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Science 2 April 1982:
Vol. 216. no. 4541, pp. 54 - 55
DOI: 10.1126/science.216.4541.54
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Articles

Search for Interstellar Superheavy Hydrogen

M. JURA 1 and D. G. YORK 2

1 Department of Astronomy, University of California, Los Angeles 90024
2 Princeton University Observatory, Princeton, New Jersey 08544

Models for fundamental physical interactions allow for the existence of stable or nearly stable elementary particles much heavier than the proton. Stellar spectra were searched for a positively charged superheavy particle, X+, which, with a bound electron, should appear as apparently superheavy neutral hydrogen in the interstellar medium. An upper limit for the abundance of X relative to normal hydrogen in the line of sight toward the bright star ggr Cassiopeiae is 2 x 10–8.

Submitted on November 23, 1981

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Science. ISSN 0036-8075 (print), 1095-9203 (online)