Heated dust around the LMC Wolf-Rayet system HD 36402 (BAT99-38)
P. M. Williams (Institute for Astronomy, Royal Observatory Edinburgh)
TL;DR
This study detects heated dust around the Wolf-Rayet system HD 36402 in the LMC, indicating dust formation occurs even in metal-poor environments, with variable infrared emission suggesting dynamic dust processes.
Contribution
First infrared detection of heated dust around a Wolf-Rayet system in the LMC, demonstrating dust formation in a metal-poor environment.
Findings
Dust temperature near 800 K
Dust mass approximately 1.5e-7 solar masses
Variable dust emission observed
Abstract
Infrared photometry of the probable triple WC4 (+O?) +O8I: system HD 36402 (BAT99-38) in the LMC shows emission characteristic of heated dust. Although HD 36402 is close to two luminous YSOs, it is possible to distinguish its emission at wavelengths less than 10 microns. Simple modelling indicates a dust temperature near 800 K and mass of about 1.5e-7 Msol amorphous carbon grains. The dust emission appears to be variable. It is apparent that Wolf Rayet dust formation occurs also in metal-poor environments.
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Stellar, planetary, and galactic studies · Astro and Planetary Science