Polarimetry of ST LMi(CW1103+254)

Details Polarimetry of ST LMi(CW1103+254) Polarimetry of ST LMi(CW1103+254)

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.222..853c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 222, Oct. 15, 1986, p. 853-870. Research supported by t

Astronomy and Astrophysics

Astronomy

50

Astronomical Photometry, Cyclotron Radiation, Polar Caps, Polarimetry, Variable Stars, Astronomical Models, Linear Polarization, Shock Waves, Stellar Luminosity, Stellar Mass Accretion, X Ray Spectra

Scientific paper

Data from photometric and polarimetric observations of ST LMi, obtained in white, red, or blue light with the 1.0-m and 1.9-m telescopes at SAAO during April-June 1985, are presented in tables and graphs and characterized in detail. Findings reported include faint-phase linear polarization (attributed to accretion-column electron scattering above 5 Rwd from the surface), strong dependence of inclination (56 + or - 4 deg) and magnetic-dipole-offset (134 + or - 4 deg) on the the surface fraction (0.0009) and height (less than 0.005 Rwd) of the cyclotron (and hard-X-ray) emission region, and light-curve and polarization asymmetries (explained in terms of two connected emission regions). Parameters estimated include primary mass 0.54 + or - 0.2 solar mass, system luminosity 5 x 10 to the 32nd erg/s, and mass-transfer rate 10 to the -10th solar mass/yr.

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