TY - JOUR
T1 - The inner environment of Z Canis Majoris
T2 - High-contrast imaging polarimetry with NaCo
AU - Canovas, H.
AU - Perez, S.
AU - Dougados, C.
AU - De Boer, J.
AU - Ménard, F.
AU - Casassus, S.
AU - Schreiber, M. R.
AU - Cieza, L. A.
AU - Caceres, C.
AU - Girard, J. H.
N1 - Funding Information:
We are grateful to George Hau and to the ESO staff for their help during the observations, and to J. Monnier for sharing the Keck -band images. This research was funded by the Millennium Science Initiative, Chilean Ministry of Economy, Nucleus RC130007. H.C. and C.C. acknowledge support from ALMA/CONICYT (grants 31100025 and 31130027). S.P. and S.C. acknowledge financial support provided by FONDECYT grants 3140601 and 1130949. C.C. and M.R.S. acknowledge support from CONICYT-FONDECYT grant 3140592 and FONDECYT grant 1141269, respectively. L.C. was supported by ALMA-CONICYT and CONICYT-FONDECYT 31120009 and 1140109.
Publisher Copyright:
© 2015 ESO.
PY - 2015/6/1
Y1 - 2015/6/1
N2 - Context. Z CMa is a binary composed of an embedded Herbig Be and an FU Ori class star separated by ~100 au. Observational evidence indicates a complex environment in which each star has a circumstellar disk and drives a jet, and the whole system is embedded in a large dusty envelope. Aims. We aim to probe the circumbinary environment of Z CMa in the inner 400 au in scattered light. Methods. We use high-contrast imaging polarimetry with VLT/NaCo at the H and Ks bands. Results. The central binary is resolved in both bands. The polarized images show three bright and complex structures: a common dust envelope, a sharp extended feature previously reported in direct light, and an intriguing bright clump located $03$ south of the binary, which appears spatially connected to the sharp extended feature. Conclusions. We detect orbital motion when compared to previous observations, and report a new outburst driven by the Herbig star. Our observations reveal the complex inner environment of Z CMa in unprecedented detail and contrast.
AB - Context. Z CMa is a binary composed of an embedded Herbig Be and an FU Ori class star separated by ~100 au. Observational evidence indicates a complex environment in which each star has a circumstellar disk and drives a jet, and the whole system is embedded in a large dusty envelope. Aims. We aim to probe the circumbinary environment of Z CMa in the inner 400 au in scattered light. Methods. We use high-contrast imaging polarimetry with VLT/NaCo at the H and Ks bands. Results. The central binary is resolved in both bands. The polarized images show three bright and complex structures: a common dust envelope, a sharp extended feature previously reported in direct light, and an intriguing bright clump located $03$ south of the binary, which appears spatially connected to the sharp extended feature. Conclusions. We detect orbital motion when compared to previous observations, and report a new outburst driven by the Herbig star. Our observations reveal the complex inner environment of Z CMa in unprecedented detail and contrast.
KW - Accretion, accretion disks
KW - Binaries: general
KW - Instrumentation: high angular resolution
KW - Stars: pre-main sequence
KW - Stars: variables: T Tauri, Herbig Ae/Be
KW - Techniques: polarimetric
UR - http://www.scopus.com/inward/record.url?scp=84930663545&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/201526134
DO - 10.1051/0004-6361/201526134
M3 - Article
AN - SCOPUS:84930663545
SN - 0004-6361
VL - 578
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - L1
ER -