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Research outline

 Gravitational microlensing.

Microlensing 1In collaboration with A. Gould (OSU, US), search for extrasolar planets towards M31 with the LBT (Arizona, US). Principal Investigator of the PLAN collaboration for the search and the characterization of microlensing events towards M31 in the framework of the search for dark matter in form of compact objects (MACHOs) in galactic halos (the observational programme has been mainly carried out at the Astronomical Observatory of Bologna).

In collaboration with G. Ingrosso (Univ. Salento), theoretical analysis for the search of extrasolar planets in M31 and, for the line of sight towards the Galatic Bulge, of polarization effects related
to gravitational microlensing.
Analysis of the results of the observational campaigns of the collaborations MACHO, OGLE and EROS towards the Magellanic Clouds (LMC and SMC) within the framework of the search for MACHOs.
Participation to the collaboration MiNDSTEp (PIs U. Jorgensen and M. Dominik) for the search of extrasolar planets towards the Galactic Bulge with observations at the Danish telescope (La Silla, ESo, Chile).

Within the same collaboration several parallel projects are carried out, in particular the characterization of extrasolar planets with the transit method. (a programme carried out by J. Southworth)

The search and the characterizationof extrasolar planets with gravitational microlensing and the transit method are also carried out at the Astronomical Observatory of the University of Salerno.

Research groups:

   

Publications

S. Calchi Novati et al (PLAN) 2014,
"M31 pixel lensing PLAN campaign: MACHO lensing and Self lensing signals",
The Astrophysical Journal, accepted, arXiv:1401.2989

S. Calchi Novati, S. Mirzoyan, Ph. Jetzer and G. Scarpetta 2013,
"Microlensing towards the SMC: a new analysis of OGLE and EROS results",
Monthly Notices of the Royal Astronomical Society 435, 1582-1598

G. Ingrosso, S. Calchi Novati, F. De Paolis, Ph. Jetzer, A. Nucita, F. Strafella and A. Zakharov 2012,
"Polarization in microlensing events towards the Galactic bulge",
Monthly Notices of the Royal Astronomical Society 426, 1496-1506

G. Ingrosso, S. Calchi Novati, F. De Paolis, Ph. Jetzer, A. Nucita
and A. Zakharov 2011, "Search for exoplanets in M31 with pixel-lensing and the PA-99-N2 event revisited",
General Relativity and Gravitation 43, 1047-1060

S. Calchi Novati 2010, "Pixel Lensing: Microlensing towards M31", General Relativity and Gravitation 42, 2101-2126
(Invited review for a special issue on Gravitational Lensing, Ph.~Jetzer, Y.~Mellier and V.~Perlick Eds)

A. Gould et al (SCN) 2010, "Frequency of Solar-Like Systems and of Ice and Gas Giants Beyond the Snow Line from High-Magnification Microlensing Events in 2005-2008",
The Astrophysical Journal 720, 1073-1089

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