Multiple wavelength microwave observations of the RS Canum Venaticorum stars UX Arietis, HR 1099, HR 5110, and II Pegasi

Journal Article · Wed Dec 31 23:00:00 EST 1986 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/164870· OSTI ID:6581574

Willson, R F; Lang, K R

The variabilities, core size and magnetic field of the RS CVn star UX Arietis was measured with the VLA at pairs of frequencies near 1415 MHz and 4835 MHz on June 10, 1985. Data were also gathered on HR 1099, HR 5110 and II Peg. UX Arietis exhibited variability on time scales ranging from 30 sec to 1 hr at 4835 MHz, but no detectable variations at 1415 MHz. An upper limit of 900 billion cm was placed on the size of the core emitting region, which is estimated to have a magnetic field strength of 15 G. The 30 sec variations are attributed to absorption by thermal plasma between the G5 and K1 companions of the UX Arietis system. 37 references.

• Research Organization: Tufts Univ., Medford, MA
• OSTI ID: 6581574
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 312; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
BREMSSTRAHLUNG
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
MAGNETIC FIELDS
MATHEMATICAL MODELS
MICROWAVE SPECTRA
POLARIZATION
RADIATIONS
SPECTRA
STAR MODELS
STARS
SYNCHROTRON RADIATION
VARIABLE STARS
VARIATIONS