Spectroscopic observations of parsamian 21

Details Spectroscopic observations of parsamian 21 Spectroscopic observations of parsamian 21

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ap.....39..121p&link_type=abstract

Astrophysics, Volume 39, Issue 2, pp.121-125

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

This work presents spectroscopic observations of Parsamian 21, which has been shown recently by Staude and Neckel to be a fuor-type star. A list of identified absorption lines is given. The results are compared with previous spectroscopic observations over the period 1966 1990. It is shown that the Hσ line profile changed during this period; according to the observations of 1986, the center of the Hσ absorption line was shifted by -140 km/sec from λ0 and reached -600 km/sec at the line edge. It follows from the presented lightcurve that the star has undergone brightness variations of nearly three magnitudes and most likely became a fuor before 1902.

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