2014ApJ...782..114E

Query : 2014ApJ...782..114E

2014ApJ...782..114E - Astrophys. J., 782, 114 (2014/February-3)

Star formation relations in nearby molecular clouds.

EVANS II N.J., HEIDERMAN A. and VUTISALCHAVAKUL N.

Abstract (from CDS):

We test some ideas for star formation relations against data on local molecular clouds. On a cloud by cloud basis, the relation between the surface density of star formation rate and surface density of gas divided by a free-fall time, calculated from the mean cloud density, shows no significant correlation. If a crossing time is substituted for the free-fall time, there is even less correlation. Within a cloud, the star formation rate volume and surface densities increase rapidly with the corresponding gas densities, faster than predicted by models using the free-fall time defined from the local density. A model in which the star formation rate depends linearly on the mass of gas above a visual extinction of 8 mag describes the data on these clouds, with very low dispersion. The data on regions of very massive star formation, with improved star formation rates based on free-free emission from ionized gas, also agree with this linear relation.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: Milky Way - stars: formation

CDS comments: Table 1: Objects Oph North 1-6 ([HTH2012] OphN N) are not in SIMBAD.

Simbad objects: 36

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Number of rows : 36
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 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1553 0
2 LDN 1442 DNe 03 50 18 +38 59.0           ~ 11 0
3 LDN 1449 DNe 03 53.3 +37 39           ~ 17 0
4 LDN 1456 DNe 03 55.3 +37 09           ~ 10 0
5 NAME Auriga reg 04 20 00.0 +38 05 00           ~ 238 0
6 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
7 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
8 NAME Musca Cld 12 23 -71.3           ~ 258 0
9 IRAS 12340-7958 LP* 12 37 39.7408011816 -80 15 13.707391932   16.11 14.39 13.63 9.81 ~ 108 0
10 NAME Cha III MoC 12 37.8 -80 15           ~ 147 2
11 NAME Cha II MoC 12 54 -77.2           ~ 361 0
12 NGC 5179 LIN 13 29 30.9002483928 +11 44 44.876500152   14.9       ~ 57 0
13 Lupus 1 Cld 15 43 02.1 -34 09 06           ~ 320 0
14 Lupus 4 MoC 16 03 12.4 -42 07 43           ~ 163 0
15 Lupus 3 SFR 16 09.6 -39 03           ~ 348 0
16 Lupus 5 MoC 16 21 -37.5           ~ 63 0
17 Lupus 6 Cld 16 25 -40.3           ~ 51 1
18 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
19 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1
20 [EC92] 95 Y*O 18 29 57.893 +01 12 46.25           K1.0 79 3
21 NAME Aql Region reg 18 31.1 -02 10           ~ 456 0
22 NAME Aql Rift DNe 18 32 -01.0           ~ 355 1
23 NAME Corona Australis Cloud MoC 19 01 51 -36 58.9           ~ 554 0
24 LDN 1152 DNe 20 35 50.2 +67 54 22           ~ 73 0
25 LDN 1148 DNe 20 40 31.6 +67 21 45           ~ 68 0
26 LDN 1155 DNe 20 43.5 +67 41           ~ 28 0
27 IRAS 20582+7724 Y*O 20 57 12.9250225656 +77 35 43.656301932           ~ 119 0
28 LDN 1228 DNe 20 57 13 +77 35.8           ~ 131 0
29 LDN 1172 DNe 21 02 27.7 +67 54 08           ~ 57 0
30 LDN 1241 DNe 21 50.0 +76 44           ~ 19 0
31 LDN 1144 DNe 21 50.5 +60 07           ~ 7 0
32 IC 5146 OpC 21 53 29.3 +47 14 46           ~ 507 2
33 LDN 1247 DNe 22 21.9 +75 06           ~ 18 0
34 LDN 1251 DNe 22 36.1 +75 16           ~ 119 0
35 NAME Cepheus Flare MoC 23 34 +72.0           ~ 142 0
36 NAME Gould Belt PoG ~ ~           ~ 956 1

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