Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.4826h&link_type=abstract
HST Proposal ID #4826
Physics
Hst Proposal Id #4826
Scientific paper
WE PROPOSE TO USE THIS DIRECTOR'S DISCRETIONARY TIME TO SEARCH FOR INTERSTELLAR ABSORPTION BY GASEOUS INTERSTELLAR LEAD IN THE SPECTRUM OF 1 SCO. IN OUR CYCLE 1 DATA FROM PROGRAM 3993, WE HAVE ALREADY SIMILARLY DETECTED INTER- STELLAR TIN TOWARD THE SAME STAR. AT Z=50, TIN IS BY FAR THE HEAVIEST ELEMENT YET DETECTED IN THE INTERSTELLAR MEDIUM, AND, AT Z=82, LEAD IS STILL MUCH HEAVIER. ON QUITE FIRM GROUNDS, WE EXPECT THE 1433 A LINE OF PB II TO ATTAIN A A STRENGTH OF ABOUT 3 MA TOWARD 1 SCO, OR ABOUT 70% OF THAT OF THE SN II 1400 A LINE WHICH WE HAVE PREVIOUSLY DETECTED. SUCH A PB II LINE SHOULD BE READILY DETECTED IN THE SINGLE SPECTRAL EXPOSURE WHICH CONSTITUTES THIS PROGRAM.
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