Other
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7828h&link_type=abstract
HST Proposal ID #7828
Other
Hst Proposal Id #7828 Cool Stars Low-Mass Stars
Scientific paper
The nearby { 200 pc} R Aqr symbiotic system is a well-known prototype for non-relativistic astrophysical jets. The R Aqr jet has been extensively observed in the ultraviolet, optical, and radio regimes, primarily by Hollis and collaborators. Infrared imaging observations have been attempted by others but have always failed because of the extremely bright Mira- like variable in the system. Hence, this jet has never been spatially observed at infrared wavelengths because it requires a coronograph with excellent rejection characteristics. R Aqr jet imagery in the ultraviolet, optical, and radio regimes indicate compact regions of gas and dust. Our IRAS data analysis suggests the system contains extended dust structure, indicating that the infrared jet signature is consistent with an 1000 K blackbody. Jet formation mechanisms in astrophysical systems are not well understood, but proposed NICMOS coronograph observations should reveal the infrared jet in the R Aqr symbiotic system for the first time and would help confirm that the jet itself could be initiated due to accretion disk radiation pressure on dust grains. We intend to observe through a narrow band filter centered at 1.9 micron
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