First NH3 detection of the Orion Bar

被引：31

作者：

Larsson, B

Liseau, R

Bergman, P

Bernath, P

Black, JH

Booth, RS

Buat, V

Curry, CL

Encrenaz, P

Falgarone, E

Feldman, P

Fich, M

Florén, HG

Frisk, U

Gerin, M

Gregersen, EM

Harju, J

Hasegawa, T

Johansson, LEB

Kwok, S

Lecacheux, A

Liljeström, T

Mattila, K

Mitchell, GF

Nordh, LH

Olberg, M

Olofsson, G

Pagani, L

Plume, R

Ristorcelli, I

Sandqvist, A

von Schéele, F

Tothill, NFH

Volk, K

Wilson, CD

Hjalmarson, Ä

机构：

[1] SCFAB, Stockholm Observ, S-10691 Stockholm, Sweden

[2] Onsala Space Observ, S-43992 Onsala, Sweden

[3] Univ Waterloo, Dept Phys, Waterloo, ON N2L 3G1, Canada

[4] Astron Spatiale Lab, F-13376 Marseille 12, France

[5] Observ Paris, LERMA, F-75014 Paris, France

[6] Observ Paris, CNRS, FRE 2460, F-75014 Paris, France

[7] Ecole Normale Super, CNRS, FRE 2460, F-75005 Paris, France

[8] Ecole Normale Super, LERMA, F-75005 Paris, France

[9] Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada

[10] Swedish Space Corp, S-17104 Solna, Sweden

[11] Univ Helsinki Observ, Helsinki 00014, Finland

[12] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada

[13] Observ Paris, Sect Meudon, LESIA, F-92195 Meudon, France

[14] Helsinki Univ Technol, Mesahovi Radio Observ, FIN-02150 Espoo, Finland

[15] St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada

[16] Swedish Natl Space Board, S-17104 Solna, Sweden

[17] Ctr Etud Spatiale Rayonnements, F-31029 Toulouse, France

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 402卷 / 03期

关键词：

ISM : individual objects : Orion A; clouds; molecules; abundances; stars : formation;

D O I：

10.1051/0004-6361:20030342

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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).

引用

页码：L69 / L72

页数：4

共 18 条

[1] MICROWAVE-SPECTRUM OF N-14H3 IN V=000DEGREES1 STATE [J].