J/ApJS/184/1 Molecular clouds in the LMC by NANTEN. II. (Kawamura+, 2009)
The second survey of the molecular clouds in the Large Magellanic Cloud by
NANTEN.
II. Star formation.
Kawamura A., Mizuno Y., Minamidani T., Fillipovic M.D., Staveley-Smith L.,
Kim S., Mizuno N., Onishi T., Mizuno A., Fukui Y.
<Astrophys. J. Suppl. Ser., 184, 1-17 (2009)>
=2009ApJS..184....1K 2009ApJS..184....1K
ADC_Keywords: Molecular clouds ; Magellanic Clouds ; H II regions ;
Radio sources
Keywords: galaxies: individual (Large Magellanic Cloud) -
galaxies: star clusters - ISM: clouds - stars: formation
Abstract:
We studied star formation activities in the molecular clouds in the
Large Magellanic Cloud. We have utilized the second catalog of 272
molecular clouds obtained by NANTEN (4m radio telescope of Nagoya
University at Las Campanas Observatory, Chile) to compare the cloud
distribution with signatures of massive star formation including
stellar clusters, and optical and radio HII regions. We find that the
molecular clouds are classified into three types according to the
activities of massive star formation: Type I shows no signature of
massive star formation; Type II is associated with relatively small
HII region(s); and Type III with both HII region(s) and young stellar
cluster(s). The radio continuum sources were used to confirm that Type
I giant molecular clouds (GMCs) do not host optically hidden HII
regions. These signatures of massive star formation show a good
spatial correlation with the molecular clouds in the sense that they
are located within ∼100pc of the molecular clouds.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 365 272 Associated HII regions, OB associations, and
young clusters
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See also:
VII/232 : Nebulae in the Magellanic Clouds (Davies+ 1976)
J/PASJ/53/971 : CO catalog of LMC molecular clouds (Mizuno+, 2001)
J/ApJS/178/56 : CO observations of LMC Giant Molecular clouds (Fukui+, 2008)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [FKM2008] Running identification number (1)
5- 9 A5 --- --- LMC N
11- 20 A10 --- LMCN Molecular cloud designation (JHHMM+DDMM) (1)
22-124 A103 --- HII-H Associated Henize (1956ApJS....2..315H 1956ApJS....2..315H)
HII region(s) (LHA 120-N NNNA in Simbad)
126-258 A133 --- HII-D Associated Davies et al. (1976, Cat. VII/232)
region(s) (DEM L NNNa in Simbad)
260-359 A100 --- Clusters Associated young clusters and associations (2)
361-363 A3 --- Type Giant Molecular Cloud type (I, II or III) (4)
365 A1 --- n_[FKM2008] Note on Hα source (3)
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Note (1): The number and name of the clouds are from Tables 1 and 2 of Paper I,
(Fukui et al., Cat. J/ApJS/178/56, molecular clouds designated by
[FKM2008] NNN = [FKM2008] LMC N JHHMM+DDMM in Simbad).
Note (2): SWB 0 clusters and associations by Bica et al. (1996ApJS..102...57B 1996ApJS..102...57B).
Note (3): Notes as follows:
1 = Hα source is seen at the peak of the cloud.
2 = Hα source is seen within the cloud.
3 = Diffuse Hα emission, a part of the LMC 4, is seen across the
cloud.
4 = Hα source, possibly an OB star (FAUST 840; UV emission source)
is seen within the cloud.
Note (4): Types are defined in "Abstract" section above:
* Type I shows no signature of massive star formation;
* Type II is associated with relatively small HII region(s);
* Type III is associated with both HII region(s) and young stellar
cluster(s).
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History:
From electronic version of the journal
References:
Fukui et al. Paper I. 2008ApJS..178...56F 2008ApJS..178...56F Cat. J/ApJS/178/56
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 05-Feb-2010