Search for exoplanets in M31 with pixel-lensing and the PA-99-N2 event revisited

Several exoplanets have been detected towards the Galactic bulge with the microlensing technique. We show that exoplanets in M31 may also be detected with the pixel-lensing method, if telescopes making high cadence observations of an ongoing microlensing event are used. Using a Monte Carlo approach...

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Bibliographic Details
Published inGeneral relativity and gravitation Vol. 43; no. 4; pp. 1047 - 1060
Main Authors Ingrosso, Gabriele, Novati, Sebastiano Calchi, De Paolis, Francesco, Jetzer, Philippe, Nucita, Achille, Zakharov, Alexander
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.04.2011
Subjects
Astronomy
Astrophysics and Cosmology
Classical and Quantum Gravitation
Differential Geometry
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum Physics
Relativity Theory
Research Article
Theoretical
Microlensing
Exoplanets
Spiral galaxies: M31
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Summary:Several exoplanets have been detected towards the Galactic bulge with the microlensing technique. We show that exoplanets in M31 may also be detected with the pixel-lensing method, if telescopes making high cadence observations of an ongoing microlensing event are used. Using a Monte Carlo approach we find that the mean mass for detectable planetary systems is about 2 M J . However, even small mass exoplanets ( ) 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 with respect to that evaluated for all planetary detectable events.
ISSN:0001-7701
1572-9532
DOI:10.1007/s10714-010-0942-3