J/A+A/564/A99 Chamaeleon-MMS1 NH3 (1,1) and (2,2) maps (Vaisala+, 2014)
High-resolution ammonia mapping of the very young protostellar core
Chamaeleon-MMS1.
Vaisala M.S., Harju J., Mantere M.J., Miettinen O., Sault R.S.,
Walmsley C.M., Whiteoak J.B.
<Astron. Astrophys. 564, A99 (2014)>
=2014A&A...564A..99V 2014A&A...564A..99V
ADC_Keywords: YSOs ; Radio lines
Keywords: stars: formation - stars: protostars -
ISM: individual objects: Cha-MMS1 - ISM: jets and outflows -
radio continuum: ISM - radio lines: ISM
Abstract:
The aim of this study is to investigate the structure and kinematics
of the nearby candidate first hydrostatic core Cha-MMS1.
Cha-MMS1 was mapped in the NH3(1,1) line and the 1.2cm continuum
using the Australia Telescope Compact Array, ATCA. The angular
resolution of the ATCA observations is 7" (∼1000AU), and the velocity
resolution is 50m/s. The core was also mapped with the 64-m
Parkes telescope in the NH3(1,1) and (2,2) lines. Observations from
Herschel Space Observatory and Spitzer Space telescope were used to
help interpretation. The ammonia spectra were analysed using Gaussian
fits to the hyperfine structure. A two-layer model was applied in the
central parts of the core where the ATCA spectra show signs of
self-absorption.
Description:
All files are in the FITS format with headers containing the necessary
information on astrometry, spectral resolution, and the intensity
scale. The Herschel and Spitzer Space Telescope maps are extracted
from archival data available at the Herschel Science Archive
(http://herschel.esac.esa.int/Science_Archive.shtml) and Spitzer
Heritage Archive
(http://sha.ipac.caltech.edu/applications/Spitzer/SHA). The LABOCA map
of Cha-MMS1 is part the large-scale map of Chamaeleon I published in
Belloche et al., 2011, Cat. J/A+A/527/A145 .
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
11 06 32 -77 23.7 Cha-MMS1 = [RNC96] Cha-MMS 1
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 162 14 List of images and data cube
img/* . 14 Data cube and images in FITS format
spectra.dat 107 86 List of spectra
sp/* . 86 Individual FITS spectra
--------------------------------------------------------------------------------
See also:
J/A+A/527/A145 : Chamaeleon I 870um sources (Belloche+, 2011)
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- 23 F4.2 arcsec/pix Scale [1/6.1] Scale of the image
25- 27 I3 pix Nx [22/181] Number of pixels along X-axis
28 A1 --- --- [x]
29- 31 I3 pix Ny [22/181] Number of pixels along Y-axis
32 A1 --- --- [x]
33- 35 I3 pix Nz [861]? Number of slices
37- 43 F7.4 GHz Freq ? Frequency of line
48- 52 F5.1 km/s VLSRl ? Lower value of LSR velocity interval
54- 58 F5.1 km/s VLSRu ? Upper value of LSR velocity interval
61- 62 I2 m/s dVLSR ? Resolution in lRS velocity
64- 68 I5 Kibyte size [11/66890] Size of FITS file
70-113 A44 --- FileName Name of FITS file in subdirectory img
115-162 A48 --- Title Title of the file
--------------------------------------------------------------------------------
Byte-by-byte Description of file: spectra.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.4 deg RAdeg Right Ascension of center (J2000)
9- 16 F8.4 deg DEdeg Declination of center (J2000)
18- 20 I3 pix Nx Number of points
22- 28 F7.4 GHz Freq [23.3692] Line rest frequency
33- 34 I2 Kibyte size [11] Size of FITS file
36- 67 A32 --- FileName Name of FITS file in subdirectory sp
69-107 A39 --- Title Title of the file
--------------------------------------------------------------------------------
Acknowledgements:
Miikka Vaisala, miikka.vaisala(at)helsinki.fi
(End) Patricia Vannier [CDS] 01-Apr-2014