Simulation of polarization maps. II. The circumstellar environment of pre-main sequence objects.

Details Simulation of polarization maps. II. The circumstellar environment of pre-main sequence objects. Simulation of polarization maps. II. The circumstellar environment of pre-main sequence objects.

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...308..863f&link_type=abstract

Astronomy and Astrophysics, v.308, p.863-885

Astronomy and Astrophysics

Astrophysics

59

Polarization, Radiative Transfer, Circumstellar Matter, Infrared: Stars, Stars: Pre-Main Sequence

Scientific paper

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 0.25μm) or a population with only larger grains (radii between 0.1 and 1μm). 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.

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