Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...399..246h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 399, no. 1, p. 246-264.
Astronomy and Astrophysics
Astrophysics
13
Binary Stars, Starspots, Stellar Spectrophotometry, Image Processing, Light Curve, Maximum Entropy Method, Stellar Magnitude, Stellar Models
Scientific paper
The use of MEM and VRI photometry to reconstruct arbitrary spot distributions on a W UMa system similar to VW Cephei is tested. The tests involved a series of 86 test models each of which consisted of one circular spot located at some position on the surface of a modeled W UMa system. Positions of spots not located in the polar region were recovered within a +/- 3-8 deg in longitude and about +/- 20 deg in latitude. Recovery of the total bolometric flux deficit of spots was accurate within 23 percent. The resolution on the surface of the primary component obtainable from VRI photometry was found to be about 31-34 deg. Seven types of degeneracies and spurious features were identified, including features resulting from random noise in the observational data. A comparison with the method's ability to reconstruct spot distributions on a single spherical star is made. Resolution and recovery of latitude were similar to those of the VW Cep tests.
Collier Cameron Andrew
Hendry Paul D.
Mochnacki Stefan Wladyslaw
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