J/A+A/588/A131 Warm ISM in the Sagittarius A Complex (Garcia+, 2016)
Warm ISM in the Sagittarius A Complex.
I. Mid-J CO, atomic carbon, ionized atomic carbon, and ionized nitrogen
sub-mm/FIR line observations with the Herschel-HIFI and NANTEN2/SMART
telescopes.
Garcia P., Simon R., Stutzki J., Gusten R., Requena-Torres M.A., Higgins R.
<Astron. Astrophys. 588, A131 (2016)>
=2016A&A...588A.131G 2016A&A...588A.131G (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Galaxies, Seyfert ; Carbon monoxide ;
Atomic physics
Keywords: ISM: atoms - ISM: molecules - ISM: clouds - Galaxy: center
Abstract:
We investigate the spatial and spectral distribution of the local
standard of rest (LSR) velocity resolved submillimetre emission from
the warm (25-90K) gas in the Sgr A Complex, located in the Galactic
centre. We present large-scale submillimetre heterodyne observations
towards the Sgr A Complex covering ∼300-arcmin2. These data were
obtained in the frame of the Herschel EXtraGALactic guaranteed time
key program (HEXGAL) with the Herschel-HIFI satellite and are
complemented with submillimetre observations obtained with the
NANTEN2/SMART telescope as part of the NANTEN2/SMART Central Nuclear
Zone Survey. The observed species are CO(J=4-3) at 461.0GHz observed
with the NANTEN2/SMART telescope, and [CI] 3P1-3P0 at 492.2GHz, [CI]
3P2-3P1 at 809.3GHz, [NII] 3P1-3P0 at 1461.1GHz, and [CII] 2P3/2-2P1/2
at 1900.5GHz observed with the Herschel-HIFI satellite.
The observations are presented in a 1km/s spectral resolution and
a spatial resolution ranging from 46-arcsec to 28-arcsec. The spectral
coverage of the three lower frequency lines is ±200km/s, while in
the two high frequency lines, the upper LSR velocity limit is +94km/s
and +145km/s for the [NII] and [CII] lines, respectively. The spatial
distribution of the emission in all lines is very widespread. The bulk
of the carbon monoxide emission is found towards Galactic latitudes
below the Galactic plane, and all the known molecular clouds are
identified. Both neutral atomic carbon lines have their brightest
emission associated with the +50km/s cloud. Their spatial
distribution at this LSR velocity describes a crescent-shape
structure, which is probably the result of interaction with the
energetic event (one or several supernovae explosions) that gave
origin to the non-thermal Sgr A-East source.
The [CII] and [NII] emissions have most of their flux associated with
the thermal arched-filaments and the H region and bright spots in
[CII] emission towards the central nuclear disk (CND) are detected.
Warm Gas at very high (|Vlsr|>100km/s) LSR velocities is also
detected towards the line of sight to the Sgr A Complex, and it is
most probably located outside the region, in the X1 orbits.
Description:
Files contain the observations of CI 1-0 and CI 2-1, NII 1-0, and
CII 3/2-1/2 observed with Herschel-HIFI and 12CO 4-3 observed with
NANTEN2/SMART telescope of the SgrA Complex in the GC. The data
analysis was done via GILDAS-CLASS, where raw data are processed to
obtain regularly sampled data.
************************* IMPORTANT NOTE ************************
These data sets have been blocked until 31.12.16 as agreed on with
the A&A Editor. Access to channel maps of all observed transitions
is immediately available in electronic format in the link provided
in the paper,
https://www.astro.uni-koeln.de/online-data/Garcia_P_SgrA_AA588/.
For contact information refer to
Dr. Pablo Garcia
e-mail:
*******************************************************************
Available here on 03-Jan-2017.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 122 5 *List of fits data cubes
(available after 31/12/2016)
fits/* . 5 Individual fits datacubes
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Note on list.dat: These data sets will be blocked until 31.12.16 as agreed on
with the A&A Editor. Access to channel maps of all observed transitions
is immediately available in electronic format via the link provided
in the paper,
https://www.astro.uni-koeln.de/online-data/Garcia_P_SgrA_AA588/
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 22 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 31 I4 --- Nz Number of slices
33- 42 E10.4 km/s bVRAD Lower value of radial velocity interval
44- 52 E9.4 km/s BVRAD Upper value of radial velocity interval
54 I1 km/s dVRAD [1] Velocity resolution
56- 57 I2 arcsec Res [28/46] Spatial resolution
59- 64 I6 Kibyte size [22733/150711] Size of FITS file
66- 93 A28 --- FileName Name of FITS file in subdirectory fits (1)
95-122 A28 --- Title Title of the FITS file
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Note (1): File names are self explanatory, i.e.,
SGRATRANSITIONCOORDINATESYSTEMSPATIALRESOLUTIONVELOCITYRESOLUTION.fits
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Acknowledgements:
Pablo Garcia, pgarcia(at)iram.es
History:
* 03-Jan-2017 : fits datacube added
(End) Pablo Garcia [IRAM], Patricia Vannier [CDS] 31-Mar-2016