The SARG very high resolution spectrum of P Cygni

Details The SARG very high resolution spectrum of P Cygni The SARG very high resolution spectrum of P Cygni

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aspc..233..109r&link_type=abstract

P Cygni 2000: 400 Years of Progress, ASP Conference Proceeding Vol. 233, Edited by M. de Groot and C. Sterken, San Francisco: As

Astronomy and Astrophysics

Astronomy

Scientific paper

We present here the results of a preliminary analysis of the very-high-resolution spectrograms (R=86,000) of P Cyg obtained with the new SARG spectrograph attached to the Italian National Telescope (TNG). A marked change in the Hα profile is noticed with respect to the May 1996 observations of Gäng (2000). We also analyse the effect of the telluric lines on the spectral appearence by comparison with lower-resolution observations, and find that it can simulate weak-line variability.

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