Red dwarfs in the coronae of galaxies as MACHO objects

Details Red dwarfs in the coronae of galaxies as MACHO objects Red dwarfs in the coronae of galaxies as MACHO objects

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995azh....72..457k&link_type=abstract

Astronomicheskij Zhurnal, vol. 72, p. 457

Other

6

Milky Way Galaxy, Red Dwarf Stars, Galactic Halos, Optical Thickness, Astronomical Models, Density Distribution

Scientific paper

It is shown that three detected cases of microlensing of stars in the LMC may be in agreement with a model in which the corona of our Galaxy consists of stars with masses greater than the minimal limit for red dwarfs (M greater than 0.08 solar mass). Such an inference about the nature of MACHOs (MAssive Compact Halo Objects) was made on the basis of estimates of the optical depth of these objects under the assumption of an isothermal distribution of their density in the corona of the Galaxy, and limits for the brightness in the K filter for the coronae of several nearby 'edge-on' galaxies. This suggestion is consistent with data on the magnitude of the background at 2.2 microns in the direction perpendicular to the plane of the Galaxy.

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