Open AccessFast variability of the outflow in the Z CMa system
Author(s) -
D. Chochol,
M. Teodorani,
F. Strafella,
L. Errico,
A. A. Vittone
Publication year - 1998
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1998.01334.x
Subject(s) - physics , outflow , astrophysics , emission spectrum , stellar wind , astronomy , spectral line , meteorology , stars
High‐resolution, time‐resolved spectroscopic observations of Z CMa carried out on 1997 January 14–17 are presented. Large night‐to‐night and hour‐to‐hour variations in Hα, Hβ and Na i D P Cygni absorptions, as well as an Hβ emission peak, were observed. Variations in the red wings of the hydrogen emission lines were also detected. The high‐velocity wide‐emission component on the blue side of Hα appeared on January 17. The observations are discussed in the framework of current wind models.