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

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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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Autores principales: Gerola, H., Salem, M., Panagia, N.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004640X_v10_n3_p383_Gerola
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_0004640X_v10_n3_p383_Gerola2023-10-03T14:02:46Z On the spectrum of a gaseous nebula of pure hydrogen - III: The Balmer decrement Gerola, H. Salem, M. Panagia, N. 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. Fil:Salem, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0004640X_v10_n3_p383_Gerola
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description 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.
format JOUR
author Gerola, H.
Salem, M.
Panagia, N.
spellingShingle Gerola, H.
Salem, M.
Panagia, N.
On the spectrum of a gaseous nebula of pure hydrogen - III: The Balmer decrement
author_facet Gerola, H.
Salem, M.
Panagia, N.
author_sort Gerola, H.
title On the spectrum of a gaseous nebula of pure hydrogen - III: The Balmer decrement
title_short On the spectrum of a gaseous nebula of pure hydrogen - III: The Balmer decrement
title_full On the spectrum of a gaseous nebula of pure hydrogen - III: The Balmer decrement
title_fullStr On the spectrum of a gaseous nebula of pure hydrogen - III: The Balmer decrement
title_full_unstemmed On the spectrum of a gaseous nebula of pure hydrogen - III: The Balmer decrement
title_sort on the spectrum of a gaseous nebula of pure hydrogen - iii: the balmer decrement
url http://hdl.handle.net/20.500.12110/paper_0004640X_v10_n3_p383_Gerola
work_keys_str_mv AT gerolah onthespectrumofagaseousnebulaofpurehydrogeniiithebalmerdecrement
AT salemm onthespectrumofagaseousnebulaofpurehydrogeniiithebalmerdecrement
AT panagian onthespectrumofagaseousnebulaofpurehydrogeniiithebalmerdecrement
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