ForumSpringerAstron. Astrophys.
ForumWhats NewSearchOrders

Astron. Astrophys. 326, 870-872 (1997)

Next Section Table of Contents

Research Note

N III and N IV line emission following K-shell photoionization

D. Petriniand F.X. de Araújo 1, 2

1 Observatoire de la Côte d'Azur, Department G. D. Cassini, BP 4229, F-06304 Nice Cedex 4, France (e-mail: petrini@obs-nice.fr)
2 CNPq-Observatório Nacional, DAGE, 77 Rua José Cristino, Rio de Janeiro, CEP 20921-400, Brazil (e-mail: araujo@dage1.on.br)

Received 21 March 1997 / Accepted 12 May 1997


Soft X-ray irradiation of low density cold matter K-ionizes neutral nitrogen. The full ionization process followed by Auger decay populates the excited states of N III and N IV ions. N III and N IV uv lines are therefore produced directly with comparable intensities. Some observable intensity ratios are evaluated.

Key words: atomic processesatomic dataUV: generalX-rays: general

Send offprint requests to: D. Petrini


Next Section Table of Contents

© European Southern Observatory (ESO) 1997

Online publication: October 15, 1997