Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1001h&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #10.01; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We provide a summary of results from the Spitzer Legacy Program "Formation and Evolution of Planetary Systems" (FEPS). This program, summarized in Meyer et al. (2006, PASP), exploits the sensitivity of Spitzer to carry out mid-infrared spectrophotometric observations of solar-type stars.
With a sample of 328 stars ranging in age from 3 Myr to 3 Gyr, we trace the evolution of circumstellar gas and dust from primordial planet-building stages in young circumstellar disks through to older collisionally generated debris disks. Recent results from late 2006 and early 2007 include the following:
a) Bouwman et al. (2007) analyze dust size and composition in the optically--thick accretion disks in the FEPS sample using IRS high resolution observations;
b) Pascucci et al. (2006) report that gas-rich disks capable of forming Jupiter-mass planets dissipate in less than 10 Myr based in part on IRS high resolution spectra while Pascucci et al. (2007) discuss several gas line detections;
c) Meyer et al. (2007) report on the evolution of mid-IR excess emission around sun-like stars during the epoch of terrestrial planet formation 10-100 Myr;
d) Hillenbrand et al. (2007) report on the structure of cool debris disks tracing material at large radii;
e) Moro-Martin et al. (2007ab) report on a study of the possible connection between radial velocity planets and debris disks while
f) Najita et al. (2007) do the same for metallicity and debris disks. Results on debris disk evolution as traced by 3-70 um FEPS observations will be presented by Carpenter et al. (2007).
FEPS Spitzer Legacy Science Team
Hillenbrand Lynne
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