The circumstellar disks around λ Bootis stars

Details The circumstellar disks around λ Bootis stars The circumstellar disks around λ Bootis stars

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..353k&link_type=abstract

The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 353

Computer Science

Λ Bootis Stars, Circumstellar Discs, Hydrogen Lines

Scientific paper

We present ISO SWS spectra for the two λ Bootis stars HD 125162 (λ Boo) and HD 192640 (29 Cyg). A comparison with ATLAS9 atmospheric models using HIPPARCOS distances reveals that the absolute flux calibration is very good. A comparison between synthetic spectra and observation allows us to identify several H i-lines, mainly the Pfund-series. From the absence of any emission signature and from a detailed comparison of the equivalent widths we conclude that the H i-lines are of pure stellar origin. We note the presence of an unknown absorption feature around 3.5 μm present in both overlapping orders of the spectrograph.

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