Episodic formation of cometary material in the outburst of a solar-like young star - Astrophysics > Solar and Stellar AstrophysicsReportar como inadecuado




Episodic formation of cometary material in the outburst of a solar-like young star - Astrophysics > Solar and Stellar Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: Our Solar System originated in interstellar gas and dust; the latter is inthe form of amorphous silicate particles and carbonaceous dust. The compositionof cometary material shows that a significant fraction of the amorphoussilicates was transformed into crystalline form during the early evolution ofthe protosolar nebula. How and when this transformation happened has beencontroversial, with the main options being heating by the young Sun or shockheating. Here we report mid-infrared features in the outburst spectrum of theyoung solar-like star EX Lupi that were not present in quiescence. We attributethem to crystalline forsterite; the crystals were produced via thermalannealing in the surface layer of the inner disk by heat from the outburst, aprocess that has hitherto not been considered. The observed lack of coldcrystals excludes shock heating at larger radii.



Autor: P. Ábrahám 1, A. Juhász 2, C.P. Dullemond 2, Á. Kóspál 3, R. van Boekel 2, J. Bouwman 2, Th. Henning 2, A. Moór 1, L. Moso

Fuente: https://arxiv.org/



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