2018ApJ...854..154N


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST05:48:37

2018ApJ...854..154N - Astrophys. J., 854, 154-154 (2018/February-3)

Molecular cloud structures and massive star formation in N159.

NAYAK O., MEIXNER M., FUKUI Y., TACHIHARA K., ONISHI T., SAIGO K., TOKUDA K. and HARADA R.

Abstract (from CDS):

The N159 star-forming region is one of the most massive giant molecular clouds (GMCs) in the Large Magellanic Cloud (LMC). We show the 12CO, 13CO, CS molecular gas lines observed with ALMA in N159 west (N159W) and N159 east (N159E). We relate the structure of the gas clumps to the properties of 24 massive young stellar objects (YSOs) that include 10 newly identified YSOs based on our search. We use dendrogram analysis to identify properties of the molecular clumps, such as flux, mass, linewidth, size, and virial parameter. We relate the YSO properties to the molecular gas properties. We find that the CS gas clumps have a steeper size-linewidth relation than the 12CO or 13CO gas clumps. This larger slope could potentially occur if the CS gas is tracing shocks. The virial parameters of the 13CO gas clumps in N159W and N159E are low (<1). The threshold for massive star formation in N159W is 501 M pc–2, and the threshold for massive star formation in N159E is 794 M pc–2. We find that 13CO is more photodissociated in N159E than N159W. The most massive YSO in N159E has cleared out a molecular gas hole in its vicinity. All the massive YSO candidates in N159E have a more evolved spectral energy distribution type in comparison to the YSO candidates in N159W. These differences lead us to conclude that the giant molecular cloud complex in N159E is more evolved than the giant molecular cloud complex in N159W.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): Magellanic Clouds - stars: formation - stars: protostars

VizieR on-line data: <Available at CDS (J/ApJ/854/154): table9.dat table10.dat>

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9092 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5375 1
3 QSO B0332-403 BLL 03 34 13.6547438706 -40 08 25.401996186 18.54 18.35 17.87 17.5   ~ 253 1
4 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1008 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14325 1
6 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1674 2
7 QSO B0537-441 BLL 05 38 50.36155219 -44 05 08.9389165   15.77 16.48 16   ~ 764 2
8 LHA 120-N 159W MoC 05 39 32.510 -69 46 02.74           ~ 67 0
9 [GC2009] J053937.56-694525.3 Y*O 05 39 37.56 -69 45 25.3           ~ 10 0
10 2MASS J05394188-6946122 Y*O 05 39 41.886 -69 46 12.21           O6.5V 18 1
11 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 242 2
12 LHA 120-N 159E MoC 05 40 10.980 -69 44 35.84           ~ 39 0
13 3FGL J0601.2-7036 QSO 06 01 11.2517801292 -70 36 08.805554929       18.244   ~ 60 1
14 QSO J0635-7516 QSO 06 35 46.5080299 -75 16 16.815501   15.96 15.75 15.82   ~ 495 1
15 4C 01.28 BLL 10 58 29.60520747 +01 33 58.8237691   18.74 18.28 16.68   ~ 618 2
16 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11007 0

    Equat.    Gal    SGal    Ecl

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2019.10.23-05:48:37

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