Physical parameters of reflection nebulae in the galaxy

Bibcode
1989Ap&SS.156...51C
DOI
10.1007/BF00646344
Centurion, M.; Vladilo, G.
Bibliographical reference

(Instituto de Astrofisica de Canarias and Comision Interministerial de Ciencia y Tecnologia, Summer School on Evolutionary Phenomena in Galaxies, Puerto de la Cruz, Spain, July 4-15, 1988) Astrophysics and Space Science (ISSN 0004-640X), vol. 156, no. 1-2, June 1989, p. 51-56.

Advertised on:
6
1989
Number of authors
2
IAC number of authors
0
Citations
0
Refereed citations
0
Description
Given observed equivalent widths of Mg II and Mg I absorptions due to an interstellar cloud in which a late-B star is embedded, it is shown that the basic physical parameters (kinetic temperature, mean density, electron density, and radius) can be constrained. Hydrogen ionization by means of cosmic rays and the effect of the stellar radiation field on the magnesium ionization equilibrium are taken into account. The method is applied to the reflection nebula surrounding the star HD 26676. The resulting solutions for the radius and temperature of the nebulosity are comparable to the typical values derived for diffuse interstellar clouds from optical and 21-cm measurements.
Type
Non-refereed
Milky Way Galaxy
Reflection nebulae
B stars

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