2002ApJ...580L.167M


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET19:43:47

2002ApJ...580L.167M - Astrophys. J., 580, L167-L170 (2002/December-1)

Discovery of a near-infrared jetlike feature in the Z Canis Majoris system.

MILLAN-GABET R. and MONNIER J.D.

Abstract (from CDS):

We present near-infrared high-resolution observations of the young binary system Z Canis Majoris using the adaptive optics system at the Keck II telescope. Both components are unresolved at 1.25 and 1.65 µm, although high dynamic range images reveal a previously unknown jetlike feature in the circumstellar environment. We argue that this feature probably arises from light scattered off the walls of a jet-blown cavity, and proper-motion studies of this feature can probe the dynamics of the bipolar outflow. Potentially, the morphology of the dust-laden cavity walls offers a new probe of the momentum profile and collimation of bipolar winds from young stellar objects. We also derive high-precision binary parameters, which when combined with historical data have allowed the first detection of orbital motion. Finally, our observations confirm the high degree of flux variability in the system; the northwest binary component is dominant at the H band, in contrast to all previous observations.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Instrumentation: Adaptive Optics - Stars: Planetary Systems: Protoplanetary Disks - Stars: Formation - Techniques: High Anular Resolution

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* Z CMa Ae* 07 03 43.1588002461 -11 33 06.230351311 10.51 9.99 8.80     B5/8eq+F5/7 526 3
2 HD 54335 V* 07 07 59.3656341338 -11 35 47.295061691   8.93 7.38     K4III 4 0
3 * ksi UMa B SB* 11 18 10.8360115405 +31 31 44.821690914   5.38 4.729 4.4   G2V 327 2
4 * ksi UMa Bb BD? 11 18 10.92 +31 31 45.1           ~ 14 1
5 * ksi UMa RS* 11 18 10.932 +31 31 45.44 4.42 4.38 3.79     F8.5:V+G2V 255 0

    Equat.    Gal    SGal    Ecl

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2020.02.17-19:43:47

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