X-ray and UV Photoionization and Photoexcitation of Pre-Main-Sequence Star Transitional Disks

Details X-ray and UV Photoionization and Photoexcitation of Pre-Main-Sequence Star Transitional Disks X-ray and UV Photoionization and Photoexcitation of Pre-Main-Sequence Star Transitional Disks

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2349b&link_type=abstract

Chandra Proposal ID #09200763

Physics

Chandra Proposal Id #09200763

Scientific paper

Transitional disks are one of the most crucial and important stages of the evolution of pre-main-sequence stars and protoplanetary systems. These disks have transformed most of the dust and gas in their inner regions into planetesimals and show clear inner ``holes'' that almost certainly harbor infant planetary systems. We propose to observe 3 young stars with transitional disks (T Cha, GM Aur, LkHa 330) using ACIS-S to measure their X-ray radiation field and coronal emission properties and HST ACS-SBC to image the fluorescently excited molecular hydrogen in these systems to determine if the gas distribution follows the behavior seen in the dust distribution. Our broader goal is to model the X-ray/UV photoionization and photoexcitation of the disks and study their photochemistry.

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