The Spectrum of RR Telescopii in 1968

Details The Spectrum of RR Telescopii in 1968 The Spectrum of RR Telescopii in 1968

Jan 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ap%26ss..20...93a&link_type=abstract

Astrophysics and Space Science, Volume 20, Issue 1, pp.93-110

Astronomy and Astrophysics

Astrophysics

27

Scientific paper

The nova-like variable RR Telescopii observed at Cerro Tololo Observatory in 1968 displayed an unusually rich emission line spectrum ranging in excitation from Mg i to [Fe viii]. A list of lines with their suggested identifications and approximate intensities covers the range from λ3100 to 6700. Only a semi-quantitative discussion is possible since photographic measurements of line intensities could not be calibrated photoelectrically. The spectrum can be interpreted as coming from a highly, inhomogeneous stratified shell illuminated by an extremely hot source. Radiation of Mg i [O i], [N ii], and [S ii] arises from dense pockets shielded from ionizing radiation. The [O iii] and [Ne iv] radiation appears to originate in strata with densities of the order of 5×106 ions/cm3 and a temperature of the order of 18000 K. The abundance of iron appears to be comparable with that of neon. The helium/hydrogen ratio may be about 0.24.

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