Abrupt change of the H-alpha emission-line profile of PU Vulpeculae in 1989

Details Abrupt change of the H-alpha emission-line profile of PU Vulpeculae in 1989 Abrupt change of the H-alpha emission-line profile of PU Vulpeculae in 1989

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44..543t&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 5, p. 543-551.

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7

H Alpha Line, Line Shape, Novae, Radial Velocity, Symbiotic Stars, Emission Spectra, Stellar Winds

Scientific paper

We report on dramatic changes over a short period of time in 1989 of the emission-line profiles of the hydrogen Balmer lines, particularly H-alpha, from a suspected symbiotic nova, PU Vul. The characteristic behavior of these changes in the self-absorption feature of H-alpha and other higher members differs from that based upon the oscillator strengths. Another characteristic of these changes is a broadening of the H-alpha line, and a much less apparent broadening of the H-beta or H-gamma lines. We noticed an abrupt variation in the radial velocities measured from the Balmer lines, while those of Fe II and N II forbidden lines seemed to be constant. We also report on a subsequent return to normal of the H-alpha profile in 1990.

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