High-resolution observations of interstellar CH and CH+ towards the Scorpius OB1 association
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چکیده
منابع مشابه
Constraining the Environment of Ch+ Formation with Ch+ 3 Observations
The formation of CH+ in the interstellar medium (ISM) has long been an outstanding problem in chemical models. In order to probe the physical conditions of the ISM in which CH+ forms, we propose the use of CH3 observations. The pathway to forming CH + 3 begins with CH +, and a steady-state analysis of CH3 and the reaction intermediary CH2 results in a relationship between the CH + and CH3 abund...
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Interstellar C2 absorption line observations towards the southern OB associations NGC 2439, Vela OB1, and Cen OB1 are used to infer gaskinetic temperatures Tkin and densities nc towards lines of sight with previously determined large CH and CH+ column densities. Towards NGC 2439, the material is characterised by temperatures of Tkin = 75–85 K and densities exceeding nc > 1000 cm−3, and a fracti...
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متن کاملInterstellar CH+ in southern OB associations
Optical absorption line observations of interstellar CH+ andCHare presented towards the southernOBassociations CMa OB1,NGC 2439,Vela OB1,NGC 4755, andCen OB1.A total of 5–11 stars per associationwere observed, with visual extinctions ranging fromAV = 0.5–4.5 mag. The derived CH+ and CH velocities agree within the measurement errors. Towards a particular association, the CH+ column densityN (CH+...
متن کاملHigh-spatial Resolution Observations of Nh 3 and Ch 3 Oh towards the Massive Twin Cores Ngc6334 I & I(n)
Molecular line observations of NH 3 (J,K)=(1,1), (2,2) and CH 3 OH at 24.93 GHz taken with the Australian Telescope Compact Array (ATCA) toward the massive twin cores NGC6334 I & I(N) reveal significant variations in the line emission between the two massive cores. The UCHii region/hot core NGC6334 I exhibits strong thermal NH 3 and CH 3 OH emission adjacent to the UCHii region and coin-cident ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1989
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/241.3.575