Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387l..69t&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 387, March 10, 1992, p. L69-L71.
Astronomy and Astrophysics
Astrophysics
25
Neutron Stars, Planetary Evolution, Planetary Systems, Pulsars, Algorithms, Planetary Mass, Planetary Orbits, Solar System
Scientific paper
The apparent discovery of a planet around the neutron star PSR 1829-10 raises the question: are planets around pulsars rare or merely difficult to detect? To address that issue, a survey for low-mass companions in archival timing data of about 185 pulsars was conducted. The sensitivity of an algorithm for two timing-quiet pulsars, PSR 1919 + 21 and PSR 1937 + 21 is demonstrated. PSR 1919 + 21 is a typical long-period pulsar (P = 1.337 s) with an extensive history of timing observations. It has no earth-mass planets with orbital periods between tens and thousands of days. More stringent limits are derived for PSR 1937 + 21, which is a strong, millisecond pulsar. Planetary companions as small as 0.001-0.01 earth masses are excluded for orbital periods between 10 and 100 days. If the solar system were found around PSR 1937 + 21, it would be possible to detect all the planets except Pluto and Neptune.
Phillips Adrienne J.
Thorsett Stephen. E.
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