Performance of the K-band multi-object spectrograph (KMOS) on the ESO VLT
Proceedings of SPIE SPIE, the international society for optics and photonics 9147 (2014) 91470w-91470w-9
Project overview and update on WEAVE: the next generation wide-field spectroscopy facility for the William Herschel Telescope
Proceedings of SPIE SPIE, the international society for optics and photonics 9147 (2014) 91470l-91470l-11
KMOS Clusters and VIRIAL GTO Surveys
Proceedings of the International Astronomical Union Cambridge University Press (CUP) 10:S309 (2014) 293-294
The mass-metallicity relation at z 1.4 revealed with Subaru/FMOS
Monthly Notices of the Royal Astronomical Society 437:4 (2014) 3647-3663
Abstract:
We present a stellar mass-metallicity relation at z ~ 1.4 with an unprecedentedly large sample of ~340 star-forming galaxies obtained with FibreMulti-Object Spectrograph (FMOS) on the Subaru Telescope. We observed K-band selected galaxies at 1.2 ≤ zph ≤ 1.6 in the Subaru XMM-Newton Deep Survey/Ultra Deep Survey fields with M*> 109.5M⊙, and expected F(Hα) > 5 × 10-17 erg s-1 cm-2. Among the observed ~1200 targets, 343 objects show significant Ha emission lines. The gas-phase metallicity is obtained from [N II] λ6584/Hα line ratio, after excluding possible active galactic nuclei. Due to the faintness of the [N II] λ6584 lines, we apply the stacking analysis and derive the mass-metallicity relation at z ~ 1.4. Our results are compared to past results at different redshifts in the literature. The mass-metallicity relation at z ~ 1.4 is located between those at z ~ 0.8 and z ~ 2.2; it is found that the metallicity increases with decreasing redshift from z ~ 3 to z ~ 0 at fixed stellar mass. Thanks to the large size of the sample, we can study the dependence of the mass-metallicity relation on various galaxy physical properties. The average metallicity from the stacked spectra is close to the local Fundamental Metallicity Relation (FMR) in the higher metallicity part but >0.1 dex higher in metallicity than the FMR in the lower metallicity part.We find that galaxies with larger E(B -V), B -R and R -H colours tend to show higher metallicity by ~0.05 dex at fixed stellar mass. We also find relatively clearer size dependence that objects with smaller half-light radius tend to show higher metallicity by ~0.1 dex at fixed stellar mass, especially in the low-mass part. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.Black hole mass and eddington ratio distribution functions of X-ray-selected broad-line AGNs at z ∼ 1.4 in the Subaru XMM-Newton Deep Field
Astrophysical Journal 761:2 (2012)