Chemical and Dynamical Evolution in L1251B

Details Chemical and Dynamical Evolution in L1251B Chemical and Dynamical Evolution in L1251B

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30330l&link_type=abstract

Spitzer Proposal ID #30330

Computer Science

Scientific paper

We propose to map the isolated nearby dense core L1251B, which includes a small group of protostellar objects, with IRS in modes SL1, SL2, SH, and LH, in order to study the chemical and dynamical conditions in this region. A wide variety of observations (including IRAC and MIPS observations) have been acquired toward L1251B, and these complimentary data set will be combined with the IRS spectra, which trace the composition of icy grain mantles and shocked material. We have a self-consistent model for the process of star formation, which couples the chemical evolution with the dynamics of surrounding material and the evolution of the central luminosity. The various ice features covered by the IRS spectra are vital to constrain the dust and chemical properties in our self-consistent model. In addition, the H2 pure rotational transitions and atomic lines such as Fe II, SI, and Si II, which will constrain the strength of shock(s) and the thermal processing of shocked material, will be also covered by the proposed IRS spectral mapping. Therefore, the obtained 5-37 micron spectral data cubes acquired by the proposed observations will enable three scientific goals: (1) to constrain self-consistently our chemical and dynamical evolutionary model, (2) to examine the spatial variation of ice components from the outer envelope to the inner hot region, and (3) study the effect of shocks on the quiescent material.

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