%0 Generic %1 conroy2014maintaining %A Conroy, Charlie %A van Dokkum, Pieter %A Kravtsov, Andrey %D 2014 %K agb early-type quenching %T Maintaining Low Star Formation Rates in Early-Type Galaxies with AGB Heating %U http://arxiv.org/abs/1406.3026 %X We revisit previous suggestions that the heating provided by the winds of dying low-mass stars is capable of suppressing star formation in quiescent galaxies. At the end of the asymptotic giant branch, intermediate and low-mass stars eject their envelopes rapidly in a super-wind phase, usually giving rise to planetary nebulae. In galaxies with high stellar velocity dispersions, the interaction of these ejected envelopes with the ambient diffuse gas can lead to significant, isotropic and steady-state heating that scales as $M_\ast\sigma_\ast^2$. We show that cooling of the central regions of the hot diffuse halo gas can be delayed for a Hubble time for halos more massive than $\sim10^12.5\,M_ødot$ at 0<z<2. This mechanism provides a natural explanation for the strong trend of galaxy quiescence with stellar surface density and velocity dispersion, and may obviate the need for other proposed mechanisms that maintain the low observed star formation rates of quiescent galaxies.

@misc{conroy2014maintaining, abstract = {We revisit previous suggestions that the heating provided by the winds of dying low-mass stars is capable of suppressing star formation in quiescent galaxies. At the end of the asymptotic giant branch, intermediate and low-mass stars eject their envelopes rapidly in a super-wind phase, usually giving rise to planetary nebulae. In galaxies with high stellar velocity dispersions, the interaction of these ejected envelopes with the ambient diffuse gas can lead to significant, isotropic and steady-state heating that scales as $\dot{M}_\ast\sigma_\ast^2$. We show that cooling of the central regions of the hot diffuse halo gas can be delayed for a Hubble time for halos more massive than $\sim10^{12.5}{\,M_{\odot}}$ at 0<z<2. This mechanism provides a natural explanation for the strong trend of galaxy quiescence with stellar surface density and velocity dispersion, and may obviate the need for other proposed mechanisms that maintain the low observed star formation rates of quiescent galaxies.}, added-at = {2014-06-13T09:47:55.000+0200}, author = {Conroy, Charlie and van Dokkum, Pieter and Kravtsov, Andrey}, biburl = {https://www.bibsonomy.org/bibtex/257fa89ff64ad8f40c4fa9b4f6b052eef/miki}, description = {[1406.3026] Maintaining Low Star Formation Rates in Early-Type Galaxies with AGB Heating}, interhash = {7c698cbfe91bff397657c52fd0a8d63e}, intrahash = {57fa89ff64ad8f40c4fa9b4f6b052eef}, keywords = {agb early-type quenching}, note = {cite arxiv:1406.3026Comment: 5 pages, 4 figures, submitted to ApJL}, timestamp = {2014-06-13T09:47:55.000+0200}, title = {Maintaining Low Star Formation Rates in Early-Type Galaxies with AGB Heating}, url = {http://arxiv.org/abs/1406.3026}, year = 2014 }