Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28441
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Di Teodoro, E. M. | en_US |
dc.contributor.author | Grillo, C. | en_US |
dc.contributor.author | Fraternali, F. | en_US |
dc.contributor.author | Gobat, R. | en_US |
dc.contributor.author | Karman, W. | en_US |
dc.contributor.author | MERCURIO, AMATA | en_US |
dc.contributor.author | Rosati, P. | en_US |
dc.contributor.author | Balestra, I. | en_US |
dc.contributor.author | Caminha, G. B. | en_US |
dc.contributor.author | Caputi, K. I. | en_US |
dc.contributor.author | Lombardi, M. | en_US |
dc.contributor.author | Suyu, S. H. | en_US |
dc.contributor.author | Treu, T. | en_US |
dc.contributor.author | VANZELLA, Eros | en_US |
dc.date.accessioned | 2020-11-19T10:57:06Z | - |
dc.date.available | 2020-11-19T10:57:06Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28441 | - |
dc.description.abstract | We use Multi Unit Spectroscopic Explorer (MUSE) observations of the galaxy cluster MACS J1149.5+2223 to explore the kinematics of the grand-design spiral galaxy (Sp1149) hosting the supernova `Refsdal'. Sp1149 lies at z ≃ 1.49, has a stellar mass M<SUB>*</SUB> ≃ 5 × 10<SUP>9</SUP> M<SUB>☉</SUB>, has a star formation rate (SFR) ∼eq 1-6 M_{☉} yr^{-1}, and represents a likely progenitor of a Milky Way-like galaxy. All the four multiple images of Sp1149 in our data show strong [O II}-line emissions pointing to a clear rotation pattern. We take advantage of the gravitational lensing magnification effect (≃4×) on the [O II} emission of the least distorted image to fit three-dimensional kinematic models to the MUSE data cube and derive the rotation curve and the velocity dispersion profile of Sp1149. We find that the rotation curve steeply rises, peaks at R ≃ 1 kpc, and then (initially) declines and flattens to an average {V_flat}= 128^{+29}_{-19} km s<SUP>-1</SUP>. The shape of the rotation curve is well determined, but the actual value of V<SUB>flat</SUB> is quite uncertain because of the nearly face-on configuration of the galaxy. The intrinsic velocity dispersion due to gas turbulence is almost constant across the entire disc with an average of 27 ± 5 km s<SUP>-1</SUP>. This value is consistent with z = 0 measurements in the ionized gas component and a factor of 2-4 lower than other estimates in different galaxies at similar redshifts. The average stellar-to-total mass fraction is of the order of one-fifth. Our kinematic analysis returns the picture of a regular star-forming, mildly turbulent, rotation-dominated (V/σ ≃ 5) spiral galaxy in a 4-Gyr-old Universe. | en_US |
dc.language.iso | eng | en_US |
dc.title | Kinematics of the SN Refsdal host revealed by MUSE: a regularly rotating spiral galaxy at z ≃ 1.5 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/sty175 | en_US |
dc.identifier.scopus | 2-s2.0-85043507532 | en_US |
dc.identifier.isi | 000429276700064 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article-abstract/476/1/804/4828360 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 476 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 804 | 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 | 2018MNRAS.476..804D | 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::PE9_6 Stars and stellar systems | 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. Capodimonte | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0001-9261-7849 | - |
crisitem.author.orcid | 0000-0002-5057-135X | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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1801.06546.pdf | 1.2 MB | Adobe PDF | View/Open | |
sty175.pdf | PDF editoriale | 2.1 MB | Adobe PDF | View/Open |
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