A deep near-infrared search for halo emission from an edge-on spiral galaxy

Details A deep near-infrared search for halo emission from an edge-on spiral galaxy A deep near-infrared search for halo emission from an edge-on spiral galaxy

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.274..265c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 274, Issue 1, pp. 265-270.

Astronomy and Astrophysics

Astronomy

3

Stars: Low-Mass, Brown Dwarfs, Galaxies: Individual: Ngc 100, Galaxies: Spiral, Galaxies: Stellar Content, Dark Matter, Infrared: Galaxies

Scientific paper

Deep near-infrared imaging above and below the plane of the edge-on spiral galaxy NGC 100 has been used to place the best lower limits to date on the K-band mass-to-light ratio for a dark halo. For objects cooler than 1000 K the minimum value is 160, while a lower limit of ~ 100 can be set for halo objects of higher temperatures. Hydrogen-burning stars are strongly excluded as the dominant halo constituent, but brown dwarfs are not. A power-law IMF would require a mass dependence steeper than m^-3 to be consistent with these limits so that most of the mass would be in the form of brown dwarfs.

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