Rapid strengthening of iron forbidden lines in the spectrum of V838 Mon

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Optical, Binaries, Novae, Variables, Stars

Scientific paper

V838 Mon is a peculiar nova which showed a red K-M type spectrum in its outburst in 2002. Along with two similar objects, V4332 Sgr and M31 V1006/7, it forms a new class of eruptive variable stars. We report spectral observations obtained with the Russian 6-m BTA telescope (Special Astrophysical Observatory). In our spectrum taken on 2005 December 11 (3960-5741A, resolution 4.6A) two known companions of this binary system are seen, B3V star and cool oxygen-rich L type supergiant, the remnant of the outburst.

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