@Web page created by G. Gómez & R. López
Last update 08/10/07
PMAS
OBSERVATIONS OF TURBULENT STELLAR JETS
HH 110 (in L 1267, d=460 pc) and HH 262 (in
L 1551,
d=140 pc) are two Herbig-Haro objects which share a peculiar, rather
chaotic
morphology. No source to power these jets has been detected at optical
or
radio wavelengths. Both, previous observations and models suggest that
the
emission of these objects reveals an early stage of the interaction
between the supersonic jet outflow and the dense jet environment. These
objects are thus suitable to search
for observational signatures of jet/cloud interaction. With this aims,
we mapped these HHs with PMAS (under the
PPAK configuration) to get new data on their kinematics and their
spatial excitation and density structures.
Using several pointings ( 4 for HH 110 and 8 for HH 262) our data
spatially cover all the main line-emission regions previously
detected through CCD narrow-band filters imaging, within a spectral
range suitable to get the
2D emission structure of characteristic red HH lines (Hα and the [NII]
and [SII] doublets), with a spectral resolution <
15 km s-1.
Here we show some of the maps we have built from the obtained PMAS data
of the
observed objects:
OBSERVATIONS
(ojo! verificar detalles con Sebastian)
Observations of the two Herbig-Haro objects HH 110 and
HH 262, and the HH-like object HHL 73 were made on 22
November 2004 under ? wheather conditions (typical seeing value
xx?).
Data were adquired in the 3.5m CAHA telescope with the Integral
Field Instrument PMAS using the PPAK configuration (331
fibers of 2.7"/fib, in an hexagon of 72" diameter) and the J1200
grating (spectral resolution, 0.22 Å pix -1, ~ 10 km s-1
for Hα), covering a wavelength range ~ 6500-7000 Å, which
includes the emissions from Hα and the [NII] and [SII] doublets.
Because the spatial extent of these objects, several overlapping
pointings were needed to map the whole emissions. Individual pointings
were centered according to the knot positions given in Table 1