John Asher Johnson and Kevin Apps 2009 ApJ 699 933 doi:10.1088/0004-637X/699/2/933
John Asher Johnson1,3 and Kevin Apps2
Show affiliationsKnowledge of the metallicities of M dwarfs rests predominantly on the photometric calibration of Bonfils and collaborators, which predicts that M dwarfs in the solar neighborhood, including those with known planets, are systematically metal poor compared to their higher-mass counterparts. We test this prediction using a volume-limited sample of low-mass stars, together with a subset of M dwarfs with high-metallicity, F, G, and K wide binary companions. We find that the Bonfils et al. photometric calibration systematically underestimates the metallicities of our high-metallicity M dwarfs by an average of 0.32 dex. We derive a new photometric metallicity calibration and show that M dwarfs with planets appear to be systematically metal rich, a result that is consistent with the metallicity distribution of FGK dwarfs with planets.
Issue 2 (2009 July 10)
Received 2009 February 12, accepted for publication 2009 April 21
Published 2009 June 17
John Asher Johnson and Kevin Apps 2009 ApJ 699 933
Steven S. Vogt et al. 2005 ApJ 632 638
P Thomas Vernier et al 2006 Phys. Biol. 3 233
Wen Fu-Sheng et al 2008 Chinese Phys. B 17 2263
Gavin K Brennen et al 2007 New J. Phys. 9 138
L Bombelli and E Calzetta 1992 Class. Quantum Grav. 9 2573
R. P. Butler et al. 2006 ApJ 646 505
David Marreiro et al 2007 J. Phys.: Condens. Matter 19 215203
C Q Geng et al JCAP09(2007)010
E G Adelberger 2001 Class. Quantum Grav. 18 2397