%0 Generic %1 kewley2015zfire %A Kewley, Lisa J. %A Yuan, Tiantian %A Nanayakkara, Themiya %A Kacprzak, Glenn G. %A Tran, Kim-Vy H. %A Glazebrook, Karl %A Spitler, Lee %A Cowley, Michael %A Dopita, Michael %A Straatman, Caroline %A Labbe, Ivo %A Tomczak, Adam %D 2015 %K cluster field galaxies highz ism %T Z-FIRE: ISM properties of the z = 2.095 COSMOS Cluster %U http://arxiv.org/abs/1506.07525 %X We investigate the ISM properties of 13 star-forming galaxies within the z~2 COSMOS cluster. We show that the cluster members have NII/Ha and OIII/Hb emission-line ratios similar to z~2 field galaxies, yet systematically different emission-line ratios (by ~0.17 dex) from the majority of local star-forming galaxies. We find no statistically significant difference in the NII/Ha and OIII/Hb line ratios or ISM pressures among the z~2 cluster galaxies and field galaxies at the same redshift. We show that our cluster galaxies have significantly larger ionization parameters (by up to an order of magnitude) than local star-forming galaxies. We hypothesize that these high ionization parameters may be associated with large specific star formation rates (i.e. a large star formation rate per unit stellar mass). If this hypothesis is correct, then this relationship would have important implications for the geometry and/or the mass of stars contained within individual star clusters as a function of redshift.

@misc{kewley2015zfire, abstract = {We investigate the ISM properties of 13 star-forming galaxies within the z~2 COSMOS cluster. We show that the cluster members have [NII]/Ha and [OIII]/Hb emission-line ratios similar to z~2 field galaxies, yet systematically different emission-line ratios (by ~0.17 dex) from the majority of local star-forming galaxies. We find no statistically significant difference in the [NII]/Ha and [OIII]/Hb line ratios or ISM pressures among the z~2 cluster galaxies and field galaxies at the same redshift. We show that our cluster galaxies have significantly larger ionization parameters (by up to an order of magnitude) than local star-forming galaxies. We hypothesize that these high ionization parameters may be associated with large specific star formation rates (i.e. a large star formation rate per unit stellar mass). If this hypothesis is correct, then this relationship would have important implications for the geometry and/or the mass of stars contained within individual star clusters as a function of redshift.}, added-at = {2015-06-26T09:50:47.000+0200}, author = {Kewley, Lisa J. and Yuan, Tiantian and Nanayakkara, Themiya and Kacprzak, Glenn G. and Tran, Kim-Vy H. and Glazebrook, Karl and Spitler, Lee and Cowley, Michael and Dopita, Michael and Straatman, Caroline and Labbe, Ivo and Tomczak, Adam}, biburl = {https://www.bibsonomy.org/bibtex/284574be101897d7033fb6976ec305128/miki}, description = {[1506.07525] Z-FIRE: ISM properties of the z = 2.095 COSMOS Cluster}, interhash = {28ec90a55edd7ed60855217bf793b207}, intrahash = {84574be101897d7033fb6976ec305128}, keywords = {cluster field galaxies highz ism}, note = {cite arxiv:1506.07525Comment: 11 pages, 5 figures, accepted for publication in ApJ}, timestamp = {2015-06-26T09:50:47.000+0200}, title = {Z-FIRE: ISM properties of the z = 2.095 COSMOS Cluster}, url = {http://arxiv.org/abs/1506.07525}, year = 2015 }