Constraints on the slope of the dark halo mass function by microlensing observables

Details Constraints on the slope of the dark halo mass function by microlensing observables Constraints on the slope of the dark halo mass function by microlensing observables

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...374..494c&link_type=abstract

Astronomy and Astrophysics, v.374, p.494-503 (2001)

Astronomy and Astrophysics

Astrophysics

2

Galaxy: Halo, Galaxy: Structure, Dark Matter

Scientific paper

We investigate the dark halo lens mass function (MF) for a wide class of spheroidal non singular isothermal models comparing observed and observable microlensing quantities for MACHO observations towards LMC and taking into account the detection efficiency. We evaluate the microlensing observable quantities, i.e. observable optical depth, number of events and mean duration, for models with homogenous power-law MF changing the upper and lower mass limits and the flattening of the dark halo. By applying the simple technique of the inverse problem method we are then able to get some interesting constraints on the slope alpha of the MF and on the dark halo mass fraction f made out by MACHOs consistently with previous results. In memory of Ruggiero de Ritis, deceased September 2000.

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