No molecular gas around nearby solar-type stars

Details No molecular gas around nearby solar-type stars No molecular gas around nearby solar-type stars

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.312l...1g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 312, Issue 1, pp. L1-L3.

Astronomy and Astrophysics

Astronomy

17

Solar System: Formation, Circumstellar Matter, Planetary Systems, Radio Lines: Stars

Scientific paper

Molecular gas around main-sequence stars is thought to disperse in only a few million years, constraining the time-scale for giant planets to form. However, this hypothesis has never been fully tested, as many of the search targets have been A-type stars, where the primary gas tracer, carbon monoxide, is readily photodissociated. A survey has been made of 14 nearby F and G stars with known circumstellar dust - no CO is detected, and a mean upper limit for all the stars implies less than 0.015 Uranus masses of H2. Since these solar-like stars have negligible dissociating UV radiation, this indicates that the lack of gas detections is not an observational bias, and also that theories with formation of the outer gas giants at late times are not supported.

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