AAS 207th Meeting, 8-12 January 2006
Session 81 ISM: From Dark to Blinded
Poster, Tuesday, 9:20am-6:30pm, January 10, 2006, Exhibit Hall

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[81.07] Emission from ELDWIM traces the Local Arm

P. Baez, J.C. Cersosimo, R.J. Muller, N. Santiago Figueroa, S. Figueroa Velez (UPR at Humacao), J.C. Testori (Instituto Argentino de Radioastronomia, CONICET. Argentina)

The continuum emission of the galactic region located at G85-0.5 is well defined by the weak 11 cm emission. Extended 3o in diameter, the region is catalogued as W80 and the optical image associated is composed of the North America and the Pelican Nebulae (NPN). In this work we show the results obtained from the observations of the radio recombination line observations made with single dish at the frequency near of 1.4 GHz. These observations are sensitive to extended low density warm ionized medium (ELDWIM) and we investigate its distribution and the physical parameters of the component in the direction of W80. The distribution of the gas in the (X,Y) plot shows that the ionized hydrogen is located in a spiral pattern, defining the local spiral arm between 0.5 to 3.5 kpc from the Sun. It is shown that W80 is a complex of ionized gas distributed along the local spiral arm instead of being clumped at one distance, and the complex is the near structure of the local arm. Simple models suggest average electron densities between 3 and 4 cm-3.

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