Search for H2 Around Vega-like Stars

Details Search for H2 Around Vega-like Stars Search for H2 Around Vega-like Stars

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..324..256c&link_type=abstract

Debris Disks and the Formation of Planets: A Symposium in Memory of Fred Gillett, ASP Conference Series, Vol. 324, Proceedings o

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We have obtained FUSE spectra of σ Her, ζ CrA, and α CrB, nearby, dusty, late B- and early A-type main sequence stars, to search for circumstellar atomic and molecular gases. No CO or H2 is detected around any of the stars in our sample. We measure the column densities of C II and N II and place 3σ upper limits on the column densities of CO and H2. Although the inclination angles of the dusty circumstellar disks are not known, we estimate that by 140-300 Myr the gas:dust ratio is < 100, the canonical gas:dust ratio in the interstellar medium.

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