi-regular spacing of some regions along the arms. If gravitational instabilities are involved, then the condensations have the local Jeans mass. Also in this case, the near-simultaneous appearance of equally spaced complexes suggests that the dust lanes, and perhaps the arms too, are relatively young.

Abstract Copyright: ∼

Journal keyword(s): galaxies: spiral - galaxies: star clusters: general - galaxies: star formation - stars: formation

Nomenclature: Table 2: [EEE2014] NGC NNNN NN N=15+16+12+13+17.

Simbad objects: 79

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Number of rows : 79
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 342 AGN 03 46 48.514 +68 05 45.98   10.5       ~ 1579 1
2 [EEE2014] NGC 4321 9 SFR 12 22 46.445 +15 48 50.65           ~ 1 0
3 [EEE2014] NGC 4321 8 SFR 12 22 46.575 +15 48 55.15           ~ 1 0
4 [EEE2014] NGC 4321 7 SFR 12 22 47.614 +15 49 48.78           ~ 1 0
5 [EEE2014] NGC 4321 6 SFR 12 22 48.238 +15 49 47.28           ~ 1 0
6 [EEE2014] NGC 4321 5 SFR 12 22 48.263 +15 50 09.03           ~ 1 0
7 [EEE2014] NGC 4321 4 SFR 12 22 48.471 +15 50 11.66           ~ 1 0
8 [EEE2014] NGC 4321 10 SFR 12 22 48.654 +15 48 04.53           ~ 1 0
9 [EEE2014] NGC 4321 3 SFR 12 22 48.705 +15 50 14.28           ~ 1 0
10 [EEE2014] NGC 4321 2 SFR 12 22 50.238 +15 50 19.91           ~ 1 0
11 [EEE2014] NGC 4321 1 SFR 12 22 50.498 +15 50 24.03           ~ 1 0
12 [EEE2014] NGC 4321 12 SFR 12 22 51.642 +15 49 33.41           ~ 1 0
13 [EEE2014] NGC 4321 14 SFR 12 22 51.797 +15 50 05.66           ~ 1 0
14 [EEE2014] NGC 4321 13 SFR 12 22 52.603 +15 49 39.04           ~ 1 0
15 [EEE2014] NGC 4321 15 SFR 12 22 54.656 +15 49 33.04           ~ 1 0
16 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1963 2
17 [EEE2014] NGC 4321 11 SFR 12 22 56.241 +15 48 10.16           ~ 1 0
18 [EEE2014] NGC 5055 5 SFR 13 15 38.651 +42 01 42.75           ~ 1 0
19 [EEE2014] NGC 5055 7 SFR 13 15 38.886 +42 02 05.63           ~ 1 0
20 [EEE2014] NGC 5055 6 SFR 13 15 39.155 +42 01 58.50           ~ 1 0
21 [EEE2014] NGC 5055 8 SFR 13 15 39.861 +42 02 19.51           ~ 1 0
22 [EEE2014] NGC 5055 9 SFR 13 15 39.895 +42 02 19.13           ~ 1 0
23 [EEE2014] NGC 5055 10 SFR 13 15 40.534 +42 02 40.14           ~ 1 0
24 [EEE2014] NGC 5055 4 SFR 13 15 42.286 +42 01 31.89           ~ 1 0
25 [EEE2014] NGC 5055 14 SFR 13 15 43.330 +42 00 57.40           ~ 1 0
26 [EEE2014] NGC 5055 11 SFR 13 15 47.401 +42 02 19.91           ~ 1 0
27 [EEE2014] NGC 5055 3 SFR 13 15 48.512 +42 01 10.91           ~ 1 0
28 M 63 LIN 13 15 49.2741893928 +42 01 45.728076108   9.34 8.59 8.35   ~ 1292 2
29 [EEE2014] NGC 5055 2 SFR 13 15 49.657 +42 01 12.78           ~ 1 0
30 [EEE2014] NGC 5055 12 SFR 13 15 50.364 +42 02 25.53           ~ 1 0
31 [EEE2014] NGC 5055 1 SFR 13 15 50.565 +42 01 16.91           ~ 1 0
32 [EEE2014] NGC 5055 16 SFR 13 15 52.281 +42 01 19.53           ~ 1 0
33 [EEE2014] NGC 5055 13 SFR 13 15 53.326 +42 02 22.53           ~ 1 0
34 [EEE2014] NGC 5055 15 SFR 13 15 56.958 +42 00 52.14           ~ 1 0
35 [EEE2014] NGC 5194 7 SFR 13 29 42.953 +47 11 05.30           ~ 1 0
