A Short Guide to Debris Disk Spectroscopy - Astrophysics > Earth and Planetary AstrophysicsReportar como inadecuado




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Abstract: Multi-wavelength spectroscopy can be used to constrain the dust and gasproperties in debris disks. Circumstellar dust absorbs and scatters incidentstellar light. The scattered light is sometimes resolved spatially at visualand near-infrared wavelengths using high contrast imaging techniques thatsuppress light from the central star. The thermal emission is inferred frominfrared through submillimeter excess emission that may be 1-2 orders ofmagnitude brighter than the stellar photosphere alone. If the disk is notspatially resolved, then the radial distribution of the dust can be inferredfrom Spectral Energy Distribution SED modeling. If the grains aresufficiently small and warm, then their composition can be determined frommid-infrared spectroscopy. Otherwise, their composition may be determined fromreflectance and-or far-infrared spectroscopy. Atomic and molecular gas absorband resonantly scatter stellar light. Since the gas is believed to besecondary, detailed analysis analysis of the gas distribution, kinematics, andcomposition may also shed light on the dust composition and processing history.



Autor: Christine H. Chen

Fuente: https://arxiv.org/



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