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Odin observations o...
Odin observations of ammonia in the SgrA+50 km s(-1) cloud and circumnuclear disk
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- Sandqvist, Aage (author)
- Stockholms universitet,Institutionen för astronomi
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- Hjalmarson, Åke, 1939 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Frisk, U. (author)
- Omnisys Instruments AB
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- Lundin, S. (author)
- OHB AG Group
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- Nordh, L. (author)
- Stockholm Univ, AlbaNova Univ Ctr, Stockholm Observ, S-10691 Stockholm, Sweden
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- Olberg, Michael, 1956 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Olofsson, Göran (author)
- Stockholms universitet,Institutionen för astronomi
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Sandqvist, Aa. (author)
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(creator_code:org_t)
- 2017-03-14
- 2017
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 599
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Abstract
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- Context. 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.Aims. To study the presence of NH3 in the Galactic centre and spiral arms.Methods. Recently, Odin has made complementary observations of the 572 GHz NH3 line towards the SgrA + 50 km s(-1) cloud and circumnuclear disk (CND).Results. Significant NH3 emission has been observed in both the + 50 km s(-1) cloud and the CND. Clear NH3 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.Conclusions. The very large velocity width (80 km s 1) of the NH3 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 H2O in shocks / outflows.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Galaxy: center
- ISM: individual objects: Sgr A
- ISM: molecules
- ISM: clouds
Publication and Content Type
- ref (subject category)
- art (subject category)
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Sandqvist, Aage
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Hjalmarson, Åke, ...
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Frisk, U.
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Lundin, S.
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Nordh, L.
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Olberg, Michael, ...
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Olofsson, Göran
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Sandqvist, Aa.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Astronomy and As ...
- By the university
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Stockholm University
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Chalmers University of Technology