Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/26622
Campo DC | Valore | Lingua |
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dc.contributor.author | VANZELLA, Eros | en_US |
dc.contributor.author | CASTELLANO, MARCO | en_US |
dc.contributor.author | MENEGHETTI, MASSIMO | en_US |
dc.contributor.author | MERCURIO, AMATA | en_US |
dc.contributor.author | Caminha, G. B. | en_US |
dc.contributor.author | CUPANI, Guido | en_US |
dc.contributor.author | CALURA, Francesco | en_US |
dc.contributor.author | Christensen, L. | en_US |
dc.contributor.author | MERLIN, Emiliano | en_US |
dc.contributor.author | Rosati, P. | en_US |
dc.contributor.author | Gronke, M. | en_US |
dc.contributor.author | Dijkstra, M. | en_US |
dc.contributor.author | MIGNOLI, Marco | en_US |
dc.contributor.author | GILLI, Roberto | en_US |
dc.contributor.author | De Barros, S. | en_US |
dc.contributor.author | Caputi, K. | en_US |
dc.contributor.author | Grillo, C. | en_US |
dc.contributor.author | Balestra, I. | en_US |
dc.contributor.author | CRISTIANI, Stefano | en_US |
dc.contributor.author | NONINO, Mario | en_US |
dc.contributor.author | GIALLONGO, Emanuele | en_US |
dc.contributor.author | GRAZIAN, Andrea | en_US |
dc.contributor.author | PENTERICCI, Laura | en_US |
dc.contributor.author | FONTANA, Adriano | en_US |
dc.contributor.author | COMASTRI, Andrea | en_US |
dc.contributor.author | Vignali, C. | en_US |
dc.contributor.author | Zamorani, G. | en_US |
dc.contributor.author | Brusa, M. | en_US |
dc.contributor.author | Bergamini, P. | en_US |
dc.contributor.author | TOZZI, Paolo | en_US |
dc.date.accessioned | 2020-07-24T11:17:43Z | - |
dc.date.available | 2020-07-24T11:17:43Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/26622 | - |
dc.description.abstract | We study the spectrophotometric properties of a highly magnified (μ ≃ 40{--}70) pair of stellar systems identified at z = 3.2222 behind the Hubble Frontier Field galaxy cluster MACS J0416. Five multiple images (out of six) have been spectroscopically confirmed by means of VLT/MUSE and VLT/X-Shooter observations. Each image includes two faint ({m}<SUB>{UV</SUB>}≃ 30.6), young (≲ 100 Myr), low-mass (< {10}<SUP>7</SUP> {M}<SUB>☉ </SUB>), low-metallicity (12 + Log(O/H) ≃ 7.7, or 1/10 solar), and compact (30 pc effective radius) stellar systems separated by ≃ 300 pc after correcting for lensing amplification. We measured several rest-frame ultraviolet and optical narrow ({σ }<SUB>v</SUB>≲ 25 km s<SUP>-1</SUP>) high-ionization lines. These features may be the signature of very hot (T> {{50,000}} K) stars within dense stellar clusters, whose dynamical mass is likely dominated by the stellar component. Remarkably, the ultraviolet metal lines are not accompanied by Lyα emission (e.g., C IV/Lyα > 15), despite the fact that the Lyα line flux is expected to be 150 times brighter (inferred from the Hβ flux). A spatially offset, strongly magnified (μ > 50) Lyα emission with a spatial extent ≲ 7.6 kpc<SUP>2</SUP> is instead identified 2 kpc away from the system. The origin of such a faint emission could be the result of fluorescent Lyα induced by a transverse leakage of ionizing radiation emerging from the stellar systems and/or may be associated with an underlying and barely detected object (with {m}<SUB>{UV</SUB>}> 34 de-lensed). This is the first confirmed metal-line emitter at such low-luminosity and redshift without Lyα emission—suggesting that, at least in some cases, a non-uniform covering factor of the neutral gas might hamper the Lyα detection. <P />Based on observations collected at the European Southern Observatory for Astronomical research in the southern hemisphere, under ESO programmes P095.A-0840, P095.A-0653, and P186.A-0798. | en_US |
dc.language.iso | eng | en_US |
dc.title | Magnifying the Early Episodes of Star Formation: Super Star Clusters at Cosmological Distances | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/aa74ae | en_US |
dc.identifier.scopus | 2-s2.0-85021144824 | en_US |
dc.identifier.isi | 000403167700003 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/aa74ae | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 842 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 47 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2017ApJ...842...47V | 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.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 | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0002-5057-135X | - |
crisitem.author.orcid | 0000-0001-9875-8263 | - |
crisitem.author.orcid | 0000-0003-1225-7084 | - |
crisitem.author.orcid | 0000-0001-9261-7849 | - |
crisitem.author.orcid | 0000-0002-6830-9093 | - |
crisitem.author.orcid | 0000-0002-6175-0871 | - |
crisitem.author.orcid | 0000-0001-6870-8900 | - |
crisitem.author.orcid | 0000-0002-9087-2835 | - |
crisitem.author.orcid | 0000-0001-8121-6177 | - |
crisitem.author.orcid | 0000-0002-2115-5234 | - |
crisitem.author.orcid | 0000-0001-6342-9662 | - |
crisitem.author.orcid | 0000-0003-0734-1273 | - |
crisitem.author.orcid | 0000-0002-5688-0663 | - |
crisitem.author.orcid | 0000-0001-8940-6768 | - |
crisitem.author.orcid | 0000-0003-3820-2823 | - |
crisitem.author.orcid | 0000-0003-3451-9970 | - |
crisitem.author.orcid | 0000-0003-3096-9966 | - |
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