Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/31786
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Daddi, E. | en_US |
dc.contributor.author | Rich, R. M. | en_US |
dc.contributor.author | Valentino, F. | en_US |
dc.contributor.author | Jin, S. | en_US |
dc.contributor.author | DELVECCHIO, IVAN | en_US |
dc.contributor.author | Liu, D. | en_US |
dc.contributor.author | STRAZZULLO, VERONICA | en_US |
dc.contributor.author | Neill, J. | en_US |
dc.contributor.author | Gobat, R. | en_US |
dc.contributor.author | Finoguenov, A. | en_US |
dc.contributor.author | Bournaud, F. | en_US |
dc.contributor.author | Elbaz, D. | en_US |
dc.contributor.author | Kalita, B. S. | en_US |
dc.contributor.author | O'Sullivan, D. | en_US |
dc.contributor.author | Wang, T. | en_US |
dc.date.accessioned | 2022-03-22T14:12:05Z | - |
dc.date.available | 2022-03-22T14:12:05Z | - |
dc.date.issued | 2022 | en_US |
dc.identifier.issn | 2041-8205 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31786 | - |
dc.description.abstract | We present Keck Cosmic Web Imager observations of giant Lyα halos surrounding nine galaxy groups and clusters at 2 < z < 3.3, including five new detections and one upper limit. We find observational evidence for the cold-stream to hot-accretion transition predicted by theory by measuring a decrease in the ratio between the spatially extended Lyα luminosity and the expected baryonic accretion rate (BAR), with increasing elongation above the transition mass (M stream). This implies a modulation of the share of BAR that remains cold, diminishing quasi-linearly (logarithmic slope of 0.97 ± 0.19, 5σ significance) with the halo to M stream mass ratio. The integrated star formation rates (SFRs) and active galactic nucleus (AGN) bolometric luminosities display a potentially consistent decrease, albeit significant only at 2.6σ and 1.3σ, respectively. The higher scatter in these tracers suggests the Lyα emission might be mostly a direct product of cold accretion in these structures rather than indirect, mediated by outflows and photoionization from SFR and AGNs; this is also supported by energetics considerations. Below M stream (cold-stream regime), we measure L Lyα /BAR = 1040.51±0.16 erg s-1 M-1 yr, consistent with predictions, and SFR/BAR = 10-0.54±0.23: on average, 30-10+20 % of the cold streams go into stars. Above M stream (hot-accretion regime), L Lyα is set by M stream (within 0.2 dex scatter in our sample), independent of the halo mass but rising 10-fold from z = 2 to 3. | en_US |
dc.language.iso | eng | en_US |
dc.title | Evidence for Cold-stream to Hot-accretion Transition as Traced by Ly α Emission from Groups and Clusters at 2 < z < 3.3 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/2041-8213/ac531f | en_US |
dc.identifier.scopus | 2-s2.0-85125732660 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/2041-8213/ac531f | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 926 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | L21 | 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 | THE ASTROPHYSICAL JOURNAL LETTERS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2022ApJ...926L..21D | 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 | O.A. Brera | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.orcid | 0000-0001-8706-2252 | - |
crisitem.author.orcid | 0000-0001-7975-2894 | - |
crisitem.journal.journalissn | 2041-8205 | - |
crisitem.journal.ance | E196528 | - |
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