%0 Generic %1 tran2016zfire %A Tran, Kim-Vy H. %A Alcorn, Leo Y. %A Kacprzak, Glenn G. %A Nanayakkara, Themiya %A Straatman, Caroline %A Yuan, Tiantian %A Cowley, Michael %A Davé, Romeel %A Glazebrook, Karl %A Kewley, Lisa J. %A Labbé, Ivo %A Martizzi, Davidé %A Papovich, Casey %A Quadri, Ryan %A Spitler, Lee R. %A Tomczak, Adam %D 2016 %K Ha environment galaxies %T ZFIRE: Similar Stellar Growth in H$\alpha$-emitting Cluster and Field Galaxies at z~2 %U http://arxiv.org/abs/1612.01534 %X We compare galaxy scaling relations as a function of environment at $z\sim2$ with our ZFIRE survey where we have measured H$\alpha$ fluxes for 90 star-forming galaxies selected from a mass-limited $łog(M_\star/M_ødot)>9$ sample based on ZFOURGE. The cluster galaxies (37) are part of a confirmed system at z=2.095 and the field galaxies (53) are at $1.9<z<2.4$; all are in the COSMOS legacy field. There is no statistical difference between H$\alpha$-emitting cluster and field populations when comparing their star formation rate (SFR), stellar mass ($M_\star$), galaxy size ($r_eff$), SFR surface density $\Sigma$(H$\alpha_star$), and stellar age distributions. The only difference is that at fixed stellar mass, the H$\alpha$-emitting cluster galaxies are $łog(r_eff)\sim0.1$ larger than in the field. Approximately 19% of the H$\alpha$-emitters in the cluster and 26% in the field are IR-luminous ($L_IR>2\times10^11 L_ødot$). Because the LIRGs in our combined sample are $\sim5$ times more massive than the low-IR galaxies, their radii are $\sim70$% larger. To track stellar growth, we separate galaxies into those that lie above, on, and below the H$\alpha$ star-forming main sequence (SFMS) using $\Delta$SFR$(M_\star)=\pm0.2$ dex. Galaxies above the SFMS (starbursts) tend to have higher H$\alpha$ SFR surface densities and younger light-weighted stellar ages compared to galaxies below the SFMS. Our results indicate that starbursts (+SFMS) in the cluster and field at $z\sim2$ are growing their stellar cores. Lastly, we compare to the (SFR-$M_\star$) relation from RHAPSODY cluster simulations and find the predicted slope is nominally consistent with the observations. However, the predicted cluster SFRs tend to be too low by a factor of $\sim2$ which seems to be a common problem for simulations across environment.

@misc{tran2016zfire, abstract = {We compare galaxy scaling relations as a function of environment at $z\sim2$ with our ZFIRE survey where we have measured H$\alpha$ fluxes for 90 star-forming galaxies selected from a mass-limited [$\log(M_{\star}/M_{\odot})>9$] sample based on ZFOURGE. The cluster galaxies (37) are part of a confirmed system at z=2.095 and the field galaxies (53) are at $1.9<z<2.4$; all are in the COSMOS legacy field. There is no statistical difference between H$\alpha$-emitting cluster and field populations when comparing their star formation rate (SFR), stellar mass ($M_{\star}$), galaxy size ($r_{eff}$), SFR surface density [$\Sigma$(H$\alpha_{star}$)], and stellar age distributions. The only difference is that at fixed stellar mass, the H$\alpha$-emitting cluster galaxies are $\log(r_{eff})\sim0.1$ larger than in the field. Approximately 19% of the H$\alpha$-emitters in the cluster and 26% in the field are IR-luminous ($L_{IR}>2\times10^{11} L_{\odot}$). Because the LIRGs in our combined sample are $\sim5$ times more massive than the low-IR galaxies, their radii are $\sim70$% larger. To track stellar growth, we separate galaxies into those that lie above, on, and below the H$\alpha$ star-forming main sequence (SFMS) using $\Delta$SFR$(M_{\star})=\pm0.2$ dex. Galaxies above the SFMS (starbursts) tend to have higher H$\alpha$ SFR surface densities and younger light-weighted stellar ages compared to galaxies below the SFMS. Our results indicate that starbursts (+SFMS) in the cluster and field at $z\sim2$ are growing their stellar cores. Lastly, we compare to the (SFR-$M_{\star}$) relation from RHAPSODY cluster simulations and find the predicted slope is nominally consistent with the observations. However, the predicted cluster SFRs tend to be too low by a factor of $\sim2$ which seems to be a common problem for simulations across environment.}, added-at = {2016-12-07T09:38:17.000+0100}, author = {Tran, Kim-Vy H. and Alcorn, Leo Y. and Kacprzak, Glenn G. and Nanayakkara, Themiya and Straatman, Caroline and Yuan, Tiantian and Cowley, Michael and Davé, Romeel and Glazebrook, Karl and Kewley, Lisa J. and Labbé, Ivo and Martizzi, Davidé and Papovich, Casey and Quadri, Ryan and Spitler, Lee R. and Tomczak, Adam}, biburl = {https://www.bibsonomy.org/bibtex/2ffc8b7a0f77f5dcd210ab4adf49b265f/miki}, description = {[1612.01534] ZFIRE: Similar Stellar Growth in H$\alpha$-emitting Cluster and Field Galaxies at z~2}, interhash = {e98baca290524923ac09797ec267d435}, intrahash = {ffc8b7a0f77f5dcd210ab4adf49b265f}, keywords = {Ha environment galaxies}, note = {cite arxiv:1612.01534Comment: ApJ in press; full version of Table 1 available from ApJ and upon request. Survey websites are http://zfire.swinburne.edu.au and http://zfourge.tamu.edu}, timestamp = {2016-12-07T09:38:17.000+0100}, title = {ZFIRE: Similar Stellar Growth in H$\alpha$-emitting Cluster and Field Galaxies at z~2}, url = {http://arxiv.org/abs/1612.01534}, year = 2016 }