X-Ray Induced Chemistry in Protostars

Details X-Ray Induced Chemistry in Protostars X-Ray Induced Chemistry in Protostars

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..780m&link_type=abstract

Chandra Proposal ID #03200591

Computer Science

Chandra Proposal Id #03200591

Scientific paper

The envelopes of protostars are the subject of intense research in the mm domain because of their cold temperatures (T ~ 10-30 K). However, for some moderately luminous protostars (Lbol ~ 10 Lsun) there is evidence for enhanced heating and ionization in their interiors (T ~ 300 K), from CO+, SO+ and FIR high-J CO studies. We have developed a model to explain these enhancements in terms of internal irradiation by a central luminous X-ray source (Lx ~ 10^31 erg s-1, Tx ~ 3 keV), quite comparable with existing X-ray detections of protostars. We propose for the first time a "live" study of the chemical interactions between X-rays and circumstellar envelopes, by searching for X-ray emission from three "chemically active" young protostars.

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