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J/A+A/606/A123           Molecular maps of NGC1333                (Hacar+, 2017)

Fibers in the NGC1333 proto-cluster. Hacar A., Tafalla M., Alves J. <Astron. Astrophys. 606, A123 (2017)> =2017A&A...606A.123H (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Molecular clouds ; Radio lines ; Clusters, open Keywords: ISM: clouds - ISM: kinematics and dynamics - ISM: structure - Stars: formation - Submillimeter: ISM Abstract: Are the initial conditions for clustered star formation the same as for non-clustered star formation? To investigate the initial gas properties in young proto-clusters we carried out a comprehensive and high-sensitivity study of the internal structure, density, temperature, and kinematics of the dense gas content of the NGC1333 region in Perseus, one of the nearest and best studied embedded clusters. The analysis of the gas velocities in the Position-Position-Velocity space reveals an intricate underlying gas organization both in space and velocity. We identified a total of 14 velocity-coherent, (tran-)sonic structures within NGC1333, with similar physical and kinematic properties than those quiescent, star-forming (aka fertile) fibers previously identified in low-mass star-forming clouds. These fibers are arranged in a complex spatial network, build-up the observed total column density, and contain the dense cores and protostars in this cloud. Our results demonstrate that the presence of fibers is not restricted to low-mass clouds but can be extended to regions of increasing mass and complexity. We propose that the observational dichotomy between clustered and non-clustered star-forming regions might be naturally explained by the distinct spatial density of fertile fibers in these environments. Description: Molecular observations in the NGC1333 proto-clusters: - N2H+(1-0) IRAM30m observations (resolution=30 arcsec) - NH3(1,1) Effelsberg100m observations (resolution=60 arcsec) - NH3(2,2) Effelsberg100m observations (resolution=60 arcsec) Data are provided in both FITS and CLASS formats. Objects: ----------------------------------------- RA (2000) DE Designation(s) ----------------------------------------- 03 28 55 +31 22.2 NGC1333 = NGC 1333 ----------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file list.dat 175 3 list of datacubes fits/* 0 3 Individudal datacubes in FITS class/* 0 3 Individudal datacubes in CLASS
See also: J/PAZh/27/403 : CCD R photometry in the UMa supercluster (Kopylova+, 2001) Byte-by-byte Description of file: list.dat
Bytes Format Units Label Explanations
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000) 10- 18 F9.5 deg DEdeg Declination of center (J2000) 20- 21 I2 --- Nx Number of pixels along X-axis 23- 25 I3 --- Ny Number of pixels along Y-axis 27- 30 I4 --- Nz Number of slices 32- 39 F8.1 m/s bVRAD Lower value of VRAD interval 41- 47 F7.1 m/s BVRAD Upper value of VRAD interval 49- 55 F7.4 m/s dVRAD Radial velocity resolution 57- 61 I5 Kibyte size Size of FITS file 63- 94 A32 --- FileName Name of FITS file, in subdirectory fits 96-150 A55 --- Title Title of the FITS file 152-175 A24 --- FileName2 Name of the CLASS file, in subdirectory class
Acknowledgements: Alvaro Hacar, hacar(at)strw.leidenuniv.nl
(End) Alvaro Hacar [Leiden obs., NL], Patricia Vannier [CDS] 24-Oct-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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