%0 Generic %1 nelson2017abundance %A Nelson, Dylan %A Kauffmann, Guinevere %A Pillepich, Annalisa %A Genel, Shy %A Springel, Volker %A Pakmor, Ruediger %A Hernquist, Lars %A Weinberger, Rainer %A Torrey, Paul %A Vogelsberger, Mark %A Marinacci, Federico %D 2017 %K blackhole cgm igm oxygen %T The abundance, distribution, and physical nature of highly ionized oxygen OVI, OVII, and OVIII in IllustrisTNG %U http://arxiv.org/abs/1712.00016 %X We explore the abundance, spatial distribution, and physical properties of the OVI, OVII, and OVIII ions of oxygen in circumgalactic and intergalactic media (the CGM, IGM, and WHIM). We use the TNG100 and TNG300 large volume cosmological magneto-hydrodynamical simulations. Modeling the ionization states of simulated oxygen, we find good agreement with observations of the low-redshift OVI column density distribution function (CDDF), and present its evolution for all three ions from z=0 to z=4. Producing mock quasar absorption line spectral surveys, we show that the IllustrisTNG simulations are fully consistent with constraints on the OVI content of the CGM from COS-Halos and other low redshift observations, producing columns as high as observed. We measure the total amount of mass and average column densities of each ion using hundreds of thousands of simulated galaxies spanning 10^11 < Mhalo/Msun < 10^15 corresponding to 10^9 < M*/Msun < 10^12 in stellar mass. The stacked radial profiles of OVI around halos of different masses are computed in 3D number density as well as 2D projected column, decomposing into the 1-halo and 2-halo terms, the latter of which begins to dominate for Milky Way mass halos in the WHIM just beyond the virial radius. Relating halo OVI to properties of the central galaxy, we find a correlation between the (g-r) color of a galaxy and the total amount of OVI in its CGM. In comparison to the COS-Halos finding, this leads to a dichotomy of columns around star-forming versus passive galaxies at fixed stellar (or halo) mass. We demonstrate that this correlation is a direct result of blackhole feedback associated with quenching, which also produces additional trends with other galaxy properties, and represents a causal consequence of galactic-scale baryonic feedback impacting the physical state of the circumgalactic medium.

@misc{nelson2017abundance, abstract = {We explore the abundance, spatial distribution, and physical properties of the OVI, OVII, and OVIII ions of oxygen in circumgalactic and intergalactic media (the CGM, IGM, and WHIM). We use the TNG100 and TNG300 large volume cosmological magneto-hydrodynamical simulations. Modeling the ionization states of simulated oxygen, we find good agreement with observations of the low-redshift OVI column density distribution function (CDDF), and present its evolution for all three ions from z=0 to z=4. Producing mock quasar absorption line spectral surveys, we show that the IllustrisTNG simulations are fully consistent with constraints on the OVI content of the CGM from COS-Halos and other low redshift observations, producing columns as high as observed. We measure the total amount of mass and average column densities of each ion using hundreds of thousands of simulated galaxies spanning 10^11 < Mhalo/Msun < 10^15 corresponding to 10^9 < M*/Msun < 10^12 in stellar mass. The stacked radial profiles of OVI around halos of different masses are computed in 3D number density as well as 2D projected column, decomposing into the 1-halo and 2-halo terms, the latter of which begins to dominate for Milky Way mass halos in the WHIM just beyond the virial radius. Relating halo OVI to properties of the central galaxy, we find a correlation between the (g-r) color of a galaxy and the total amount of OVI in its CGM. In comparison to the COS-Halos finding, this leads to a dichotomy of columns around star-forming versus passive galaxies at fixed stellar (or halo) mass. We demonstrate that this correlation is a direct result of blackhole feedback associated with quenching, which also produces additional trends with other galaxy properties, and represents a causal consequence of galactic-scale baryonic feedback impacting the physical state of the circumgalactic medium.}, added-at = {2017-12-04T10:31:48.000+0100}, author = {Nelson, Dylan and Kauffmann, Guinevere and Pillepich, Annalisa and Genel, Shy and Springel, Volker and Pakmor, Ruediger and Hernquist, Lars and Weinberger, Rainer and Torrey, Paul and Vogelsberger, Mark and Marinacci, Federico}, biburl = {https://www.bibsonomy.org/bibtex/2b2df716298c9b45a1bc9028dade1f56c/miki}, description = {[1712.00016] The abundance, distribution, and physical nature of highly ionized oxygen OVI, OVII, and OVIII in IllustrisTNG}, interhash = {014a7871b98bd51731bdb1d92d805af6}, intrahash = {b2df716298c9b45a1bc9028dade1f56c}, keywords = {blackhole cgm igm oxygen}, note = {cite arxiv:1712.00016Comment: Submitted to MNRAS. For an interactive OVI/OVIII visualization, see the 2D explorer at http://www.tng-project.org}, timestamp = {2017-12-04T10:31:48.000+0100}, title = {The abundance, distribution, and physical nature of highly ionized oxygen OVI, OVII, and OVIII in IllustrisTNG}, url = {http://arxiv.org/abs/1712.00016}, year = 2017 }