2015MNRAS.453.3785P

Query : 2015MNRAS.453.3785P

2015MNRAS.453.3785P - Mon. Not. R. Astron. Soc., 453, 3785-3797 (2015/November-2)

Gravity or turbulence? - III. Evidence of pure thermal Jeans fragmentation at ∼ 0.1 pc scale.

PALAU A., BALLESTEROS-PAREDES J., VAZQUEZ-SEMADENI E., SANCHEZ-MONGE A., ESTALELLA R., FALL S.M., ZAPATA L.A., CAMACHO V., GOMEZ L., NARANJO-ROMERO R., BUSQUET G. and FONTANI F.

Abstract (from CDS):

We combine previously published interferometric and single-dish data of relatively nearby massive dense cores that are actively forming stars to test whether their `fragmentation level' is controlled by turbulent or thermal support. We find no clear correlation between the fragmentation level and velocity dispersion, nor between the observed number of fragments and the number of fragments expected when the gravitationally unstable mass is calculated including various prescriptions for `turbulent support'. On the other hand, the best correlation is found for the case of pure thermal Jeans fragmentation, for which we infer a core formation efficiency around 13 percent, consistent with previous works. We conclude that the dominant factor determining the fragmentation level of star-forming massive dense cores at 0.1 pc scale seems to be thermal Jeans fragmentation.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): turbulence - stars: formation - ISM: lines and bands - ISM: structure - radio continuum: ISM

Simbad objects: 27

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Number of rows : 27
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 [CB99] CB3-mm mm 00 28 42.7 +56 40 48           ~ 7 0
2 NAME W3 IRS 5 Y*O 02 25 40.54 +62 05 51.4           B1 367 0
3 GAL 174.20-00.08 Cld 05 30 45.9 +33 47 56           ~ 210 2
4 NAME OMC 1S PoC 05 35 14.5 -05 25 49           ~ 78 1
5 IRAS 05358+3543 Y*O 05 39 09.92 +35 45 17.2           ~ 171 0
6 [PGS81] IRS 1 Y*O 05 47 04.78 +00 21 42.8           ~ 88 0
7 NGC 2071 RNe 05 47 10 +00 18.0           ~ 661 1
8 2MASS J18100731-1929163 Y*O 18 10 07.320 -19 29 16.36           ~ 4 0
9 NAME HH 80-81 HH 18 19 06 -20 51.4           ~ 236 0
10 NAME HH 80-81 IRS HII 18 19 11.8 -20 47 35           ~ 157 0
11 AGAL G028.344+00.061 cor 18 42 50.45 -04 03 17.7           ~ 93 0
12 AGAL G030.818-00.056 cor 18 47 47.0 -01 54 28           ~ 186 0
13 IRAS 20126+4104 Y*O 20 14 25.8816769656 +41 13 36.879427236           B2.5-B0.5 469 0
14 RAFGL 2591 Y*O 20 29 24.8230 +40 11 19.590           ~ 640 0
15 [CQZ2019] N12-1 cor 20 36 57.40 +42 11 27.5           ~ 16 0
16 DR 21 (OH) cor 20 39 01.01 +42 22 50.2           ~ 427 0
17 [CLZ2017] Cyg-N48 cor 20 39 01.36 +42 22 06.7           ~ 23 0
18 [CLZ2017] Cyg-N53 cor 20 39 03.2 +42 25 49           ~ 19 0
19 [CQZ2019] N63-1 cor 20 40 05.2 +41 32 13           ~ 26 0
20 [BGE2002] BIMA 2 Y*O 21 40 42.36 +58 16 09.7           ~ 123 0
21 NAME IC 1396 North CGb 21 40 42.6537 +58 16 01.882           ~ 193 1
22 NGC 7129 OpC 21 43 01.1 +66 07 04     11.5     ~ 271 0
23 NAME NGC 7129 FIR 2 IR 21 44 01.5 +66 03 40           ~ 102 0
24 IRAS 22134+5834 Y*O 22 15 09.08 +58 49 07.8           ~ 77 0
25 LDN 1204A HII 22 21 26.68 +63 51 38.2           ~ 120 0
26 [PFG2013] I22198-MM2 mm 22 21 26.753 +63 51 37.90           ~ 6 0
27 [PFG2013] I22198-MM2-S mm 22 21 26.807 +63 51 37.14           ~ 6 0

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