Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/30627
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bisogni, Susanna | en_US |
dc.contributor.author | Guido Risaliti | en_US |
dc.contributor.author | Elisabeta Lusso | en_US |
dc.date.accessioned | 2021-02-26T08:59:32Z | - |
dc.date.available | 2021-02-26T08:59:32Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 2296-987X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/30627 | - |
dc.description.abstract | The cosmological model is at present not tested between the redshift of the farthest observed supernovae (z ~ 1.4) and that of the Cosmic Microwave Background (z ~ 1,100). Here we introduce a new method to measure the cosmological parameters: we show that quasars can be used as "standard candles" by employing the non-linear relation between their intrinsic UV and X-ray emission as an absolute distance indicator. We built a sample of ~ 1,900 quasars with available UV and X-ray observations, and produced a Hubble Diagram up to z ~ 5. The analysis of the quasar Hubble Diagram, when used in combination with supernovae, provides robust constraints on the matter and energy content in the cosmos. The application of this method to forthcoming, larger quasar samples, will also provide tight constraints on the dark energy equation of state and its possible evolution with time. | en_US |
dc.language.iso | eng | en_US |
dc.title | A Hubble diagram for quasars | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3389/fspas.2017.00068 | en_US |
dc.identifier.scopus | 2-s2.0-85056798819 | en_US |
dc.identifier.isi | 000428702700001 | en_US |
dc.identifier.url | http://arxiv.org/abs/1712.07515v1 | en_US |
dc.identifier.url | https://www.frontiersin.org/articles/10.3389/fspas.2017.00068/full | en_US |
dc.relation.medium | ELETTRONICO | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 3 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | FRONTIERS IN ASTRONOMY AND SPACE SCIENCES | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2017FrASS...4...68B | 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 | IASF Milano | - |
crisitem.author.orcid | 0000-0003-3746-4565 | - |
crisitem.journal.journalissn | 2296-987X | - |
crisitem.journal.ance | E227194 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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fspas-04-00068_bisogni2018.pdf | PDF editoriale | 1.6 MB | Adobe PDF | View/Open |
Items in DSpace are published in Open Access, unless otherwise indicated.