Development of discrete velocity components in the optical spectrum of T Pyx
Scritto
il 07 Giu 2011 alle 01:35
in Pubblicazioni
We have continued out high resolution optical spectroscopy of the latest
outburst of T Pyx with the FIES fiber-fed echelle (R ~ 67000) as first
reported in ATel 3306. Here we describe the changes in the optical
resonance and Fe II lines. The first observation, obtained on 2011 Apr.
15.92 UT, shows a pre-maximum spectrum (e.g. McLaughlin, D. B. 1964,
Ann.Ap., 27, 450, now identified as the so-called fireball stage)
showing only Balmer series and He I/II with P Cyg components extending
to -3000 km/s, and a complex blend at C III/ N II 4640 A.