%0 Generic %1 shivaei2016mosdef %A Shivaei, Irene %A Kriek, Mariska %A Reddy, Naveen A. %A Shapley, Alice E. %A Barro, Guillermo %A Conroy, Charlie %A Coil, Alison L. %A Freeman, William R. %A Mobasher, Bahram %A Siana, Brian %A Sanders, Ryan %A Price, Sedona H. %A Azadi, Mojegan %A Pasha, Imad %A Inami, Hanae %D 2016 %K FIR Ha UV galaxies sfr %T The MOSDEF Survey: The strong agreement between H-alpha and UV-to-FIR star formation rates for z~2 star-forming galaxies %U http://arxiv.org/abs/1603.02284 %X We present the first direct comparison between Balmer line and panchromatic SED-based SFRs for z~2 galaxies. For this comparison we used 17 star-forming galaxies selected from the MOSFIRE Deep Evolution Field (MOSDEF) survey, with $3\sigma$ detections for H$\alpha$ and at least two IR bands (Spitzer/MIPS 24$\mu$m and Herschel/PACS 100 and 160$\mu$m, and in some cases Herschel/SPIRE 250, 350, and 500$\mu$m). The galaxies have total IR (8-1000$\mu$m) luminosities of $\sim10^11.4-10^12.4\,L_ødot$ and star-formation rates (SFRs) of $\sim30-250\,M_ødot\,yr^-1$. We fit the UV-to-far-IR SEDs with flexible stellar population synthesis (FSPS) models - which include both stellar and dust emission - and compare the inferred SFRs with the SFR(H$\alpha$,H$\beta$) values corrected for dust attenuation using Balmer decrements. The two SFRs agree with a scatter of 0.17 dex. Our results imply that the Balmer decrement accurately predicts the obscuration of the nebular lines and can be used to robustly calculate SFRs for star-forming galaxies at z~2 with SFRs up to $\sim200\,M_ødot\,yr^-1$. We also use our data to assess SFR indicators based on modeling the UV-to-mid-IR SEDs or by adding SFR(UV) and SFR(IR), for which the latter is based on the mid-IR only or on the full IR SED. All these SFRs show a poorer agreement with SFR(H$\alpha$,H$\beta$) and in some cases large systematic biases are observed. Finally, we show that the SFR and dust attenuation derived from the UV-to-near-IR SED alone are unbiased when assuming a delayed exponentially declining star-formation history.

@misc{shivaei2016mosdef, abstract = {We present the first direct comparison between Balmer line and panchromatic SED-based SFRs for z~2 galaxies. For this comparison we used 17 star-forming galaxies selected from the MOSFIRE Deep Evolution Field (MOSDEF) survey, with $3\sigma$ detections for H$\alpha$ and at least two IR bands (Spitzer/MIPS 24$\mu$m and Herschel/PACS 100 and 160$\mu$m, and in some cases Herschel/SPIRE 250, 350, and 500$\mu$m). The galaxies have total IR (8-1000$\mu$m) luminosities of $\sim10^{11.4}-10^{12.4}\,\textrm{L}_\odot$ and star-formation rates (SFRs) of $\sim30-250\,\textrm{M}_\odot\,\mathrm{yr^{-1}}$. We fit the UV-to-far-IR SEDs with flexible stellar population synthesis (FSPS) models - which include both stellar and dust emission - and compare the inferred SFRs with the SFR(H$\alpha$,H$\beta$) values corrected for dust attenuation using Balmer decrements. The two SFRs agree with a scatter of 0.17 dex. Our results imply that the Balmer decrement accurately predicts the obscuration of the nebular lines and can be used to robustly calculate SFRs for star-forming galaxies at z~2 with SFRs up to $\sim200\,\textrm{M}_\odot\,\mathrm{yr^{-1}}$. We also use our data to assess SFR indicators based on modeling the UV-to-mid-IR SEDs or by adding SFR(UV) and SFR(IR), for which the latter is based on the mid-IR only or on the full IR SED. All these SFRs show a poorer agreement with SFR(H$\alpha$,H$\beta$) and in some cases large systematic biases are observed. Finally, we show that the SFR and dust attenuation derived from the UV-to-near-IR SED alone are unbiased when assuming a delayed exponentially declining star-formation history.}, added-at = {2016-03-09T09:44:02.000+0100}, author = {Shivaei, Irene and Kriek, Mariska and Reddy, Naveen A. and Shapley, Alice E. and Barro, Guillermo and Conroy, Charlie and Coil, Alison L. and Freeman, William R. and Mobasher, Bahram and Siana, Brian and Sanders, Ryan and Price, Sedona H. and Azadi, Mojegan and Pasha, Imad and Inami, Hanae}, biburl = {https://www.bibsonomy.org/bibtex/2e8d4683a7830965fca223d6a02e36da0/miki}, description = {[1603.02284] The MOSDEF Survey: The strong agreement between H-alpha and UV-to-FIR star formation rates for z~2 star-forming galaxies}, interhash = {fcb88cf51ab71e59dd52d1fe3e7e064f}, intrahash = {e8d4683a7830965fca223d6a02e36da0}, keywords = {FIR Ha UV galaxies sfr}, note = {cite arxiv:1603.02284Comment: 7 pages, 5 figures, to be published in ApJ Letters}, timestamp = {2016-03-09T09:44:02.000+0100}, title = {The MOSDEF Survey: The strong agreement between H-alpha and UV-to-FIR star formation rates for z~2 star-forming galaxies}, url = {http://arxiv.org/abs/1603.02284}, year = 2016 }