A change in the reddening of R Aquarii

Details A change in the reddening of R Aquarii A change in the reddening of R Aquarii

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96...78b&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, Jan. 1984, p. 78-83.

Astronomy and Astrophysics

Astronomy

7

Interstellar Extinction, Nebulae, Stellar Envelopes, Stellar Spectra, Variable Stars, Eclipsing Binary Stars, Stellar Mass, Stellar Models

Scientific paper

The authors observed the hydrogen and helium recombination spectrum of R Aqr in 1979 and 1982 to investigate possible changes in the circumstellar reddening. From KPNO data obtained with the IRS and IIDS systems they have found equivalent E(B-V) values of 0.40±0.05 and 0.15±0.05 in 1979 and 1982, respectively. These results may be compared with values of approximately 1.00 obtained in 1977 and 0.60 for the data taken between 1977 and 1979. This indicates that the emission region as well as the long-period variable was partially obscured during the suggested eclipse of 1977. Models of the R Aqr system require intrinsic as well as geometrical changes. Various limits on the geometry, activity, and masses are suggested.

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