Is NeII a Tracer for X-Rays in Disks around Tauri Stars?

Details Is NeII a Tracer for X-Rays in Disks around Tauri Stars? Is NeII a Tracer for X-Rays in Disks around Tauri Stars?

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop....3g&link_type=abstract

XMM-Newton Proposal ID #05501206

Computer Science

Stars, White Dwarfs, Solar System, Gw Lup, Haro 1-17/Doar, Gq Lup, Iras 18268-0025, Iras 08267-3336, T Cha, Xmm-Newton Proposal Id #05501206

Scientific paper

Although dust grains dominate the appearance of protoplanetary disks because of their high opacity, the key processes for disk evolution and planetesimal formation are driven through the dynamical state of the gas. In contrast to the dust component, we do not have a similar knowledge of the gas component. One of the Spitzer breakthroughs was the detection of the [Ne II] 12.8um line. Glassgold et al. (2007) proposed that this line provides diagnostics for a warm disk surface layer that is heated and ionized by stellar X-rays. A correlation of the [Ne II] luminosity with the X-ray luminosity is expected. The statistical sample so far available is insufficient to test this hypothesis. We aim at significantly enlarging the sample, with the goal of confirming or refuting this model.

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