The X-ray emission of cTTS binary TWA 30

Details The X-ray emission of cTTS binary TWA 30 The X-ray emission of cTTS binary TWA 30

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop..100s&link_type=abstract

XMM-Newton Proposal ID #06725001

Computer Science

Stars, White Dwarfs, Solar System, Twa 30

Scientific paper

The recently discovered binary system TWA 30 consists of two of the nearest known examples of actively accreting, pre-MS star systems. Both components of TWA 30 have masses just above the brown dwarf regime and are orbited by circumstellar disks viewed nearly edge-on. TWA 30A, a known X-ray source, exhibits large, variable optical/IR extinction that is evidently due to variable disk absorption. We propose to use XMM to obtain two 75 ks exposures of TWA 30, separated by at least one month. The resulting, merged gratings spectrum of TWA 30A and the EPIC CCD spectroscopy obtained at the two epochs for both stars will provide new constraints for models of pre-MS X-ray emission, and will supply unique information concerning disk viewing angles, masses, and gas/dust ratios in the TWA 30 system.

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