This article is cited in 9 papers

GRAVITY, ASTROPHYSICS

Laser action in a gas condensation in the vicinity of a hot star

S. Johansson^a, V. S. Letokhov<sup>b

a</sup> Lund Observatory, Lund University
^b Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow

Abstract: In the region around 1 $\mu $m we have found laser action in a quantum transition between highly excited states in Fe II, with its higher levels being optically pumped by the intense H Ly$\alpha $ radiation (1215 Å) formed in the ionized HII region of a gas condensation (blob B) in the close vicinity of the central star in $\eta $ Carinae.

PACS: 95.75.Fg, 95.85.Jq, 98.38.Gt, 98.58.Bz

Received: 16.04.2002

Language: English

 English version: Journal of Experimental and Theoretical Physics Letters, 2002, 75:10, 495–498

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