On the spectrum of a gaseous nebula of pure hydrogen - III: The Balmer decrement

The Balmer decrement was calculated for a homogeneous, spherical, pure hydrogen nebula, ionised and excited both by radiative and collisional processes. Reabsorption in the Balmer series from sublevels 2 s and 2 p was taken into account. Calculations were carried out for electron temperatures of 104...

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Autor principal: Gerola, H.
Otros Autores: Salem, M., Panagia, N.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Kluwer Academic Publishers 1971
Acceso en línea:Registro en Scopus
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100 1 |a Gerola, H. 
245 1 3 |a On the spectrum of a gaseous nebula of pure hydrogen - III: The Balmer decrement 
260 |b Kluwer Academic Publishers  |c 1971 
270 1 0 |m Gerola, H.; Departmento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina 
506 |2 openaire  |e Política editorial 
504 |a Auer, L.H., Transfer of Lyman Alpha in Diffuse Nebulae (1968) The Astrophysical Journal, 153, p. 783 
504 |a Avery, L.W., House, L.L., An Investigation of Resonance-Line Scattering by the Monte Carlo Technique (1968) The Astrophysical Journal, 152, p. 493 
504 |a Burgess, A., (1965) Mem. Roy. Astron. Soc., 69, p. 1 
504 |a Capriotti, E., The Hydrogen Radiation Spectrum in Gaseous Nebulae. (1964) The Astrophysical Journal, 139, p. 225 
504 |a Caputo, F., Gerola, H., Panagia, N., (1970) Astrophys. Letters, 5, p. 275 
504 |a Cox, D.P., Matthews, W.G., Effects of Self-Absorption and Internal Dust on Hydrogen-Line Intensities in Gaseous Nebulae (1969) The Astrophysical Journal, 155, p. 859 
504 |a Flower, D.R., The Ionization Structure of Planetary Nebulae--VIII: Models of the Nebulae NGC 7662 and IC 418 (1969) Monthly Notices of the Royal Astronomical Society, 146, p. 243 
504 |a Gerola, H., Panagia, N., (1968) Astrophys. Space Sci., 2, p. 285 
504 |a Gerola, H., Panagia, N., (1970) Astrophys. Space Sci., 8, p. 120 
504 |a Karzas, W.I., Latter, R., (1961) Astrophys. J., p. 167 
504 |a Kuhi, L.Y., (1968) Interstellar Ionized Hydrogen, , Y., Terzian, W. A. Benjamin, New York 
504 |a Mihalas, D., Statistical-Equilibrium Model Atmospheres for Early-Type Stars. I. Hydrogen Continua (1967) The Astrophysical Journal, 149, p. 169 
504 |a O'Dell, C.R., Photoelectric Spectrophotometry of Planetary Nebulae. (1963) The Astrophysical Journal, 138, p. 1018 
504 |a O'Dell, C.R., A New Peculiar Emission-Line Object (1966) The Astrophysical Journal, 145, p. 487 
504 |a O'Dell, C.R., Photoelectric Spectrophotometry of MHα 328-116 (1967) The Astrophysical Journal, 149, p. 373 
504 |a Osterbrock, D.E., The Escape of Resonance-Line Radiation from an Optically Thick Nebula. (1962) The Astrophysical Journal, 135, p. 195 
504 |a Parker, R.A.R., The Spectrum of a Nebula Under Conditions of Collisional Excitation and Ionization (1964) The Astrophysical Journal, 139, p. 208 
504 |a Seaton, M. J.: 1960, in Reports on Progress in Physics, 23, 317; Wampler, E.J., Line Intensities in Quasi-Stellar Objects. I. PHL 938, 3c 249.1, and PKS 2251+11 (1968) The Astrophysical Journal, 153, p. 19 
520 3 |a The Balmer decrement was calculated for a homogeneous, spherical, pure hydrogen nebula, ionised and excited both by radiative and collisional processes. Reabsorption in the Balmer series from sublevels 2 s and 2 p was taken into account. Calculations were carried out for electron temperatures of 104 K and 2×104 K, electron densities from 103 to 106 cm-3, and radii from 1015 to 1017 cm. The results define allowed and forbidden regions in the log(Hβ/Hγ) vs log(Hα/Hβ) diagram different from those of previous results obtained assuming purely radiative or purely collisional ionisation and excitation. A brief comparison with observations is presented and discussed. © 1971 D. Reidel Publishing Company.  |l eng 
593 |a Departmento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina 
593 |a Laboratorio di Astrofisica, Frascati, Italy 
700 1 |a Salem, M. 
700 1 |a Panagia, N. 
773 0 |d Kluwer Academic Publishers, 1971  |g v. 10  |h pp. 383-392  |k n. 3  |p Astrophys Space Sci  |x 0004640X  |w (AR-BaUEN)CENRE-3855  |t Astrophysics and Space Science 
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