Temperature and Density Gradients in the Orion Nebula

Details Temperature and Density Gradients in the Orion Nebula Temperature and Density Gradients in the Orion Nebula

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..15..181b&link_type=abstract

Winds, Bubbles, and Explosions: a conference to honor John Dyson, Pátzcuaro, Michoacán, México, September 9-13, 2002 (Eds. S. J.

Astronomy and Astrophysics

Astronomy

1

Hii Regions, Ism: Individual (Orion Nebula), Line: Formation

Scientific paper

To model the ionization structure of the Orion nebula, we adopt a steep density stratification, increasing as a power-law ( n ~ x^-2) function of distance x from the ionization front. The line-ratio gradients observed along the slit are qualitatively reproduced by our density stratified models. Collisional deexcitation appears to be responsible for half of the gradient observed in the [N II] <~mbda 5755} / [N II] <~mbda 6583} temperature sensitive ratio.

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