First detection of NH3 (1(0) -> 0(0)) from a low mass cloud core - On the low ammonia abundance of the rho 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; A  Sandqvist; F  von Scheele; G S  Serra; N  Tothill; K  Volk; C  Wilson

doi:10.1051/0004-6361:20030343

First detection of NH3 (1(0) -> 0(0)) from a low mass cloud core - On the low ammonia abundance of the rho 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, A Sandqvist, F von Scheele, G S Serra, N Tothill, K Volk, C Wilson

Chemistry

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

Abstract

Odin has successfully observed the molecular core rho Oph A in the 572.5 GHz rotational ground state line of ammonia, NH3 (J(K) = 1(0) --> 0(0)). The interpretation of this result makes use of complementary molecular line data obtained from the ground ((CO)-O-17 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 X 10(-9). Unless NH3 is not entirely segregated from (CO)-O-17 and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3) = 8 X 10(-10).

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

Keywords

ISM : individual objects : rho OphA
clouds
molecules
stars : formation
INTERSTELLAR AMMONIA
ROTATIONAL-EXCITATION
METHANOL
SUBMILLIMETER
TRANSITIONS
HELIUM
STATE

Access to Document

10.1051/0004-6361:20030343

Cite this

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 (1(0) -> 0(0)) from a low mass cloud core - On the low ammonia abundance of the rho Oph A core. Astronomy & Astrophysics, 402(3), L73-L76. https://doi.org/10.1051/0004-6361:20030343

@article{d0f533c6addd4de5a18c13dc63212046,

title = "First detection of NH3 (1(0) -> 0(0)) from a low mass cloud core - On the low ammonia abundance of the rho Oph A core",

abstract = "Odin has successfully observed the molecular core rho Oph A in the 572.5 GHz rotational ground state line of ammonia, NH3 (J(K) = 1(0) --> 0(0)). The interpretation of this result makes use of complementary molecular line data obtained from the ground ((CO)-O-17 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 X 10(-9). Unless NH3 is not entirely segregated from (CO)-O-17 and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3) = 8 X 10(-10).",

keywords = "ISM : individual objects : rho OphA, clouds, molecules, stars : formation, INTERSTELLAR AMMONIA, ROTATIONAL-EXCITATION, METHANOL, SUBMILLIMETER, TRANSITIONS, HELIUM, STATE",

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 A Sandqvist and {von Scheele}, F and Serra, {G S} and N Tothill and K Volk and C Wilson",

year = "2003",

month = may,

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

language = "English",

volume = "402",

pages = "L73--L76",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "3",

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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, von Scheele, F, Serra, GS, Tothill, N, Volk, K & Wilson, C 2003, 'First detection of NH3 (1(0) -> 0(0)) from a low mass cloud core - On the low ammonia abundance of the rho Oph A core', Astronomy & Astrophysics, vol. 402, no. 3, pp. L73-L76. https://doi.org/10.1051/0004-6361:20030343

TY - JOUR

T1 - First detection of NH3 (1(0) -> 0(0)) from a low mass cloud core - On the low ammonia abundance of the rho 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, A

AU - von Scheele, F

AU - Serra, G S

AU - Tothill, N

AU - Volk, K

AU - Wilson, C

PY - 2003/5

Y1 - 2003/5

N2 - Odin has successfully observed the molecular core rho Oph A in the 572.5 GHz rotational ground state line of ammonia, NH3 (J(K) = 1(0) --> 0(0)). The interpretation of this result makes use of complementary molecular line data obtained from the ground ((CO)-O-17 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 X 10(-9). Unless NH3 is not entirely segregated from (CO)-O-17 and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3) = 8 X 10(-10).

AB - Odin has successfully observed the molecular core rho Oph A in the 572.5 GHz rotational ground state line of ammonia, NH3 (J(K) = 1(0) --> 0(0)). The interpretation of this result makes use of complementary molecular line data obtained from the ground ((CO)-O-17 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 X 10(-9). Unless NH3 is not entirely segregated from (CO)-O-17 and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3) = 8 X 10(-10).

KW - ISM : individual objects : rho OphA

KW - clouds

KW - molecules

KW - stars : formation

KW - INTERSTELLAR AMMONIA

KW - ROTATIONAL-EXCITATION

KW - METHANOL

KW - SUBMILLIMETER

KW - TRANSITIONS

KW - HELIUM

KW - STATE

U2 - 10.1051/0004-6361:20030343

DO - 10.1051/0004-6361:20030343

M3 - Article

SN - 0004-6361

VL - 402

SP - L73-L76

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

IS - 3

ER -