Study of the filamentary infrared dark cloud G192.76+00.10 in the S254-S258 OB complex
| Autor: | Manash R. Samal, P. M. Zemlyanukha, Igor Zinchenko, Andrej M. Sobolev, Dmitry A. Ladeyschikov, Christian Henkel, Devendra K. Ojha, O. L. Ryabukhina |
|---|---|
| Předmět: |
INDIVIDUAL OBJECTS (G192.76+00.10) [ISM]
010504 meteorology & atmospheric sciences Hydrogen FOS: Physical sciences chemistry.chemical_element Astrophysics 01 natural sciences Protein filament chemistry.chemical_compound FORMATION [STARS] 0103 physical sciences Carbon monosulfide Isotopologue Infrared dark cloud 010303 astronomy & astrophysics 0105 earth and related environmental sciences Physics Carbon-13 Order (ring theory) Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies CLOUDS [ISM] chemistry Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) MOLECULES [ISM] Atomic physics Carbon monoxide |
| Zdroj: | NASA Astrophysics Data System Res. Astron. Astrophys. Research in Astronomy and Astrophysics |
| Popis: | We present results of a high resolution study of the filamentary infrared dark cloud G192.76+00.10 in the S254-S258 OB complex in several molecular species tracing different physical conditions. These include three isotopologues of carbon monoxide (CO), ammonia (NH$_3$), carbon monosulfide (CS). The aim of this work is to study the general structure and kinematics of the filamentary cloud, its fragmentation and physical parameters. The gas temperature is derived from the NH$_3 $ $(J,K) = (1,1), (2,2)$ and $^{12}$CO(2--1) lines and the $^{13}$CO(1--0), $^{13}$CO(2--1) emission is used to investigate the overall gas distribution and kinematics. Several dense clumps are identified from the CS(2--1) data. Values of the gas temperature lie in the ranges $10-35$ K, column density $N(\mathrm{H}_2)$ reaches the value 5.1 10$^{22}$ cm$^{-2}$. The width of the filament is of order 1 pc. The masses of the dense clumps range from $ \sim 30 $ M$_\odot$ to $ \sim 160 $ M$_\odot$. They appear to be gravitationally unstable. The molecular emission shows a gas dynamical coherence along the filament. The velocity pattern may indicate longitudinal collapse. Comment: 10 pages, 9 figures, accepted for publication in Research in Astronomy and Astrophysics |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|