1. Authod: Ryan L. Sanders et al.(2018)
The MOSDEF Survey: A Stellar Mass–SFR–Metallicity Relation Exists at z≈2.3
Authod: Ryan L. Sanders et al.(2018)
HuangChi ,

2. Background
The MOSFIRE Deep Evolution Field (MOSDEF) survey is a large multi-year project with MOSFIRE(The Multi-Object Spectrograph for Infrared Exploration) on the 10-m Keck I telescope on Mauna Kea, Hawaii. With MOSDEF we observe the stellar, gaseous, metal, dust, and black hole content of ~1500 galaxies. This paper uses z≈2.3 data.
J band: µm ([OII] λλ3726, 3729)
H band: µm (Hβ [OIII] λλ4959,5007 )
K band: µm (Hα, [N II] λ6584, and [SII] λλ6717, 6731 )

3. Background
The mass-metallicity(M-Z) relation shows that low-luminosity, low-mass galaxies have lower metallicity than more massive galaxies, presumably due to less efficient star formation and higher metal loss during supernovae events and galactic-scale winds
Andrew&Martini(2013)

4. Sample

5. Sample

6. Sample
Andrew&Martini(2013)

7. Derived quantities

8. Derived quantities
3.Metallicity

9. Stacking

10. Results
1.M-sSFR relation

11. Results
2.M-Z relation

12. Results 2.M-SFR-Z relation(FMR) X axis: residuals around the
M-sSFR relation
Y axis: residuals around the
M-Z relation
Red squares: medians in bins of ∆log(SFR)
Stars: M-∆sSFR stacks

13. Results

14. Results

15. Results
3.FMR evolution with reshift

16. Conclusions
1.Using three different emission line ratios(O3N2,N2 and N2O2) ,
we detect a M-SFR-Z relation at z≈2.3.
2.Results based on O3 and R23 are consistent.
3.O32 do not display the presence of M-SFR-Z relation of significant redshift evolution in metallicity at fixed M and SFR.
4.The M-SFR-Z relation is similar in strength to a cosmological hydrodynamical simulation of Dave et al.(2017).
5.The M-SFR-Z relation evolves with redshift , z≈2.3 galaxies have 0.1 dex lower metallicity than z≈0 galaxies at fixed M and SFR.