%0 Generic %1 lyubenova2016shape %A Lyubenova, M. %A Martín-Navarro, I. %A van de Ven, G. %A Falcón-Barroso, J. %A Galbany, L. %A Gallazzi, A. %A García-Benito, R. %A Delgado, R. González %A Husemann, B. %A La Barbera, F. %A Marino, R. A. %A Mast, D. %A Mendez-Abreu, J. %A Peletier, R. F. P. %A Sánchez-Blázquez, P. %A Sánchez, S. F. %A Trager, S. C. %A Bosch, R. C. E. van den %A Vazdekis, A. %A Walcher, C. J. %A Zhu, L. %A Zibetti, S. %A Ziegler, B. %A Bland-Hawthorn, J. %A collaboration, the CALIFA %D 2016 %K early imf type variation %T IMF shape constraints from stellar populations and dynamics from CALIFA %U http://arxiv.org/abs/1606.07448 %X In this letter we describe how we use stellar dynamics information to constrain the shape of the stellar IMF in a sample of 27 early-type galaxies from the CALIFA survey. We obtain dynamical and stellar mass-to-light ratios, $\Upsilon_dyn$ and $\Upsilon_\ast$, over a homogenous aperture of 0.5~$R_e$. We use the constraint $\Upsilon_dyn \Upsilon_\ast$ to test two IMF shapes within the framework of the extended MILES stellar population models. We rule out a single power law IMF shape for 75% of the galaxies in our sample. Conversely, we find that a double power law IMF shape with a varying high-mass end slope is compatible (within 1$\sigma$) with 95% of the galaxies. We also show that dynamical and stellar IMF mismatch factors give consistent results for the systematic variation of the IMF in these galaxies.

@misc{lyubenova2016shape, abstract = {In this letter we describe how we use stellar dynamics information to constrain the shape of the stellar IMF in a sample of 27 early-type galaxies from the CALIFA survey. We obtain dynamical and stellar mass-to-light ratios, $\Upsilon_\mathrm{dyn}$ and $\Upsilon_{\ast}$, over a homogenous aperture of 0.5~$R_{e}$. We use the constraint $\Upsilon_\mathrm{dyn} \ge \Upsilon_{\ast}$ to test two IMF shapes within the framework of the extended MILES stellar population models. We rule out a single power law IMF shape for 75% of the galaxies in our sample. Conversely, we find that a double power law IMF shape with a varying high-mass end slope is compatible (within 1$\sigma$) with 95% of the galaxies. We also show that dynamical and stellar IMF mismatch factors give consistent results for the systematic variation of the IMF in these galaxies.}, added-at = {2016-06-28T08:48:19.000+0200}, author = {Lyubenova, M. and Martín-Navarro, I. and van de Ven, G. and Falcón-Barroso, J. and Galbany, L. and Gallazzi, A. and García-Benito, R. and Delgado, R. González and Husemann, B. and La Barbera, F. and Marino, R. A. and Mast, D. and Mendez-Abreu, J. and Peletier, R. F. P. and Sánchez-Blázquez, P. and Sánchez, S. F. and Trager, S. C. and Bosch, R. C. E. van den and Vazdekis, A. and Walcher, C. J. and Zhu, L. and Zibetti, S. and Ziegler, B. and Bland-Hawthorn, J. and collaboration, the CALIFA}, biburl = {https://www.bibsonomy.org/bibtex/27ae27e6300f362cc0e2a7034a3efee81/miki}, description = {IMF shape constraints from stellar populations and dynamics from CALIFA}, interhash = {e68af1ef243911e11c040ad45621052b}, intrahash = {7ae27e6300f362cc0e2a7034a3efee81}, keywords = {early imf type variation}, note = {cite arxiv:1606.07448Comment: 6 pages, 3 figures, accepted for publication in MNRAS Letters}, timestamp = {2016-06-28T08:48:19.000+0200}, title = {IMF shape constraints from stellar populations and dynamics from CALIFA}, url = {http://arxiv.org/abs/1606.07448}, year = 2016 }