%0 Generic %1 belli2017kmos3d %A Belli, Sirio %A Genzel, Reinhard %A Schreiber, Natascha M. Förster %A Wisnioski, Emily %A Wilman, David J. %A Wuyts, Stijn %A Mendel, J. Trevor %A Beifiori, Alessandra %A Bender, Ralf %A Brammer, Gabriel B. %A Burkert, Andreas %A Chan, Jeffrey %A Davies, Rebecca L. %A Davies, Ric %A Fabricius, Maximilian %A Fossati, Matteo %A Galametz, Audrey %A Lang, Philipp %A Lutz, Dieter %A Momcheva, Ivelina G. %A Nelson, Erica J. %A Saglia, Roberto P. %A Tacconi, Linda J. %A Tadaki, Ken-ichi %A Übler, Hannah %A van Dokkum, Pieter %D 2017 %K early formation galaxies star type %T KMOS-3D Reveals Low-Level Star Formation Activity in Massive Quiescent Galaxies at 0.7 < z < 2.7 %U http://arxiv.org/abs/1703.07778 %X We explore the H-alpha emission in the massive quiescent galaxies observed by the KMOS-3D survey at 0.7 < z < 2.7. The H-alpha line is robustly detected in 20 out of 120 UVJ-selected quiescent galaxies, and we classify the emission mechanism using the H-alpha line width and the NII/H-alpha line ratio. We find that AGN are likely to be responsible for the line emission in more than half of the cases. We also find robust evidence for star formation activity in nine quiescent galaxies, which we explore in detail. The H-alpha kinematics reveal rotating disks in five of the nine galaxies. The dust-corrected H-alpha star formation rates are low (0.2 - 7 Msun/yr), and place these systems significantly below the main sequence. The 24micron-based infrared luminosities, instead, overestimate the star formation rates. These galaxies present a lower gas-phase metallicity compared to star-forming objects with similar stellar mass, and many of them have close companions. We therefore conclude that the low-level star formation activity in these nine quiescent galaxies is likely to be fueled by inflowing gas or minor mergers, and could be a sign of rejuvenation events.

@misc{belli2017kmos3d, abstract = {We explore the H-alpha emission in the massive quiescent galaxies observed by the KMOS-3D survey at 0.7 < z < 2.7. The H-alpha line is robustly detected in 20 out of 120 UVJ-selected quiescent galaxies, and we classify the emission mechanism using the H-alpha line width and the [NII]/H-alpha line ratio. We find that AGN are likely to be responsible for the line emission in more than half of the cases. We also find robust evidence for star formation activity in nine quiescent galaxies, which we explore in detail. The H-alpha kinematics reveal rotating disks in five of the nine galaxies. The dust-corrected H-alpha star formation rates are low (0.2 - 7 Msun/yr), and place these systems significantly below the main sequence. The 24micron-based infrared luminosities, instead, overestimate the star formation rates. These galaxies present a lower gas-phase metallicity compared to star-forming objects with similar stellar mass, and many of them have close companions. We therefore conclude that the low-level star formation activity in these nine quiescent galaxies is likely to be fueled by inflowing gas or minor mergers, and could be a sign of rejuvenation events.}, added-at = {2017-03-24T10:52:22.000+0100}, author = {Belli, Sirio and Genzel, Reinhard and Schreiber, Natascha M. Förster and Wisnioski, Emily and Wilman, David J. and Wuyts, Stijn and Mendel, J. Trevor and Beifiori, Alessandra and Bender, Ralf and Brammer, Gabriel B. and Burkert, Andreas and Chan, Jeffrey and Davies, Rebecca L. and Davies, Ric and Fabricius, Maximilian and Fossati, Matteo and Galametz, Audrey and Lang, Philipp and Lutz, Dieter and Momcheva, Ivelina G. and Nelson, Erica J. and Saglia, Roberto P. and Tacconi, Linda J. and Tadaki, Ken-ichi and Übler, Hannah and van Dokkum, Pieter}, biburl = {https://www.bibsonomy.org/bibtex/2b21ac91284d5ec4bbb6fe6b789b9fb85/miki}, description = {[1703.07778] KMOS-3D Reveals Low-Level Star Formation Activity in Massive Quiescent Galaxies at 0.7 &lt; z &lt; 2.7}, interhash = {e357eed56cece04b764947143c17f5fa}, intrahash = {b21ac91284d5ec4bbb6fe6b789b9fb85}, keywords = {early formation galaxies star type}, note = {cite arxiv:1703.07778Comment: 7 pages, 5 figures, submitted to ApJ Letters}, timestamp = {2017-03-24T10:52:22.000+0100}, title = {KMOS-3D Reveals Low-Level Star Formation Activity in Massive Quiescent Galaxies at 0.7 < z < 2.7}, url = {http://arxiv.org/abs/1703.07778}, year = 2017 }