VLBI observations of the RS Canum Venaticorum binary systems UX ARIETIS and HR 1099 at 1.65 GHz

Details VLBI observations of the RS Canum Venaticorum binary systems UX ARIETIS and HR 1099 at 1.65 GHz VLBI observations of the RS Canum Venaticorum binary systems UX ARIETIS and HR 1099 at 1.65 GHz

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...278..220m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 278, March 1, 1984, p. 220-223.

Astronomy and Astrophysics

Astronomy

22

Binary Stars, Polarization Characteristics, Radio Bursts, Radio Sources (Astronomy), Very Long Base Interferometry, Brightness Temperature, Circular Polarization, Electron Energy, Energy Distribution, Linear Polarization, Synchrotron Radiation

Scientific paper

VLBI observations of the RS CVn binaries UX Arietis and HR 1099 have been made at 1.65 GHz using a three-element array with a minimum fringe spacing of 11.5 milli-arcsec. Both sources were found to be unresolved within measurement uncertainties. In both cases, the derived upper limit to the source size was comparable to the overall size of each binary system. The lower limits to the brightness temperature were 1.4 x 10 to the 10th K for UX Arietis and 2.9 x 10 to the 10th K for HR 1099. Simultaneous polarization measurements at the VLA showed 4-8 percent circular polarization and less than 2 percent linear polarization. It is found that the data are consistent with gyrosynchrotron emission from a power-law energy distribution of electrons in a magnetic field B less than or approximately equal to 6 gauss.

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