Interstellar Lead -

Details Interstellar Lead - Interstellar Lead -

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5725h&link_type=abstract

HST Proposal ID #5725

Physics

Hst Proposal Id #5725 Interstellar Medium

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 ONE OF THE HEAVIEST ELEMENTS DETECTED IN THE INTERSTELLAR MEDIUM, AND, AT Z=82, LEAD IS THE HEAVIEST. ON QUITE FIRM GROUNDS, WE EXPECT THE 1433 A LINE OF PB II TO ATTAIN A STRENGTH OF ABOUT 1 MA TOWARD 1 SCO, OR ABOUT 25% OF THAT OF THE SN II 1400 A LINE WHICH WE HAVE PREVIOUSLY DETECTED. SUCH A PB II LINE SHOULD BE DETECTABLE IN THE SINGLE SPECTRAL EXPOSURE WHICH CONSTITUTES THIS PROGRAM.

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