Show simple item record

dc.contributor.authorSuresh, J
dc.contributor.authorBird, S
dc.contributor.authorVogelsberger, M
dc.contributor.authorGenel, S
dc.contributor.authorTorrey, P
dc.contributor.authorSijacki, D
dc.contributor.authorSpringel, V
dc.contributor.authorHernquist, L
dc.date.accessioned2019-05-29T14:03:22Z
dc.date.available2019-05-29T14:03:22Z
dc.date.issued2015
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/293212
dc.description.abstractGalactic feedback strongly affects the way galactic environments are enriched. We examine this connection by performing a suite of cosmological hydrodynamic simulations, exploring a range of parameters based on the galaxy formation model developed in Vogelsberger et al. 2013 (henceforth V13). We examine the effects of AGN feedback, wind mass loading, wind specific energy, and wind metal-loading on the properties of the circumgalactic medium (CGM) of galaxies with $M_\text{halo} > 10^{11} M_\odot$. Note that while the V13 model was tuned to match observations including the stellar mass function, no explicit tuning was done for the CGM. The wind energy per unit outflow mass has the most significant effect on the CGM enrichment. High energy winds launch metals far beyond the virial radius. AGN feedback also has a significant effect, but only at $z < 3$. We compare to high redshift HI and CIV observations. All our simulations produce the observed number of Damped Lyman-$\alpha$ Absorbers. At lower column density, several of our simulations produce enough Lyman Limit Systems (LLS) $100$ kpc from the galaxy, but in all cases the LLS abundance falls off with distance faster than observations, with too few LLS at $200$ kpc. Further, in all models the CIV abundance drops off too sharply with distance, with too little CIV $100$-$200$ kpc from the galaxy. Higher energy wind models produce more extended CIV but also produce less stars, in tension with star-formation rate density observations. This highlights the fact that circumgalactic observations are a strong constraint on galactic feedback models.
dc.publisherOxford University Press (OUP)
dc.titleThe impact of galactic feedback on the circumgalactic medium
dc.typeArticle
prism.endingPage909
prism.issueIdentifier1
prism.publicationDate2015
prism.publicationNameMonthly Notices of the Royal Astronomical Society
prism.startingPage895
prism.volume448
dc.identifier.doi10.17863/CAM.40360
rioxxterms.versionofrecord10.1093/mnras/stu2762
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2015-03-21
dc.contributor.orcidSijacki, Debora [0000-0002-3459-0438]
dc.identifier.eissn1365-2966
rioxxterms.typeJournal Article/Review
pubs.funder-project-idScience and Technology Facilities Council (ST/L000725/1)
cam.issuedOnline2015-02-09


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record