Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...109..171h&link_type=abstract
Astronomy and Astrophysics, vol. 109, no. 1, May 1982, p. 171-178.
Astronomy and Astrophysics
Astrophysics
22
Astronomical Photometry, Light Curve, Novae, Polarimetry, Stellar Spectrophotometry, Brightness, Radial Velocity, Ubv Spectra, Velocity Measurement
Scientific paper
Extensive photometric and polarimetric observations of the old nova RR Pic are reported. Using published radial velocity measurements it is possible to interpret the light and colour curves within the basic model for cataclysmic variables. The total brightness of the system is caused mainly by the accretion disc and especially by a hot region located at the edge of the disc approximately opposite to the hot spot. The contribution by the hot spot itself is only very small. The polarization has two components: one constant part formed in the inner region of the disc and one variable part produced in the surroundings of the spot. The amount and phase of this variable polarization makes it necessary to locate the hot spot deeper into the disc. The orientation of the system has been determined relative to the surrounding nova filaments by means of the position angle of the constant part of the polarization. This procedure is independent of theoretical assumptions concerning the mechanism of the nova outburst and allows a discrimination between competing suggestions.
Haefner Reinhold
Metz Klaus
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