Microlensing predictions for the Einstein cross 2237+0305

Witt, H. J.

doi:10.1007/3-540-55797-0_99

H. J. Witt¹

Part of the book series: Lecture Notes in Physics ((LNP,volume 406))

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Abstract

Some predictions for the frequency and the maximum brightness variation (in magnitude) of high magnification events (HMEs) of image A of 2237+0305 are presented. Three different models for the simulations are used. If we consider the observed brightness variation of image A in August/September 1988 (Δm = 0.2 – 0.3 mag in 26 days) the simulations indicate that it is very likely that low mass stars (< 0.1M _⊙) are contained in the centre of the lensing galaxy and that the effective transverse velocity between the caustic network and the source must be vT >≈ 5000 km/s.

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References

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Hamburger Sternwarte, Gojenbergsweg 112, D-2050, Hamburg 80, Germany
H. J. Witt

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H. J. Witt
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Rainer Kayser Thomas Schramm Lars Nieser

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Witt, H.J. (1992). Microlensing predictions for the Einstein cross 2237+0305. In: Kayser, R., Schramm, T., Nieser, L. (eds) Gravitational Lenses. Lecture Notes in Physics, vol 406. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-55797-0_99

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DOI: https://doi.org/10.1007/3-540-55797-0_99
Published: 20 July 2005
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-55797-5
Online ISBN: 978-3-540-47286-5
eBook Packages: Springer Book Archive

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