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Circumstellar Lines in Beta Pictoris

Published online by Cambridge University Press:  30 March 2016

Albert Boggess
Albert Boggess*
Affiliation:
Goddard Space Flight CenterGreenbelt, MD 20771, U.S.A.

Extract

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Beta Pictoris has attracted special attention since the detection of circumstellar (CS) dust emission by the Infrared Astronomy Satellite (Aumann et al 1984) and subsequent imaging of an extended disk (Smith & Terrile 1984). A central cavity in the dust disk (Telesco et al. 1988) and episodes of infalling high-density gas (Kondo & Bruhweiler 1985) have also been found. The infalling gas is highly variable in infall velocity and mass rate (Bruhweiler, Kondo & Grady 1991). Sporadic mass outflow events have also occurred, implying that some of the CS gas may be stellar ejecta.

These observations of the gas around β Pic by the Goddard High-Resolution Spectrograph (GHRS) represent a significant enhancement in velocity resolution and S/N over previous UV studies of this star and permit for the first time a simultaneous probe of the density and velocity structure of the CSgas.

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 9: Highlights of Astronomy. As presented at the XXIst General Assembly of the IAU, 1991 , 1992 , pp. 481 - 483
Copyright
Copyright © Kluwer 1992

References

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