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

Author:

Liimets Tiina1ORCID,Kraus Michaela1ORCID,Cidale Lydia23ORCID,Karpov Sergey4ORCID,Marston Anthony5ORCID

Affiliation:

1. Astronomical Institute, Czech Academy of Sciences, Fričova 298, 25165 Ondřejov, Czech Republic

2. Instituto de Astrofísica de La Plata (CCT La Plata-CONICET, UNLP), Paseo del Bosque S/N, La Plata B1900FWA, Buenos Aires, Argentina

3. Departamento de Espectroscopía, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, La Plata B1900FWA, Buenos Aires, Argentina

4. Institute of Physics of the Czech Academy of Sciences (FZU AV ČR), Na Slovance 2, Praha 8, 18200 Prague, Czech Republic

5. European Space Agency, European Space Astronomy Centre, Camino Bajo del Castillo, s/n Urbanización Villafranca del Castillo Villañueva de la Cañada, E-28692 Madrid, Spain

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.

Publisher

MDPI AG

Subject

Astronomy and Astrophysics

Reference30 articles.

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