Measuring X-ray Heating of Circumstellar Disks: Linking Stellar X-ray Flares With Mid-IR Disk Afterglows

Details Measuring X-ray Heating of Circumstellar Disks: Linking Stellar X-ray Flares With Mid-IR Disk Afterglows Measuring X-ray Heating of Circumstellar Disks: Linking Stellar X-ray Flares With Mid-IR Disk Afterglows

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sptz.prop60205c&link_type=abstract

Spitzer Proposal ID #60205

Physics

Scientific paper

We propose to obtain Chandra ACIS-I observations of two young clusters, IC1396A and Ceph C, to test theoretical predictions of X-ray heating in circumstellar disks. Leveraging this Chandra data with extensive mid-IR light curves from our Spitzer Warm Mission program (YSOVAR), we will: 1) test if YSO X-ray and mid-IR variability are statistically correlated, indicating that stellar X-ray emission heats disks significantly, and 2) test if disk accretion rates rise following stellar X-ray flares, as expected from disk accretion models driven by magneto-rotational instabilities. Ancillary science includes: A) identification of weak T Tauri stars, to study their mid-IR variability; B) cluster extinction measurements; and C) LX/rotation relations with mid-IR periods for embedded protostars.

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