Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.286p&link_type=abstract
The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole
Astronomy and Astrophysics
Astronomy
Scientific paper
Over the last decade, there has been great progress in the study of protoplanetary disks around T Tauri stars; in particular, the chemistry observed both in the IR and sub-mm. However, observations are currently restricted by the spatial and spectral resolution of telescopes, potentially for determining chemical processes in the inner (r < 10 AU) disk regions. The sub-mm range is associated with the colder, ''pre-planetary forming'' midplane regions. Previous theoretical work has focused on chemical evolution with stellar accretion rates of 10-7 and 10-8 solar masses/year, along the line of accretion; in each case evolving from dark cloud chemistry at 10 K. We present chemical data, in the form of abundance contour maps, from a simulated hydrostatic inner (r < 10 AU) protoplanetary disk, for species already observed in the sub-mm. In particular, we present data for 10-8 solar masses/year, which has evolved from the simulation at 10-7 solar masses/year, thereby simulating chemical evolution from one epoch to the next, in a ''dynamical'' way. Species which show little or no change in abundance and those which show the most change between ''static'' and ''dynamic'' 10-8 solar masses/year data will be discussed, as potential chemical tracers of accretion rate.
Markwick Andrew
Paska A.
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