%0 Generic %1 zhang2017impact %A Zhang, Hong-Xin %A Puzia, Thomas H. %A Weisz, Daniel R. %D 2017 %K dwarf galaxies local sfh %T The Impact of Star Formation Histories on Stellar Mass Estimation: Implications from the Local Group Dwarf Galaxies %U http://arxiv.org/abs/1710.04214 %X Local Group (LG) galaxies have relatively accurate SFHs and metallicity evolution derived from resolved CMD modeling, and thus offer a unique opportunity to explore the efficacy of estimating stellar mass M$_\star$ of real galaxies based on integrated stellar luminosities. Building on the SFHs and metallicity evolution of 40 LG dwarf galaxies, we carried out a comprehensive study of the influence of SFHs, metallicity evolution and dust extinction on the UV-to-NIR color-$M/L$ (color-log$\Upsilon_\star$($łambda$)) relations and M$_\star$ estimation of local universe galaxies. We find that: The LG galaxies follow color-log$\Upsilon_\star$($łambda$) relations that fall in between the ones calibrated by previous studies; Optical color-log$\Upsilon_\star$($łambda$) relations at higher metallicities (M/H) are generally broader and steeper; The SFH "concentration" does not significantly affect the color-log$\Upsilon_\star$($łambda$) relations; Light-weighted ages and M/H together constrain log$\Upsilon_\star$($łambda$) with uncertainties ranging from $łesssim$ 0.1 dex for the NIR up to 0.2 dex for the optical passbands; Metallicity evolution induces significant uncertainties to the optical but not NIR $\Upsilon_\star$($łambda$) at given light-weighted ages and M/H; The $V$ band is the ideal luminance passband for estimating $\Upsilon_\star$($łambda$) from single colors, because the combinations of $\Upsilon_\star$($V$) and optical colors such as $B-V$ and $g-r$ exhibit the weakest systematic dependence on SFHs, M/H and dust extinction; Without any prior assumption on SFHs, M$_\star$ is constrained with biases $łesssim$ 0.3 dex by the optical-to-NIR SED fitting. Optical passbands alone constrain M$_\star$ with biases $łesssim$ 0.4 dex (or $łesssim$ 0.6 dex) when dust extinction is fixed (or variable) in SED fitting. abridged

@misc{zhang2017impact, abstract = {Local Group (LG) galaxies have relatively accurate SFHs and metallicity evolution derived from resolved CMD modeling, and thus offer a unique opportunity to explore the efficacy of estimating stellar mass M$_{\star}$ of real galaxies based on integrated stellar luminosities. Building on the SFHs and metallicity evolution of 40 LG dwarf galaxies, we carried out a comprehensive study of the influence of SFHs, metallicity evolution and dust extinction on the UV-to-NIR color-$\mathcal{M/L}$ (color-log$\Upsilon_{\star}$($\lambda$)) relations and M$_{\star}$ estimation of local universe galaxies. We find that: The LG galaxies follow color-log$\Upsilon_{\star}$($\lambda$) relations that fall in between the ones calibrated by previous studies; Optical color-log$\Upsilon_{\star}$($\lambda$) relations at higher metallicities ([M/H]) are generally broader and steeper; The SFH "concentration" does not significantly affect the color-log$\Upsilon_{\star}$($\lambda$) relations; Light-weighted ages and [M/H] together constrain log$\Upsilon_{\star}$($\lambda$) with uncertainties ranging from $\lesssim$ 0.1 dex for the NIR up to 0.2 dex for the optical passbands; Metallicity evolution induces significant uncertainties to the optical but not NIR $\Upsilon_{\star}$($\lambda$) at given light-weighted ages and [M/H]; The $V$ band is the ideal luminance passband for estimating $\Upsilon_{\star}$($\lambda$) from single colors, because the combinations of $\Upsilon_{\star}$($V$) and optical colors such as $B-V$ and $g-r$ exhibit the weakest systematic dependence on SFHs, [M/H] and dust extinction; Without any prior assumption on SFHs, M$_{\star}$ is constrained with biases $\lesssim$ 0.3 dex by the optical-to-NIR SED fitting. Optical passbands alone constrain M$_{\star}$ with biases $\lesssim$ 0.4 dex (or $\lesssim$ 0.6 dex) when dust extinction is fixed (or variable) in SED fitting. [abridged]}, added-at = {2017-10-13T10:22:40.000+0200}, author = {Zhang, Hong-Xin and Puzia, Thomas H. and Weisz, Daniel R.}, biburl = {https://www.bibsonomy.org/bibtex/2f5700b7599a8d29ceb3bbf14d1d9f119/miki}, description = {[1710.04214] The Impact of Star Formation Histories on Stellar Mass Estimation: Implications from the Local Group Dwarf Galaxies}, interhash = {16b81e87f71bbc513ad2aaaa84ae2149}, intrahash = {f5700b7599a8d29ceb3bbf14d1d9f119}, keywords = {dwarf galaxies local sfh}, note = {cite arxiv:1710.04214Comment: 35 pages, 31 figures, 2 tables, accepted by ApJS}, timestamp = {2017-10-13T10:22:40.000+0200}, title = {The Impact of Star Formation Histories on Stellar Mass Estimation: Implications from the Local Group Dwarf Galaxies}, url = {http://arxiv.org/abs/1710.04214}, year = 2017 }