Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-01-13
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Paper in the proceedings of the "Twelfth Marcel Grosmann Meeting", held in Paris (France), 12-18, July, 2009
Scientific paper
We show that exoplanets in the M31 galaxy may be detected with the pixel-lensing method by using telescopes making high cadence observations of an ongoing microlensing event. Although the mean mass for detectable exoplanets is about $2 M_{\rm {J}}$, even small mass exoplanets ($M_{\rm P} < 20 M_{\oplus}$) can cause significant deviations, which are observable with large telescopes. We reanalysed the POINT-AGAPE microlensing event PA-99-N2. First, we test the robustness of the binary lens conclusion for this light curve. Second, we show that for such long duration and bright microlensing events, the efficiency for finding planetary-like deviations is strongly enhanced.
Calchi Novati Sebastiano
de Paolis Francesco
Ingrosso Gabriele
Jetzer Ph
Nucita Achille A.
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