Large-Scale Ejecta of Z CMa -- Proper Motion Study and New Features Discovered

Abstract

Z Canis Majoris is a fascinating early-type binary with a Herbig Be primary and a FU Orionis-type secondary. Both of the stars exhibit sub-arcsecond jet-like ejecta. In addition, the primary is associated with the extended jet as well as with the large-scale outflow. In this study, we investigate further the nature of the large-scale outflow, which has not been studied since its discovery almost three and a half decades ago. We present proper motion measurements of individual features of the large-scale outflow and determine their kinematical ages. Furthermore, with our newly acquired deep images, we have discovered additional faint arc-shaped features that can be associated with the central binary.

15 pages, 4 figures, published in Galaxies

References in corpus (8)

• Molecular emission from GG Car's circumbinary disk
• A likely flyby of binary protostar Z CMa caught in action
• The inner environment of Z~CMa: High-Contrast Imaging Polarimetry with NaCo
• Sub-0.1" optical imaging of the Z CMa jets with SPHERE/ZIMPOL
• The 2008 outburst in the Young Stellar System Z CMa. III - Multi-epoch high-angular resolution images and spectra of the components in near-infrared
• Follow-Up of Extended Shells around B[e] Stars
• A deep mosaic of [O III] 5007 A CCD images of the environment of the LBV star P Cygni
• Nebulosities and jets from outbursting evolved stars