we attempt to make high resolution spectroscopic observations of chromospherically active stars. the aim of the project is the confirmation of the presence of photospheric emission lines from mg i and chromospheric emission lines from h i(7-6), both in the wavelength range around 12 microns. these lines have been observed previously in the sun. they show a strengthen towards the solar limb and the mg i lines also show a large zeeman sensitivity compared with transitions in the optical (5-10 times). these lines should appear enhanced in very active stars. the proposed observations will provide important diagnostics of stellar magnetic fields. we will obtain simultaneous spectra at shorter wavelenghts, for the pfund(beta), brackett(alpha) and brackett(beta) at 4.625, 4.051 and 2.625 microns, respectively, with lower resolution, in order to compare with other chromospheric lines which have been observed previously by us in other spectral ranges.
Instrument
SWS06
Temporal Coverage
1996-09-29T05:42:15Z/1998-03-01T17:22:59Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the world's first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
