Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...262..650f&link_type=abstract
Astrophysical Journal, Part 1, vol. 262, Nov. 15, 1982, p. 650-656.
Astronomy and Astrophysics
Astronomy
12
Infrared Astronomy, Radio Astronomy, Stellar Mass Ejection, Stellar Radiation, Wolf-Rayet Stars, Black Body Radiation, Photosphere, Stellar Envelopes, Stellar Spectrophotometry
Scientific paper
VLA radio observations at 1.3 cm of the Wolf-Rayet star MR 111 are reported. The collected fluxes over a frequency range from 1.65 micron to 6 cm are considered and separated into two components: a stellar blackbody and an extended envelope emission. The envelope emission is interpreted in terms of an ionized accelerated outflow due to mass loss. The parameters that define the outflow, i.e., the mass loss and the shape of the velocity curve, as well as the stellar photospheric radius, are derived from a best fit of the available data. MR 111 is found to be a WN-type star, with a radius of 25 solar radii losing mass at a rate of 0.000025 solar mass/yr with acceleration occurring in the inner part of the outflow.
Felli Marcello
Panagia Nino
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