H2 emission in the EUV spectrum of T Tauri and Burnham's nebula

Details H2 emission in the EUV spectrum of T Tauri and Burnham's nebula H2 emission in the EUV spectrum of T Tauri and Burnham's nebula

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.290...34b&link_type=abstract

Nature, vol. 290, Mar. 5, 1981, p. 34-36.

Other

80

Emission Spectra, Extreme Ultraviolet Radiation, Hydrogen, Nebulae, Stellar Spectra, T Tauri Stars, Ultraviolet Spectra, Infrared Radiation, Iue, Line Spectra, Lyman Alpha Radiation, Magnesium, Solar Atmosphere, Stellar Spectrophotometry

Scientific paper

Emission in the Lyman bands of H2 has been detected in an extreme ultraviolet (EUV) spectrum of T Tauri and its adjacent nebula, obtained with the international UV explorer (IUE) satellite. This paper reports that the emission is in a progression which can be excited through fluorescence with the red wing of the H Lyman-alpha line, as found also in the solar atmosphere. The observed EUV fluxes, absence of other progressions and the flux in the previously observed 1-0 S(1) IR line support a model where collisional rather than radiative excitation leads to an excitation temperature of about 2,000 K.

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