Possible detection of Lyman alpha emission in the A7 III star Gamma Bootis

Details Possible detection of Lyman alpha emission in the A7 III star Gamma Bootis Possible detection of Lyman alpha emission in the A7 III star Gamma Bootis

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...265..643m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 265, no. 2, p. 643-646.

Astronomy and Astrophysics

Astrophysics

5

A Stars, Emission Spectra, Lyman Alpha Radiation, Stellar Spectra, Iue, Stellar Atmospheres, Stellar Coronas, Ultraviolet Spectra

Scientific paper

We analyze the archive high dispersion IUE spectrum SWP 10885 of Gamma Boo (A7 III) in the Ly-alpha region, using our own software. A faint stellar emission overlayed by a saturated interstellar absorption is detected. This result and the previous detection of Ly-alpha emission in Altair and Alpha Cep do suggest that the presence of chromospheric emission is a common characteristic of main sequence and giant stars of spectral type A7.

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