Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 1K038

TWO EPOCH FABRY-PEROT OBSERVATIONS OF FS TAU B

Movsessian, Tigran (Byurakan Observatory)
Magakian, Tigran (Byurakan Observatory)
Moiseev, Alexei (Special Astrophysical Observatory)

Abstract:
We present observations obtained with a 6 m telescope (Russia) using the SCORPIO camera with scanning Fabry-Perot interferometer. Two epochs of the observations of the FS T au B region in Hα emission (2001 and 2012) allowed us to measure the proper motions for the spectrally separated inner structures of the jet. Unlike of other knots, the bar-shaped structure NE from the source does not have any perceptible proper motion and represents stationary deflecting shock region. In the jet working surface two different radial velocity structures were found. Proper motion of these structures indicates the presence of two separate knots with different velocities in this region. Investigation of Hα profiles toward the source and the bright reflection nebula R1 shows impressive differences. In fact, we observe the single peak profile in the direction of the source and the double peak profile in the direction of reflection nebula. The reflection nebula works as a mirror located just on the axis of the flow and we observe the same source as edge-on system (source) and pole-on system (R1 nebula) simultaneously. We propose the scenario of formation of absorption component, which splits the emission profile, in a wide angle cool wind from the source.

Click here to view poster PDF