Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...325..551f&link_type=abstract
Astronomy and Astrophysics, v.325, p.551-558
Astronomy and Astrophysics
Astrophysics
2
Radiative Transfer, Methods: Statistical, Interplanetary Medium, Planets And Satellites: General, Stars: Circumstellar Matter, Stars: Planetary Systems, Infrared: Solar System
Scientific paper
One of the methods envisaged to detect planets outside of our solar system assumes that certain spectral features at 10 and below 20μm wavelength are typical of planetary atmospheres. Their detection would then be an unambiguous sign of the presence of extrasolar planets. In these spectral regions, there might be interference with the silicate and ice features of circumstellar material still associated with the system. In order to get an estimate of this effect, we used our 3D Monte Carlo radiation transport code to model the spectrum of a Keplerian disk with embedded artificial planets encircling a central star of solar luminosity and temperature. The disk structure and the grain model resemble real properties in protoplanetary disks, the temperature distribution was calculated independently. Three models with different circumstellar dust populations and disk structure were calculated, each of them for two debris disk masses. From the observational point of view, various beam sizes and positions of the observer in respect to the configuration were taken into account. The detectability of the embedded planetary sources is discussed. The results show strong constraints on the detection of planetary atmospheric features through circumstellar dust.
Fischer Oystein
Pfau Werner
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