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Article overview
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The Chemical Residue of a White Dwarf-Dominated Galactic Halo | Brad K. Gibson
; Jeremy R. Mould
; | Date: |
13 Dec 1996 | Subject: | astro-ph | Affiliation: | MSSSO), Jeremy R. Mould (MSSSO | Abstract: | Halo initial mass functions (IMFs), heavily-biased toward white dwarf (WD) precursors (i.e. 1->8 M_sun), have been suggested as a suitable mechanism for explaining microlensing statistics along the line of sight to the LMC. Such IMFs can apparently be invoked without violating the observed present-day WD luminosity function. By employing a simple chemical evolution argument, we demonstrate that reconciling the observed halo Population II dwarf abundances (i.e. [C,N/O]=-0.5), with that expected from the postulated ``WD-heavy’’ IMF (i.e. [C,N/O]=+0.5), is difficult. | Source: | arXiv, astro-ph/9612133 | Services: | Forum | Review | PDF | Favorites |
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