MACHOs: Hidden Hunks in the Halo?

Details MACHOs: Hidden Hunks in the Halo? MACHOs: Hidden Hunks in the Halo?

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.292v&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

After several years of ongoing microlensing experiments, the nature of the lenses in the Galactic halo, or MACHOs, is still unknown. The data, assuming a standard isothermal halo, imply a most likely lens mass in the white dwarf regime. However, the lens mass estimate depends upon the phase space distribution of the lenses within the halo. Recently, some authors have explored the compatibility of current data with lens masses in the substellar regime, in particular, brown dwarves. Others have considered lens candidates that are of order a solar mass or higher, such as black holes or neutron stars. In this work, we probe galactic halo model parameter space with a view to maximizing the MACHO mass estimate inferred from the current data.

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