High-Temperature Optical Constants of Dust Analogues for the Solar Nebula

TL;DR

This study measures the optical constants of dust analogues at high temperatures up to 700°C to better interpret infrared spectra of protoplanetary disks and related stellar objects.

Contribution

It provides laboratory-derived optical constants for hot dust analogues, enabling improved comparison between observed and simulated infrared spectra in astrophysics.

Findings

Optical constants calculated for dust analogues up to 700°C.

Simulated emission spectra compared with astronomical observations.

Enhanced understanding of dust properties in protoplanetary environments.

Abstract

The dust in protoplanetary disks is influenced by a lot of different processes. Besides others, heating processes are the most important ones: they change not only the physical and chemical properties of dust particles, but also their emission spectra. In order to compare observed infrared spectra of young stellar systems with laboratory data of hot (up to 700{\deg}C) circumstellar dust analogues, we investigate materials, which are important constituents of dust in protoplanetary disks. We calculated the optical constants by means of a simple Lorentzian oscillator fit and apply them to simulations of small-particle emission spectra in order to compare our results with real astronomical spectra of AGB-stars and protoplanetary disks.