SIMBAD references

1995A&A...296..164H - Astronomy and Astrophysics, volume 296164-168 (1995/4-1)

Accretion stream mapping in eclipsing polars. An application of MEM and genetic optimisation.

HAKALA P.J.

Abstract (from CDS):

The discovery of RE2107-05 (Hakala et al. 1993MNRAS.263...61H; Schwope et al. 1993A&A...271L..25S), the brightest of the four known eclipsing AM Her systems revealed that a significant proportion of the optical emission from AM Her systems originates within the accretion stream. This is clearly demonstrated by the asymmetric eclipse profiles obtained by Hakala et al. (1993MNRAS.263...61H). I present a new method for deriving the accretion stream brightness distribution from the eclipse profile photometry of AM Her systems using a maximum entropy method (MEM) and a Genetic Algorithm for optimisation. This technique is applied to the U band eclipse profile of RE2107-05. The qualitative results indicate, that the stream emission rises quadratically towards the white dwarf and there is a separate "hot spot" within the stream possibly due to the threading to the WD magnetosphere.

Abstract Copyright: ∼

Journal keyword(s): accretion - methods: data analysis - stars: individual: RE 2107-05 - binaries: eclipsing

Simbad objects: 2

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