Computer Science – Learning
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7126j&link_type=abstract
HST Proposal ID #7126
Computer Science
Learning
Hst Proposal Id #7126
Scientific paper
To demonstrate the very high resolution capability of STIS, we will observe HD72089, a hot star behind the Vela supernova remnant {SNR}. Previous UV observations with IUE and HST have revealed high velocity shocked interstellar gas associated with this SNR, and analysis of excited C I in this shocked gas indicates that there is a remarkable enhancement of internal pressure in the gas that follows the shock. These studies also show substantial variation in the amount of dust grain destruction in different components of the shocked gas, and therefore this sight line provides a "laboratory" for learning about this important astrophysical process. However, the absorption profiles are extremely complex, and previous UV observations have not had sufficient resolution to adequately sort out adjacent absorption components. Furthermore, the earlier HST observations provide very limited wavelength coverage of only a few selected lines. With STIS operating in the E140H mode, we will for the first time be able to view a wide range of atomic species and ionization stages with sufficient resolution to separate the large number of adjacent absorption components. This ERO will demonstrate the power of STIS in a mode which is likely to lead to significant advances in many areas of astronomy and astrophysics.
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