Microlensing of Q2237+0305: Simulations and Statistics

• Autorzy: Jaroszyński M. , Skowron J.
• Języki publikacji: EN

Abstrakty

EN

Using Monte Carlo simulations we produce several microlensing amplification maps for each of the four images of the quasar QSO 2237+0305. With FFT algorithms we convolve the maps with the filters representing sources of different sizes and surface brightness distributions. The cuts of the convolved maps represent fragments of synthetic light curves for corresponding sources. Since FFT method is not time consuming we can examine large number of cases and obtain several statistical characteristics of image variability. A simple test involving the measured amplitude of the apparent QSO variability during ≈5 years of OGLE III observations gives an estimate of the relative source velocity, 4000±2000 km/s.

Słowa kluczowe

EN

quasars: individual: QSO 2237+0305; Gravitational lensing

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2006
• Tom: Vol. 56, No. 2
• Strony: 171--182
• Opis fizyczny: Bibliogr. 23 poz., rys., wykr.

Twórcy

autor

Jaroszyński M.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Skowron J.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

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