J/A+A/627/A94 FS Tau B two epoch spectro-imagery (Movsessian+, 2019)
Two epoch spectro-imagery of FS Tau B outflow system.
Movsessian T.A., Magakian T.Yu., Burenkov A.N.
<Astron. Astrophys. 627, A94 (2019)>
=2019A&A...627A..94M 2019A&A...627A..94M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, pre-main sequence ; Interstellar medium
Keywords: stars: pre-main sequence - stars: individual: FS Tau B -
ISM: jets and outflows - Herbig-Haro objects
Abstract:
Herbig-Haro (HH) flows exhibit a large variety of morphological and
kinematical structures such as bow shocks, Mach disks, and deflection
shocks. Both proper motion (PM) and radial velocity investigations are
essential to understand the physical nature of such structures.
We investigate the kinematics and PM of spectrally separated
structures in the FS Tau B HH flow. Collating these data makes it
possible to understand the origin of these structures and to explain
the unusual behavior of the jet. On the other hand, the study of
emission profiles in the associated reflection nebulae allows us to
consider the source of the outflow both from edge-on and pole-on
points of view.
We present the observational results obtained with the 6 m telescope
at the Special Astrophysical Observatory of the Russian Academy of
Sciences using the SCORPIO multimode focal reducer with a scanning
Fabry-Perot interferometer. Two epochs of the observations of the FS
Tau B region in Hα emission (2001 and 2012) allowed us to
measure the PM of the spectrally separated inner structures of the
jet.
In addition to already known emission structures in the FS Tau B
system, we discover new features in the extended part of the jet and
in the counter-jet. Moreover, we reveal a new HH knot in the HH 276
independent outflow system and point out its presumable source. In the
terminal working surface of the jet, structures with different radial
velocities have PMs of the same value. This result can be interpreted
as the direct observation of bow-shock and Mach disk regions. A
bar-like structure, located southwest from the source demonstrates
zero PM and can be considered as one more example of deflection shock.
An analysis of Hα profiles in the reflection nebulae R1 and R3
indicates the uniqueness of this object, which can be studied in
pole-on and edge-on directions simultaneously.
Description:
The data consist of two reduced data cubes obtained in 2001 and 2012
with a scanning Fabry-Perot interferometer, centered on the Hα
line. More details can be found in the Sec.2 of the paper.
Common properties of the data cubes stored in the 'fits' subdirectory:
* Data are in fits format
* Cube axes are:
(1) spatial coordinate 1
(2) spatial coordinate 2
(3) wavelength (in Angstroems)
* Due to field rotation of 6-m telescope, spatial coordinates
do not correspond to equatorial coordinate system.
* Heliocentric correction to wavelengths is NOT applied
The sizes and spatial sampling of the cubes are not the same because
the observations were performed with two different interferometers and
light-acquisition systems.
Objects:
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RA (2000) DE Designation(s)
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04 22 00.697 +26 57 32.49 FS Tau B = 2MASS J04220069+2657324
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File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 118 2 List of fits datacubes
fits/* . 2 Individual datacubes
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.5 deg RAdeg Right Ascension of center (J2000)
9- 17 F9.5 deg DEdeg Declination of center (J2000)
19- 21 I3 --- Nx Number of pixels along X-axis
23- 25 I3 --- Ny Number of pixels along Y-axis
27- 28 I2 --- Nz Number of slices
30- 39 A10 "date" Obs.Date Observation date
41- 44 I4 0.1nm blambda Lower value of wavelength interval
46- 52 F7.2 0.1nm Blambda Upper value of wavelength interval
54- 61 F8.6 0.1nm dlambda Wavelegnth resolution
63- 67 I5 Kibyte size Size of FITS file
69- 83 A15 --- FileName Name of FITS file, in subdirectory fits
85-118 A34 --- Title Title of the FITS file
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Acknowledgements:
Tigran Magakian, tigmag(at)sci.am
(End)Tigran Magakian [BAO, Armenia], Patricia Vannier [CDS] 19-Jun-2019