First detection of NH₃(1₀ → 0₀) from a low mass cloud core*,** : on the low ammonia abundance of the ρ Oph A core

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

doi:10.1051/0004-6361:20030343

First detection of NH₃(1₀ → 0₀) from a low mass cloud core*,** : on the low ammonia abundance of the ρ Oph A core

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

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

Abstract

Odin has successfully observed the molecular core ρ Oph A in the 572.5 GHz rotational ground state line of ammonia, NH3 (JK = 10 → 00). The interpretation of this result makes use of complementary molecular line data obtained from the ground (C17O and CH3OH) as part of the Odin preparatory work. Comparison of these observations with theoretical model calculations of line excitation and transfer yields a quite ordinary abundance of methanol, X(CH3OH) = 3 Ã 10-9. Unless NH3 is not entirely segregated from C17O and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3) = 8 Ã 10-10.

Original language	English
Pages (from-to)	L73-L76
Number of pages	4
Journal	Astronomy and Astrophysics
Volume	402
Issue number	3
DOIs	https://doi.org/10.1051/0004-6361:20030343
Publication status	Published - 2003

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Liseau, R., Larsson, B., Brandeker, A., Bergman, P., Bernath, P., Black, J. H., Booth, R., Buat, V., Curry, C., Encrenaz, P., Falgarone, E., Feldman, P., Fich, M., Floren, H., Frisk, U., Gerin, M., Gregersen, E., Harju, J., Hasegawa, T., ... Wilson, C. (2003). First detection of NH₃(1₀ → 0₀) from a low mass cloud core*,** : on the low ammonia abundance of the ρ Oph A core. Astronomy and Astrophysics, 402(3), L73-L76. https://doi.org/10.1051/0004-6361:20030343

@article{a406457395e54223a8fe7d35b4622ee9,

title = "First detection of NH₃(1₀ → 0₀) from a low mass cloud core*,** : on the low ammonia abundance of the ρ Oph A core",

abstract = "Odin has successfully observed the molecular core ρ Oph A in the 572.5 GHz rotational ground state line of ammonia, NH3 (JK = 10 → 00). The interpretation of this result makes use of complementary molecular line data obtained from the ground (C17O and CH3OH) as part of the Odin preparatory work. Comparison of these observations with theoretical model calculations of line excitation and transfer yields a quite ordinary abundance of methanol, X(CH3OH) = 3 {\~A} 10-9. Unless NH3 is not entirely segregated from C17O and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3) = 8 {\~A} 10-10.",

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

year = "2003",

doi = "10.1051/0004-6361:20030343",

language = "English",

volume = "402",

pages = "L73--L76",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "3",

}

Liseau, R, Larsson, B, Brandeker, A, Bergman, P, Bernath, P, Black, JH, Booth, R, Buat, V, Curry, C, Encrenaz, P, Falgarone, E, Feldman, P, Fich, M, Floren, H, Frisk, U, Gerin, M, Gregersen, E, Harju, J, Hasegawa, T, Hjalmarson, A, Johansson, L, Kwok, S, Lecacheux, A, Liljestrom, T, Mattila, K, Mitchell, G, Nordh, L, Olberg, M, Olofsson, G, Pagani, L, Plume, R, Ristorcelli, I, Sandqvist, A, Scheele, FV, Serra, G, Tothill, N, Volk, K & Wilson, C 2003, 'First detection of NH₃(1₀ → 0₀) from a low mass cloud core*,** : on the low ammonia abundance of the ρ Oph A core', Astronomy and Astrophysics, vol. 402, no. 3, pp. L73-L76. https://doi.org/10.1051/0004-6361:20030343

TY - JOUR

T1 - First detection of NH₃(1₀ → 0₀) from a low mass cloud core*,** : on the low ammonia abundance of the ρ Oph A core

AU - Liseau, R.

AU - Larsson, B.

AU - Brandeker, A.

AU - Bergman, P.

AU - Bernath, P.

AU - Black, J. H.

AU - Booth, R.

AU - Buat, V.

AU - Curry, C.

AU - Encrenaz, P.

AU - Falgarone, E.

AU - Feldman, P.

AU - Fich, M.

AU - Floren, H.

AU - Frisk, U.

AU - Gerin, M.

AU - Gregersen, E.

AU - Harju, J.

AU - Hasegawa, T.

AU - Hjalmarson, A.

AU - Johansson, L.

AU - Kwok, S.

AU - Lecacheux, A.

AU - Liljestrom, T.

AU - Mattila, K.

AU - Mitchell, G.

AU - Nordh, L.

AU - Olberg, M.

AU - Olofsson, G.

AU - Pagani, L.

AU - Plume, R.

AU - Ristorcelli, I.

AU - Sandqvist, Aa.

AU - Scheele, F. v.

AU - Serra, G.

AU - Tothill, N.

AU - Volk, K.

AU - Wilson, C.

PY - 2003

Y1 - 2003

N2 - Odin has successfully observed the molecular core ρ Oph A in the 572.5 GHz rotational ground state line of ammonia, NH3 (JK = 10 → 00). The interpretation of this result makes use of complementary molecular line data obtained from the ground (C17O and CH3OH) as part of the Odin preparatory work. Comparison of these observations with theoretical model calculations of line excitation and transfer yields a quite ordinary abundance of methanol, X(CH3OH) = 3 Ã 10-9. Unless NH3 is not entirely segregated from C17O and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3) = 8 Ã 10-10.

AB - Odin has successfully observed the molecular core ρ Oph A in the 572.5 GHz rotational ground state line of ammonia, NH3 (JK = 10 → 00). The interpretation of this result makes use of complementary molecular line data obtained from the ground (C17O and CH3OH) as part of the Odin preparatory work. Comparison of these observations with theoretical model calculations of line excitation and transfer yields a quite ordinary abundance of methanol, X(CH3OH) = 3 Ã 10-9. Unless NH3 is not entirely segregated from C17O and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3) = 8 Ã 10-10.

UR - http://hdl.handle.net/1959.7/uws:23283

U2 - 10.1051/0004-6361:20030343

DO - 10.1051/0004-6361:20030343

M3 - Article

SN - 0004-6361

VL - 402

SP - L73-L76

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

First detection of NH₃(1₀ → 0₀) from a low mass cloud core*,** : on the low ammonia abundance of the ρ Oph A core

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