2019ApJ...873...31K

Query : 2019ApJ...873...31K

2019ApJ...873...31K - Astrophys. J., 873, 31-31 (2019/March-1)

The core mass function in the infrared dark cloud G28.37+0.07.

KONG S.

Abstract (from CDS):

In this paper, we analyze the 1.3 mm continuum ALMA data that cover the majority of the infrared dark cloud (IRDC) G28.37+0.07. With a spatial resolution of 0.''5 (2500 au at 5 kpc), the continuum image reveals five groups of dense cores. Each core group has a projected physical scale of about 1 pc, with core masses spanning a dynamic range of about 100. We use the dendrogram method (astrodendro) and a newly developed graph method (astrograph) to identify individual cores. The core masses are estimated through the millimeter continuum flux, assuming constant temperature and using an NH3-based gas temperature. We construct core mass functions (CMFs) based on the two methods and fit a power-law relation dN/d log M ∝ M–α to the CMFs for M > 0.79 M☉. In the constant-temperature scenario, astrograph gives α = 0.80 ± 0.10, while astrodendro gives α = 0.71 ± 0.11, both significantly shallower than the Salpeter-type initial mass function with α = 1.35. In the scenario where the NH3 gas temperature is applied to cores, astrograph gives α = 1.37 ± 0.06, while astrodendro gives α = 0.87 ± 0.07. Regional CMF slope variation is seen between the core groups. We also compare CMFs in three different environments, including IRDC G28.37+0.07, IRDC clumps, and G286.21+0.17, using the identical dendrogram method. Results show that IRDCs have smaller α than the cluster-forming cloud G286.21+0.17.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): dust, extinction - ISM: clouds - ISM: structure - stars: formation - stars: luminosity function, mass function - stars: protostars

Nomenclature: [K2019] NNN (Nos 1 to 280).

Simbad objects: 59

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Number of rows : 59
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 NAME f-Shaped Filament in Orion Cld 05 35.0 -05 30           ~ 133 0
3 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
4 NAME Orion A South MoC 05 43.0 -08 40           ~ 20 0
5 [DBS2003] 127 cor 10 38 33 -58 19.3           ~ 39 0
6 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
7 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 442 1
8 SDC G14.225-0.506 DNe 18 18 11.49 -16 49 29.6           ~ 26 0
9 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1
10 [HCP2006] Cluster A Cld 18 29 56 +01 14.8           ~ 50 0
11 AGAL G028.364+00.121 cor 18 42 40.01 -04 00 34.4           ~ 31 0
12 [TKZ2016] C1-Sa Y*O 18 42 46.442901 -04 04 14.94456           ~ 13 0
13 AGAL G028.324+00.067 Y*O 18 42 46.7 -04 04 08           ~ 59 0
14 AGAL G028.354+00.072 MoC 18 42 49.34 -04 02 27.3           ~ 37 0
15 [ZWT2009] P1-SMA5 smm 18 42 49.82 -04 03 25.3           ~ 5 0
16 [ZWL2015] 37 mm 18 42 49.91 -04 03 25.2           ~ 2 0
17 [WZW2011] SMA4c smm 18 42 50.20 -04 03 20.3           ~ 3 0
18 [ZWL2015] 27 mm 18 42 50.20 -04 03 19.1           ~ 2 0
19 [WZW2011] SMA4a smm 18 42 50.28 -04 03 20.2           ~ 4 0
20 [ZWL2015] 36 mm 18 42 50.30 -04 03 23.8           ~ 2 0
21 [ZWL2015] 18 mm 18 42 50.31 -04 03 15.5           ~ 2 0
22 [WZW2011] SMA4b smm 18 42 50.32 -04 03 21.0           ~ 3 0
23 [ZWL2015] 35 mm 18 42 50.33 -04 03 23.1           ~ 2 0
24 [ZWL2015] 32 mm 18 42 50.39 -04 03 22.5           ~ 2 0
25 [ZWL2015] 31 mm 18 42 50.39 -04 03 21.0           ~ 2 0
26 AGAL G028.344+00.061 cor 18 42 50.45 -04 03 17.7           ~ 93 0
27 [ZWL2015] 33 mm 18 42 50.49 -04 03 22.9           ~ 2 0
28 [ZWL2015] 23 mm 18 42 50.51 -04 03 17.2           ~ 2 0
29 [ZWL2015] 25 mm 18 42 50.53 -04 03 18.2           ~ 2 0
30 [ZWT2009] P1-SMA3 smm 18 42 50.58 -04 03 16.1           ~ 5 0
31 NAME Dragon Nebula DNe 18 42 50.6 -04 03 30           ~ 177 0
32 [ZWL2015] 21 mm 18 42 50.61 -04 03 17.0           ~ 2 0
33 [ZWL2015] 16 mm 18 42 50.63 -04 03 13.9           ~ 2 0
34 [ZWL2015] 24 mm 18 42 50.70 -04 03 18.2           ~ 2 0
35 [ZWL2015] 13 mm 18 42 50.70 -04 03 12.9           ~ 2 0
36 [ZWL2015] 17 mm 18 42 50.7228477504 -04 03 14.895577548           ~ 2 0
37 [ZWL2015] 34 mm 18 42 50.73 -04 03 22.9           ~ 2 0
38 [ZWL2015] 15 mm 18 42 50.73 -04 03 13.8           ~ 2 0
39 [ZWL2015] 22 mm 18 42 50.74 -04 03 17.2           ~ 2 0
40 [ZWL2015] 14 mm 18 42 50.75 -04 03 13.3           ~ 2 0
41 [WZW2011] SMA2b smm 18 42 50.76 -04 03 11.5           ~ 4 0
42 [WZW2011] SMA2c smm 18 42 50.79 -04 03 12.4           ~ 4 0
43 [ZWL2015] 26 mm 18 42 50.80 -04 03 18.7           ~ 2 0
44 [ZWL2015] 6 mm 18 42 50.84 -04 03 10.5           ~ 2 0
45 [WZW2011] SMA2a smm 18 42 50.85 -04 03 11.4           ~ 4 0
46 [ZWL2015] 7 mm 18 42 50.92 -04 03 11.3           ~ 2 0
47 [ZWL2015] 19 mm 18 42 50.93 -04 03 16.0           ~ 2 0
48 [ZWL2015] 12 mm 18 42 50.93 -04 03 12.9           ~ 2 0
49 [WZW2011] SMA2d smm 18 42 50.99 -04 03 09.5           ~ 4 0
50 [ZWL2015] 2 mm 18 42 51.130 -04 03 06.06           ~ 2 0
51 [ZWT2009] P1-SMA1 smm 18 42 51.18 -04 03 06.9           ~ 5 0
52 [ZWL2015] 8 mm 18 42 51.20 -04 03 11.3           ~ 2 0
53 [ZWL2015] 1 mm 18 42 51.21 -04 03 05.2           ~ 2 0
54 [ZWL2015] 3 mm 18 42 51.26 -04 03 06.5           ~ 2 0
55 AGAL G028.398+00.081 cor 18 42 51.86 -03 59 43.3           ~ 60 0
56 [RJS2006] MSXDC G028.37+00.07 MM14 MoC 18 42 52.59 -04 02 44.3           ~ 20 0
57 AGAL G028.361+00.054 cor 18 42 54.37 -04 02 31.7           ~ 36 1
58 AGAL G028.388+00.037 MoC 18 42 59.99 -04 01 33.1           ~ 29 0
59 AGAL G030.818-00.056 cor 18 47 47.0 -01 54 28           ~ 186 0

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