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Relative intensities of Hydrogen lines as a tool to astrophysical plasmaстатья
- Авторы: Katysheva N.A., Grinin V.P.
- Сборник: Proceedings of the meeting Radiation mechanisms of astrophysical objects: classics today
- Серия: Proceedings of the conference in honor of the 100th birthday of Academician V.V. Sobolev held at St. Petersburg on September 21{25, 2015
- Год издания: 2017
- Место издания: Edit Print Erevan
- Первая страница: 198
- Последняя страница: 202
- Аннотация: The hydrogen lines play an important role in diagnostics of astrophysical plasma. In recent years, the lines of higher hydrogen series became the objects of the research, thanks to the rapid development of the infrared spectroscopy. In this paper, we investigate the relative intensities of the Paschen and Brackett lines as well as the ratio of Ly alfa/H alfa over a large range of the optical depth of gas. The calculations are ful lled on the basis of the Sobolev approximation for collisional excitations and ionizations of atoms for the electron temperature Te<10000 K. The behavior of the electron density Ne at the gas thermalization is investigated. It is shown that a very sharp jump in the degree of ionization is observed near the LTE conditions. The results obtained can be used both for the diagnostics of emitting regions and for determining the extinction for the objects with strong absorption.
- Добавил в систему: Катышева Наталья Андреевна