Spitzer IRS observations of protoplanetary disks around low-mass stars

Details Spitzer IRS observations of protoplanetary disks around low-mass stars Spitzer IRS observations of protoplanetary disks around low-mass stars

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20517407k&link_type=abstract

American Astronomical Society Meeting 205, #174.07; Bulletin of the American Astronomical Society, Vol. 37, p.378

Astronomy and Astrophysics

Astronomy

1

Scientific paper

This work is part of the c2d Spitzer legacy program designed to study the evolution of circumstellar matter 'From Molecular Cores to Planet-Forming Disks.' This program utilizes the improved sensitivity of the Spitzer InfraRed Spectrograph (IRS) to greatly expand the study of infrared emission features in solar-mass stars, which previously were restricted primarily to ground based studies in the 10 micron region. Through the observation of 5--35 micron spectra toward a variety of solar-type PMS stars, a database analogous to ISO studies of high/intermediate mass stars will be created. To date, near to mid infrared spectra have been obtained for 50 T Tauri stars with circumstellar disks (class II) with ages up to 5 Myr. These spectra probe the changing physical conditions of disks and the chemical structure of silicates and polycyclic aromatic hydrocarbons (PAHs) as grains evolve and grow into planetesimals. In the spectra observed thus far, PAH emission is observed toward 10 stars, among which the 11.2 micron feature is most prominent and 6.2 to 8.6 micron features are not frequently observed. The connection between the observed PAH features and interstellar/circumstellar environment is being explored. Silicate emission is observed at 10 and 20 microns toward a large fraction of the sample and appears to arise from primarily amorphous silicates with grain sizes between 0.1 and 5 microns. The spectral SEDs will be compared to the categories established for intermediate mass Herbig Ae/Be s tars to explore the connections between the dust size/composition and disk geometry (Meeus et al. 2001).
The c2d Spitzer Legacy project is funded through NASA contract number 1407. JEK-S is supported by NASA through the Spitzer Postdoctoral Fellowship Program, under award 1256316.

Affiliated with

Also associated with

No associations

Rating

Spitzer IRS observations of protoplanetary disks around low-mass stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spitzer IRS observations of protoplanetary disks around low-mass stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spitzer IRS observations of protoplanetary disks around low-mass stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1645692