Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/28859
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | BETTONI, Daniela | en_US |
dc.contributor.author | FALOMO, Renato | en_US |
dc.contributor.author | Scarpa, Riccardo | en_US |
dc.contributor.author | Negrello, Mattia | en_US |
dc.contributor.author | Omizzolo, Alessando | en_US |
dc.contributor.author | Corradi, Romano L. M. | en_US |
dc.contributor.author | Reverte, Daniel | en_US |
dc.contributor.author | Vulcani, Benedetta | en_US |
dc.date.accessioned | 2020-12-15T14:30:21Z | - |
dc.date.available | 2020-12-15T14:30:21Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 2041-8205 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28859 | - |
dc.description.abstract | We report the study of an “Einstein Cross” configuration first identified in a set of HST images by Cerny et al. Deep spectroscopic observations obtained at the Spanish 10.4 m Gran Telescopio Canarias telescope, allowed us to demonstrate the lens nature of the system, that consists of a Lyman-break galaxy (LBG), not a quasi-stellar object as is usually the case, at z = 3.03 lensed by a galaxy at z = 0.556. Combining the new spectroscopy with the archival HST data, it turns out that the lens is an elliptical galaxy with M <SUB> V </SUB> = -21.0, effective radius 2.8 kpc, and stellar velocity dispersion σ = 208 ± 39 km s<SUP>-1</SUP>. The source is an LBG with Lyα luminosity ∼L* at that redshift. From the modeling of the system, performed by assuming a singular isothermal ellipsoid (SIE) with external shear, we estimate that the flux source is magnified about 4.5 times, and the velocity dispersion of the lens is {σ }<SUB>SIE</SUB>}={197.9}<SUB>-1.3</SUB><SUP>+2.6</SUP> km s<SUP>-1</SUP>, in good agreement with the value derived spectroscopically. This is the second case known of an Einstein cross of an LBG. | en_US |
dc.language.iso | eng | en_US |
dc.title | A New Einstein Cross Gravitational Lens of a Lyman-break Galaxy | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/2041-8213/ab0aeb | en_US |
dc.identifier.scopus | 2-s2.0-85063483275 | en_US |
dc.identifier.isi | 000460971600002 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/2041-8213/ab0aeb/pdf | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 873 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | L14 | en_US |
dc.relation.numberofpages | 5 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 8 | 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 | THE ASTROPHYSICAL JOURNAL LETTERS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2019ApJ...873L..14B | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | sì | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 2041-8205 | - |
crisitem.journal.ance | E196528 | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.orcid | 0000-0002-4158-6496 | - |
crisitem.author.orcid | 0000-0003-0980-1499 | - |
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