Simulation of polarization maps. II. The circumstellar environment of pre-main sequence objects.
O. Fischer, T. Henning, H. W. Yorke;
AaA, 1996, 308, 863
ABSTRACT:We simulate near-infrared (J, H, K) polarization observations of young stellar objects (YSOs) in the pre-main sequence phase of their
evolution with a Monte-Carlo radiative transfer code.
The circumstellar
environment of the PMS objects is assumed to be a combination of a disk, a bipolar
outflow and the cloud core.
The density and temperature distributions are
based on different analytical models which result from theoretical work as
well as the fitting of observational data.
Calculations with two
different grain models were performed - either with a diffuse ISM-population
(radii between 0.005 and 0.25{mu}m) or a population with only larger grains
(radii between 0.1 and 1{mu}m).
The results are presented as a grid of
polarization maps, iso-intensity maps and maps of colour differences.
In
addition, we discuss spatially unresolved polarization data.
The results
should be very useful for the interpretation of infrared observations of
YSOs.
KEYWORDS: polarization, radiative transfer, circumstellar matter, infrared: stars, stars: pre-main sequence
PERSOKEY:polarisation, nir, simulation, ,
CODE: fischer96