2014ApJ...793...37A


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.20CET03:45:52

2014ApJ...793...37A - Astrophys. J., 793, 37 (2014/September-3)

From gas to stars in energetic environments: dense gas clumps in the 30 Doradus region within the Large Magellanic Cloud.

ANDERSON C.N., MEIER D.S., OTT J., HUGHES A., WONG T., HENKEL C., CHEN R., INDEBETOUW R., LOONEY L., MULLER E., PINEDA J.L. and SEALE J.

Abstract (from CDS):

We present parsec-scale interferometric maps of HCN(1-0) and HCO+(1-0) emission from dense gas in the star-forming region 30 Doradus, obtained using the Australia Telescope Compact Array. This extreme star-forming region, located in the Large Magellanic Cloud (LMC), is characterized by a very intense ultraviolet ionizing radiation field and sub-solar metallicity, both of which are expected to impact molecular cloud structure. We detect 13 bright, dense clumps within the 30 Doradus-10 giant molecular cloud. Some of the clumps are aligned along a filamentary structure with a characteristic spacing that is consistent with formation via varicose fluid instability. Our analysis shows that the filament is gravitationally unstable and collapsing to form stars. There is a good correlation between HCO+ emission in the filament and signatures of recent star formation activity including H2 O masers and young stellar objects (YSOs). YSOs seem to continue along the same direction of the filament toward the massive compact star cluster R136 in the southwest. We present detailed comparisons of clump properties (masses, linewidths, and sizes) in 30Dor-10 to those in other star forming regions of the LMC (N159, N113, N105, and N44). Our analysis shows that the 30Dor-10 clumps have similar masses but wider linewidths and similar HCN/HCO+ (1-0) line ratios as clumps detected in other LMC star-forming regions. Our results suggest that the dense molecular gas clumps in the interior of 30Dor-10 are well shielded against the intense ionizing field that is present in the 30Doradus region.

Abstract Copyright:

Journal keyword(s): galaxies: abundances - galaxies: individual: Large Magellanic Cloud - ISM: molecules

Nomenclature: Fig. 1, Table 1: [AMO2014] NN (Nos 1-13).

Simbad objects: 25

goto Full paper

goto View the reference in ADS

Number of rows : 25

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 LHA 120-N 105A HII 05 09 34.3 -68 53 45           ~ 48 1
2 LHA 120-N 105 EmO 05 09 57.1 -68 53 31           ~ 37 0
3 LHA 120-N 113 HII 05 13 21.7 -69 21 33           ~ 95 1
4 LHA 120-N 44 EmO 05 22 06.9 -67 56 46           ~ 161 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14543 1
6 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1698 2
7 [AMO2014] 7 cor 05 38 45.08 -69 04 39.0           ~ 1 0
8 [AMO2014] 4 cor 05 38 45.24 -69 05 05.7           ~ 1 0
9 [AMO2014] 8 cor 05 38 46.80 -69 04 42.6           ~ 1 0
10 [AMO2014] 5 cor 05 38 47.02 -69 04 58.9           ~ 1 0
11 [AMO2014] 11 cor 05 38 47.47 -69 04 05.1           ~ 1 0
12 [AMO2014] 12 cor 05 38 48.27 -69 03 35.5           ~ 1 0
13 [AMO2014] 6 cor 05 38 49.03 -69 04 43.8           ~ 1 0
14 [AMO2014] 3 cor 05 38 50.73 -69 04 21.9           ~ 1 0
15 [MMM2008] 30 Dor 1 MoC 05 38 50.8 -69 04 15           ~ 22 0
16 [AMO2014] 9 cor 05 38 51.34 -69 03 15.4           ~ 1 0
17 [AMO2014] 2 cor 05 38 52.17 -69 04 06.1           ~ 1 0
18 [AMO2014] 10 cor 05 38 52.87 -69 04 36.8           ~ 1 0
19 [AMO2014] 1 cor 05 38 55.09 -69 04 16.9           ~ 1 0
20 [AMO2014] 13 cor 05 38 56.40 -69 04 17.4           ~ 1 0
21 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 248 2
22 LHA 120-N 214 EmO 05 40 54 -71 14.7           ~ 15 0
23 QSO J0635-7516 QSO 06 35 46.5080299 -75 16 16.815501   15.96 15.75 15.82   ~ 504 1
24 3C 446 BLL 22 25 47.25929302 -04 57 01.3907581   18.83 18.39 16.3   ~ 755 1
25 NAME Local Group GrG ~ ~           ~ 6801 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2014ApJ...793...37A and select 'bookmark this link' or equivalent in the popup menu


2020.02.20-03:45:52

© Université de Strasbourg/CNRS

    • Contact