36 [EEE2014] NGC 5194 8 SFR 13 29 43.359 +47 10 33.80           ~ 1 0
37 [EEE2014] NGC 5194 5 SFR 13 29 44.864 +47 11 55.18           ~ 1 0
38 [EEE2014] NGC 5194 4 SFR 13 29 45.231 +47 11 58.94           ~ 1 0
39 [EEE2014] NGC 5194 6 SFR 13 29 45.489 +47 11 55.56           ~ 1 0
40 [EEE2014] NGC 5194 3 SFR 13 29 46.997 +47 12 23.32           ~ 1 0
41 [EEE2014] NGC 5194 2 SFR 13 29 52.038 +47 12 42.82           ~ 1 0
42 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
43 [EEE2014] NGC 5194 9 SFR 13 29 54.098 +47 10 36.07           ~ 1 0
44 [EEE2014] NGC 5194 1 SFR 13 29 54.725 +47 12 36.45           ~ 1 0
45 [EEE2014] NGC 5194 12 SFR 13 29 55.828 +47 11 44.70           ~ 1 0
46 [EEE2014] NGC 5194 11 SFR 13 29 56.453 +47 11 15.82           ~ 1 0
47 [EEE2014] NGC 5194 10 SFR 13 29 56.526 +47 10 45.82           ~ 1 0
48 [EEE2014] NGC 5248 3 SFR 13 37 28.780 +08 53 27.66           ~ 1 0
49 [EEE2014] NGC 5248 2 SFR 13 37 29.033 +08 54 20.91           ~ 1 0
50 [EEE2014] NGC 5248 4 SFR 13 37 29.286 +08 53 14.91           ~ 1 0
51 [EEE2014] NGC 5248 1 SFR 13 37 29.691 +08 54 30.29           ~ 1 0
52 [EEE2014] NGC 5248 5 SFR 13 37 30.374 +08 52 50.16           ~ 1 0
53 [EEE2014] NGC 5248 13 SFR 13 37 31.285 +08 53 31.41           ~ 1 0
54 [EEE2014] NGC 5248 12 SFR 13 37 31.386 +08 53 37.04           ~ 1 0
55 NGC 5248 G 13 37 32.0145074088 +08 53 06.496982448   11.4       ~ 554 0
56 [EEE2014] NGC 5248 6 SFR 13 37 32.601 +08 52 43.41           ~ 1 0
57 [EEE2014] NGC 5248 7 SFR 13 37 32.930 +08 52 32.54           ~ 1 0
58 [EEE2014] NGC 5248 11 SFR 13 37 33.967 +08 53 12.29           ~ 1 0
59 [EEE2014] NGC 5248 9 SFR 13 37 34.575 +08 53 06.29           ~ 1 0
60 [EEE2014] NGC 5248 8 SFR 13 37 34.929 +08 53 00.29           ~ 1 0
61 [EEE2014] NGC 5248 10 SFR 13 37 35.106 +08 52 20.54           ~ 1 0
62 [EEE2014] NGC 5457 15 SFR 14 02 57.854 +54 19 20.93           ~ 1 0
63 [EEE2014] NGC 5457 16 SFR 14 02 58.199 +54 19 07.06           ~ 1 0
64 [EEE2014] NGC 5457 6 SFR 14 03 03.198 +54 23 01.84           ~ 1 0
65 [EEE2014] NGC 5457 5 SFR 14 03 03.285 +54 22 49.09           ~ 1 0
66 [EEE2014] NGC 5457 4 SFR 14 03 03.843 +54 22 47.22           ~ 1 0
67 [EEE2014] NGC 5457 3 SFR 14 03 04.745 +54 22 45.73           ~ 1 0
68 [EEE2014] NGC 5457 2 SFR 14 03 05.818 +54 22 45.35           ~ 1 0
69 [EEE2014] NGC 5457 1 SFR 14 03 07.750 +54 22 43.86           ~ 1 0
70 [EEE2014] NGC 5457 13 SFR 14 03 12.514 +54 19 07.87           ~ 1 0
71 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
72 [EEE2014] NGC 5457 14 SFR 14 03 14.186 +54 19 08.99           ~ 1 0
73 [EEE2014] NGC 5457 12 SFR 14 03 19.032 +54 20 18.73           ~ 1 0
74 [EEE2014] NGC 5457 11 SFR 14 03 20.620 +54 20 47.22           ~ 1 0
75 [EEE2014] NGC 5457 10 SFR 14 03 26.243 +54 21 25.07           ~ 1 0
76 [EEE2014] NGC 5457 17 SFR 14 03 27.177 +54 19 46.81           ~ 1 0
77 [EEE2014] NGC 5457 9 SFR 14 03 27.230 +54 21 27.31           ~ 1 0
78 [EEE2014] NGC 5457 8 SFR 14 03 28.604 +54 21 44.92           ~ 1 0
79 [EEE2014] NGC 5457 7 SFR 14 03 29.293 +54 22 02.54           ~ 1 0

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