Weighing the Stellar Content of NGC 5907's Dark Matter Halo

Details Weighing the Stellar Content of NGC 5907's Dark Matter Halo Weighing the Stellar Content of NGC 5907's Dark Matter Halo

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.285l&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

We have obtained deep HST NICMOS images of the edge-on spiral NGC 5907 to determine the composition of its stellar halo. Ground-based observations find very extended faint halo light, which roughly traces the isothermal profile required to reproduce this galaxy's notorious flat rotation curve. For a normal stellar population, we should have resolved many bright giant stars in our images, but we did not. We address our resulting constraints on the stellar metallicity and initial mass function and their implications for the baryon fraction of NGC 5907's dark matter halo.

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