On the absence of coronal line emission from Orion population stars

Details On the absence of coronal line emission from Orion population stars On the absence of coronal line emission from Orion population stars

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...106...25g&link_type=abstract

Astronomy and Astrophysics, vol. 106, no. 1, Feb. 1982, p. 25-28. Research supported by the Statens Naturvitenskapliga Forsknin

Astronomy and Astrophysics

Astrophysics

10

Forbidden Bands, Line Spectra, Orion Constellation, Stellar Coronas, Stellar Spectra, T Tauri Stars, X Rays, Carbon, Emission Spectra, Iron, Luminous Intensity, Silicon

Scientific paper

The coronal forbidden line Fe XIV 5303 A and Fe X 6374.5 A emission were unsuccessfully sought in 14 young stars of the Orion population. It is demonstrated for the case of several stars that the intensity of any 1,000,000 K corona is less than 10,000 times that of the sun, while such emission lines as C IV and Si IV, forming in regions with temperatures of 100,000 K, are enhanced by 10,000-1,000,000 times the solar values. Earlier suggestions to the effect that strong-line T Tauri stars have intensive coronal emission absorbed in extensive circumstellar gas are not supported in light of the present study.

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