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
arXiv:astro-ph/0303132 · doi:10.1051/0004-6361:20030343
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 (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) = 3e-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) = 8e-10.
4 pages, 2 figures, 2 tables, to appear in Astron. Astrophys. Letters
Cited by in corpus (15)
- Molecular oxygen in the rho Ophiuchi cloud
- The Initial Conditions of Clustered Star Formation I: NH3 Observations of Dense Cores in Ophiuchus
- Detection of interstellar hydrogen peroxide
- On the robustness of the ammonia thermometer
- Nitrogen hydrides in interstellar gas II. Analysis of Herschel/HIFI observations towards W49N and G10.6-0.4 (W31C)
- A spectral line survey of Orion KL in the bands 486-492 and 541-577 GHz with the Odin satellite II. Data analysis
- Deuterated formaldehyde in rho Ophiuchi A
- The JCMT Legacy Survey of the Gould Belt: a molecular line study of the Ophiuchus molecular cloud
- Dust as interstellar catalyst - II. How chemical desorption impacts the gas
- Tracing the cold and warm physico-chemical structure of deeply embedded protostars: IRAS 16293-2422 versus VLA 1623-2417
- NH_3(1_0-0_0) in the pre-stellar core L1544
- Submillimeter water and ammonia absorption by the peculiar z~0.89 interstellar medium in the gravitational lens of the PKS 1830-211 system
- New optical spectra and general discussion on the nature of ULX's
- Gas and dust in the star-forming region rho Oph A: II. The gas in the PDR and in the dense cores
- Water and ammonia abundances in S140 with the Odin satellite