By the same authors

From the same journal

First NH3 detection of the Orion Bar

Research output: Contribution to journalArticlepeer-review

Published copy (DOI)

Author(s)

  • B Larsson
  • R Liseau
  • P Bergman
  • J H Black
  • R S Booth
  • V Buat
  • C L Curry
  • P Encrenaz
  • E Falgarone
  • P Feldman
  • M Fich
  • H G Floren
  • U Frisk
  • M Gerin
  • E M Gregersen
  • J Harju
  • T Hasegawa
  • L E B Johansson
  • S Kwok
  • A Lecacheux
  • T Liljestrom
  • K Mattila
  • G F Mitchell
  • L H Nordh
  • M Olberg
  • G Olofsson
  • L Pagani
  • R Plume
  • I Ristorcelli
  • A Sandqvist
  • F von Scheele
  • N F H Tothill
  • K Volk
  • C D Wilson
  • A Hjalmarson

Department/unit(s)

Publication details

JournalAstronomy & Astrophysics
DatePublished - May 2003
Issue number3
Volume402
Number of pages4
Pages (from-to)L69-L72
Original languageEnglish

Abstract

Odin has successfully observed three regions in the OrionA cloud, i.e. OriKL, Ori S and the Orion Bar, in the 572.5 GHz rotational ground state line of ammonia, ortho-NH3 (J; K) = ( 1; 0) --> (0; 0), and the result for the Orion Bar represents the first detection in an ammonia line. Several velocity components are present in the data. Specifically, the observed line profile from the Orion Bar can be decomposed into two components, which are in agreement with observations in high-J CO lines by Wilson et al. (2001). Using the source model for the Orion Bar by these authors, our Odin observation implies a total ammonia abundance of NH3/H-2 = 5 X 10(-9).

    Research areas

  • ISM : individual objects : Orion A, clouds, molecules, abundances, stars : formation, INTERSTELLAR AMMONIA, SCALE STRUCTURE, EMISSION, REGION, STATE, KL

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