J/A+A/599/A135 NH_3_ Odin observations towards Sgr A (Sandqvist+, 2017) ================================================================================ Odin observations of ammonia in the Sgr A +50 km/s cloud and circumnuclear disk. Sandqvist Aa., Hjalmarson A., Frisk U., Lundin S., Nordh L., Olberg M., Olofsson G. =2017A&A...599A.135S (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Interstellar medium ; Molecular clouds ; Radio lines Keywords: Galaxy: centre - ISM: individual objects: Sgr A - ISM: molecules - ISM: clouds Abstract: The Odin satellite is now into its sixteenth year of operation, much surpassing its design life of two years. One of the sources which Odin has observed in great detail is the Sgr A Complex in the centre of the Milky Way. The aim is to study the presence of NH_3_ in the Galactic Centre and spiral arms. Recently, Odin has made complementary observations of the 572GHz NH_3_ line towards the Sgr A +50km/s cloud and Circumnuclear Disk (CND). Significant NH_3_ emission has been observed in both the +50km/s cloud and the CND. Clear NH_3_ absorption has also been detected in many of the spiral arm features along the line of sight from the Sun to the core of our Galaxy. The very large velocity width (80km/s) of the NH_3_ emission associated with the shock region in the southwestern part of the CND may suggest a formation/desorption scenario similar to that of gas-phase H_2_O in shocks/outflows. Description: 50nh3cds.fit (Fig. 1 in paper). Odin observations of the 572GHz NH_3_ line towards the Sgr A +50km/s Cloud (J2000.0 17:45:51.7, -28:59:09the channel resolution is 1.6km/s. cndnh3cd.fit (Fig. 2 in paper). Odin observations of the 572GHz NH_3_ line towards the south-western part of the Sgr A Circumnuclear Disk (J2000.0 17:45:39.7, -29:01:18); the channel resolution is 1.6km/s. cndh218o.fit (Fig. 3 in paper). Odin observations of the 548GHz H_2_^18^O line towards the southwestern part of the Sgr A Circumnuclear Disk (J2000.0 17:45:39.7, -29:01:18); the channel resolution is 3km/s. Objects: ------------------------------------------------ RA (2000) DE Designation(s) ------------------------------------------------ 17 45 40.04 -29 00 28.2 Sgr A = NAME Sgr A* ------------------------------------------------ File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file list.dat 182 3 List of fits spectra fits/* . 3 Individual fits spectra -------------------------------------------------------------------------------- See also: J/other/Sci/348.413 : Sgr A East SNR multiwavelength images (Lau+, 2015) J/ApJ/802/69 : VLA, ALMA and SMA monitoring of Sgr A* (Bower+, 2015) J/A+A/589/A116 : Multiwavelength study of Sgr A* (Mossoux+, 2016) 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- 22 I3 --- Nx Number of pixels along X-axis 24- 34 E11.7 Hz bFreq Lower value of interval frequency 36- 46 E11.7 Hz BFreq Upper value of interval frequency 48- 58 E11.7 Hz dFreq Frequency resolution 60 I1 Kibyte size Size of FITS file 62- 73 A12 --- FileName Name of FITS file, in subdirectory fits 75-183 A109 --- Title Title of the FITS file -------------------------------------------------------------------------------- Acknowledgements: Aage Sandqvist, aage(at)astro.su.se References: Karlsson et al., 2013A&A...554A.141K, Hydroxyl, water, ammonia, carbon monoxide, and neutral carbon towards the Sagittarius A complex. VLA, Odin, and SEST observations. ================================================================================ (End) Aage Sandqvist [Stockholm Obs.], Patricia Vannier [CDS] 10-Feb-2017