A Galactic Plane Survey in the CO (2-1) Line with the 60 cm Telescopes to Address Physical Condition of the Interstellar Matter

To address its temperature and density we made observations of the galactic plane in CO (2-1) line with VST1 and VST2. Using a kinetic model we estimate the volume emissivities and the line intensity ratio as a function of galactocentric radius. Using data in the first and 4th quadrants separately w...

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Veröffentlicht in:Symposium - International Astronomical Union 2002, Vol.199, p.339-340
Hauptverfasser: Handa, T., Hasegawa, T., Morino, J.I., Sawada, T., Sakamoto, S., Usuda, K.S., Luna, A., Bronfman, L., Hayashi, M.
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container_title Symposium - International Astronomical Union
container_volume 199
creator Handa, T.
Hasegawa, T.
Morino, J.I.
Sawada, T.
Sakamoto, S.
Usuda, K.S.
Luna, A.
Bronfman, L.
Hayashi, M.
description To address its temperature and density we made observations of the galactic plane in CO (2-1) line with VST1 and VST2. Using a kinetic model we estimate the volume emissivities and the line intensity ratio as a function of galactocentric radius. Using data in the first and 4th quadrants separately we got shallow gradient in the both quadrants; at the smaller radius is the higher in ratio. The gradient is contributed by less bright pixels in the l-v diagram, suggesting molecular gas in interarm is different along the galactocentric radius but in arm is not.
doi_str_mv 10.1017/S0074180900169256
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title A Galactic Plane Survey in the CO (2-1) Line with the 60 cm Telescopes to Address Physical Condition of the Interstellar Matter
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