Detection of beta Pictoris--like Gaseous Infall in 2 Andromedae

Details Detection of beta Pictoris--like Gaseous Infall in 2 Andromedae Detection of beta Pictoris--like Gaseous Infall in 2 Andromedae

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...481..866c&link_type=abstract

Astrophysical Journal v.481, p.866

Astronomy and Astrophysics

Astronomy

10

Stars: Circumstellar Matter, Stars: Individual Constellation Name: 2 Andromedae, Line: Profiles, Ism: Clouds, Ultraviolet: Stars

Scientific paper

Ultraviolet observations of 2 Andromedae with the Goddard High Resolution Spectrograph on board the Hubble Space Telescope (HST) clearly reveal the existence of circumstellar gas, in addition to previously known anomalous interstellar features, in the line of sight toward this nearby star. We also detect varying, redshifted Ca II absorptions, which we interpret as gaseous infalls. These variable Ca II absorption features and the presence of circumstellar absorptions from Al III lambda lambda 1854.716 and 1862.790 and from excited fine-structure levels of Fe II near 2600 Angstroms seen in 2 And are similar to those observed in spectra of beta Pic.

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