Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29294
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Anderson, Michael E. | en_US |
dc.contributor.author | GASPARI, MASSIMO | en_US |
dc.contributor.author | White, Simon D. M. | en_US |
dc.contributor.author | Wang, Wenting | en_US |
dc.contributor.author | Dai, Xinyu | en_US |
dc.date.accessioned | 2020-12-29T15:33:58Z | - |
dc.date.available | 2020-12-29T15:33:58Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29294 | - |
dc.description.abstract | We examine a sample of ∼250 000 `locally brightest galaxies' selected from the Sloan Digital Sky Survey to be central galaxies within their dark matter haloes. We stack the X-ray emission from these haloes, as a function of the stellar mass of the central galaxy, using data from the ROSAT All-Sky Survey. We detect emission across almost our entire sample, including emission which we attribute to hot gas around galaxies spanning a range of 1.2 dex in stellar mass (corresponding to nearly two orders of magnitude in halo mass) down to M_star = 10^10.8 M☉ (M500 ≈ 10^12.6 M☉). Over this range, the X-ray luminosity can be fit by a power law, either of stellar mass or of halo mass. From this, we infer a single unified scaling relation between mass and LX which applies for galaxies, groups, and clusters. This relation has a slope steeper than expected for self-similarity, showing the importance of non-gravitational heating. Assuming this non-gravitational heating is predominately due to AGN feedback, the lack of a break in the relation shows that AGN feedback is tightly self-regulated and fairly gentle, in agreement with the predictions of recent high-resolution simulations. Our relation is consistent with established measurements of the LX-LK relation for elliptical galaxies as well as the LX-M500 relation for optically selected galaxy clusters. However, our LX-M500 relation has a normalization more than a factor of 2 below most previous relations based on X-ray-selected cluster samples. We argue that optical selection offers a less biased view of the LX-M500 relation for mass-selected clusters. | en_US |
dc.language.iso | eng | en_US |
dc.title | Unifying X-ray Scaling Relations from Galaxies to Clusters | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stv437 | en_US |
dc.identifier.scopus | 2-s2.0-84930035343 | en_US |
dc.identifier.isi | 000355342000040 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/449/4/3806/1169927 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 449 | en_US |
dc.relation.issue | 4 | en_US |
dc.relation.firstpage | 3806 | en_US |
dc.relation.lastpage | 3826 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015MNRAS.449.3806A | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0003-2754-9258 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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stv437.pdf | Pdf editoriale | 2.92 MB | Adobe PDF | View/Open |
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