High-Energy Radiation Probes of Protostellar Envelopes

Details High-Energy Radiation Probes of Protostellar Envelopes High-Energy Radiation Probes of Protostellar Envelopes

2003-11-03

arxiv.org/abs/astro-ph/0311022v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures. Proceedings of the 2003 Zermatt Conference

Scientific paper

We present observations of molecular high-energy radiation probes and report the first detections of CO+ toward W3 IRS5, a source containing ultracompact HII regions. UV radiation and X-rays from the central objects may enhance molecules due to photodissociation and ionization processes. To study the effects on the immediate YSO environment, we are developing time- and depth-dependant chemical models containing UV and X-ray chemistry, by extending the models of Doty et al. (2002). Molecules like CO+ or NO may be used as tracers of very early X-ray emission in regions of high extinction, from which no X-ray photons can be detected.

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