J/A+A/515/A55 NGC 6334-NGC 6357 complex (Russeil+, 2010)
The earliest phases of high-mass star formation: the NGC 6334-NGC 6357 complex.
Russeil D., Zavagno A., Motte F., Schneider N., Bontemps S., Walsh A.J.
<Astron. Astrophys. 515, A55 (2010)>
=2010A&A...515A..55R 2010A&A...515A..55R
ADC_Keywords: H II regions ; Molecular clouds ; Spectra, infrared
Keywords: Dust, extinction - HII regions - stars: formation -
radio continuum: ISM - submillimeter: ISM - radio lines: general
Abstract:
Our knowledge of high-mass star formation has been mainly based on
follow-up studies of bright sources found by IRAS, and has thus been
incomplete for its earliest phases, which are inconspicuous at
infrared wavelengths. With a new generation of powerful bolometer
arrays, unbiased large-scale surveys of nearby high-mass star-forming
complexes now search for the high-mass analog of low-mass cores and
class 0 protostars.
Following the pioneering study of Cygnus X, we investigate the
star-forming region NGC 6334-NGC 6357 (∼1.7kpc)
Description:
From the SIMBA/SEST 1.2mm data of the NGC 6334-NGC 6357 complex, we
extracted dense cores following the method used for Cygnus X. We
constrain the properties of the most massive dense cores
(M>100M☉) thanks to new molecular line observations (among which
SiO, N2H+,H13CO+, HCO+ (1-0) and CH3CN) with Mopra and a
complete cross-correlation with infrared databases (e.g. MSX, GLIMPSE,
MIPSGAL) and literature.
Objects:
--------------------------------------------
RA (2000) DE Designation(s)
--------------------------------------------
17 19 58.0 -35 57 47 NGC 6334 = Kes 49
17 24 18. -34 20 NGC 6357 = Kes 53
--------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 56 163 Properties of dense cores detected in
NGC 6334-NGC 6357
tablea1.dat 89 56 24 microns flux and signpost of stellar activity
list.dat 49 519 List of FITS file
sp/* . 519 Individual fits files
--------------------------------------------------------------------------------
See also:
II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Core Core number
5- 20 A16 --- Name Core name (JHHMMSS.S+DDMMSS)
22- 26 I5 mJy Speak Peak flux density at 1.2mm (in mJy/beam)
28- 31 F4.2 pc FWHM1 Deconvolved FWHM size
33 A1 --- --- [x]
35- 38 F4.2 pc FWHM2 Deconvolved FWHM size
40- 44 I5 mJy Sint Integrated flux density at 1.2mm
46- 49 I4 Msun Mass ?=- Free-free corrected mass
51- 56 E6.2 cm-3 <nH2> ?=- Free-free corrected density
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Core Core number
5- 12 F8.3 Jy S24um ? Spitzer/MIPS 24 microns flux
14- 17 F4.1 arcsec Dist ? Distance between MIPS sources and
SIMBA core
20- 57 A38 --- Name Maser/HII region association (1)
61- 77 A17 --- GLIMPSE GLIMPSE catalogue identification (SSTGLMA)
79- 83 F5.3 mag [5.8]-[8.0] ? IRAC [5.8]-[8.0] color index
85- 89 F5.3 mag [3.6]-[4.5] ? IRAC [3.6]-[4.5] color index
--------------------------------------------------------------------------------
Note (1): Radio sources in parenthesis indicate that the core is at the
border of the radio source but not considered as associated.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Core Core number
5- 18 A14 --- FileName Name of the FITS file in subdirectory sp
19- 49 A31 --- Title Title of the file
--------------------------------------------------------------------------------
Acknowledgements:
Delphine Russeil, delphine.russeil(at)oamp.fr
(End) Patricia Vannier [CDS] 25-Feb-2010