SIMBAD references

2016MNRAS.455.3824G - Mon. Not. R. Astron. Soc., 455, 3824-3828 (2016/February-1)

M dwarfs and the fraction of high carbon-to-oxygen stars in the solar neighbourhood.

GIZIS J.E., MARKS Z. and HAUSCHILDT P.H.

Abstract (from CDS):

We investigate the frequency of high carbon-to-oxygen (C/O = 0.9) M dwarf stars in the solar neighbourhood. Using synthetic spectra, we find that such M dwarfs would have weaker TiO bands relative to hydride features. Similar weakening has already been detected in M-subdwarf (sdM) stars. By comparing to existing spectroscopic surveys of nearby stars, we show that less than one per cent of nearby stars have high carbon-to-oxygen ratios. This limit does not include stars with C/O = 0.9, [m/H] > 0.3, and [C/Fe] > 0.1, which we predict to have low-resolution optical spectra similar to solar metallicity M dwarfs.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): stars: abundances - stars: carbon - stars: low-mass

Simbad objects: 6

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2019.10.20-03:59:50

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