First NH3 detection of the Orion Bar

B  Larsson; R  Liseau; P  Bergman; P  Bernath; 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

doi:10.1051/0004-6361:20030342

First NH3 detection of the Orion Bar

B Larsson, R Liseau, P Bergman, P Bernath, 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 KwokA 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

Chemistry

Research output: Contribution to journal › Article › peer-review

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).

Original language	English
Pages (from-to)	L69-L72
Number of pages	4
Journal	Astronomy & Astrophysics
Volume	402
Issue number	3
DOIs	https://doi.org/10.1051/0004-6361:20030342
Publication status	Published - May 2003

Keywords

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

Access to Document

10.1051/0004-6361:20030342

Cite this

Larsson, B., Liseau, R., Bergman, P., Bernath, P., Black, J. H., Booth, R. S., Buat, V., Curry, C. L., Encrenaz, P., Falgarone, E., Feldman, P., Fich, M., Floren, H. G., Frisk, U., Gerin, M., Gregersen, E. M., Harju, J., Hasegawa, T., Johansson, L. E. B., ... Hjalmarson, A. (2003). First NH3 detection of the Orion Bar. Astronomy & Astrophysics, 402(3), L69-L72. https://doi.org/10.1051/0004-6361:20030342

@article{8089922fb9d34e20ac7a946bcea0187b,

title = "First NH3 detection of the Orion Bar",

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).",

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

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

year = "2003",

month = may,

doi = "10.1051/0004-6361:20030342",

language = "English",

volume = "402",

pages = "L69--L72",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "3",

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Larsson, B, Liseau, R, Bergman, P, Bernath, P, Black, JH, Booth, RS, Buat, V, Curry, CL, Encrenaz, P, Falgarone, E, Feldman, P, Fich, M, Floren, HG, Frisk, U, Gerin, M, Gregersen, EM, Harju, J, Hasegawa, T, Johansson, LEB, Kwok, S, Lecacheux, A, Liljestrom, T, Mattila, K, Mitchell, GF, Nordh, LH, Olberg, M, Olofsson, G, Pagani, L, Plume, R, Ristorcelli, I, Sandqvist, A, von Scheele, F, Tothill, NFH, Volk, K, Wilson, CD & Hjalmarson, A 2003, 'First NH3 detection of the Orion Bar', Astronomy & Astrophysics, vol. 402, no. 3, pp. L69-L72. https://doi.org/10.1051/0004-6361:20030342

TY - JOUR

T1 - First NH3 detection of the Orion Bar

AU - Larsson, B

AU - Liseau, R

AU - Bergman, P

AU - Bernath, P

AU - Black, J H

AU - Booth, R S

AU - Buat, V

AU - Curry, C L

AU - Encrenaz, P

AU - Falgarone, E

AU - Feldman, P

AU - Fich, M

AU - Floren, H G

AU - Frisk, U

AU - Gerin, M

AU - Gregersen, E M

AU - Harju, J

AU - Hasegawa, T

AU - Johansson, L E B

AU - Kwok, S

AU - Lecacheux, A

AU - Liljestrom, T

AU - Mattila, K

AU - Mitchell, G F

AU - Nordh, L H

AU - Olberg, M

AU - Olofsson, G

AU - Pagani, L

AU - Plume, R

AU - Ristorcelli, I

AU - Sandqvist, A

AU - von Scheele, F

AU - Tothill, N F H

AU - Volk, K

AU - Wilson, C D

AU - Hjalmarson, A

PY - 2003/5

Y1 - 2003/5

N2 - 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).

AB - 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).

KW - ISM : individual objects : Orion A

KW - clouds

KW - molecules

KW - abundances

KW - stars : formation

KW - INTERSTELLAR AMMONIA

KW - SCALE STRUCTURE

KW - EMISSION

KW - REGION

KW - STATE

KW - KL

U2 - 10.1051/0004-6361:20030342

DO - 10.1051/0004-6361:20030342

M3 - Article

SN - 0004-6361

VL - 402

SP - L69-L72

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

IS - 3

ER -