Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/25048
DC Field | Value | Language |
---|---|---|
dc.contributor.author | FABRIZIO, Michele | en_US |
dc.contributor.author | Bono, G. | en_US |
dc.contributor.author | NONINO, Mario | en_US |
dc.contributor.author | Łokas, E. L. | en_US |
dc.contributor.author | Ferraro, I. | en_US |
dc.contributor.author | Iannicola, G. | en_US |
dc.contributor.author | Buonanno, R. | en_US |
dc.contributor.author | CASSISI, Santi | en_US |
dc.contributor.author | Coppola, G. | en_US |
dc.contributor.author | DALL'ORA, Massimo | en_US |
dc.contributor.author | Gilmozzi, R. | en_US |
dc.contributor.author | MARCONI, Marcella | en_US |
dc.contributor.author | Monelli, M. | en_US |
dc.contributor.author | Romaniello, M. | en_US |
dc.contributor.author | Stetson, P. B. | en_US |
dc.contributor.author | Thévenin, F. | en_US |
dc.contributor.author | Walker, A. R. | en_US |
dc.date.accessioned | 2020-05-21T13:53:39Z | - |
dc.date.available | 2020-05-21T13:53:39Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/25048 | - |
dc.description.abstract | We present new radial velocity (RV) measurements of old (horizontal branch) and intermediate-age (red clump) stellar tracers in the Carina dwarf spheroidal. They are based on more than 2200 low-resolution spectra collected with VIMOS at Very Large Telescope (VLT). The targets are faint (20 ≲ V ≲ 21.5 mag), but the accuracy at the faintest limit is ≤9 km s<SUP>-1</SUP>. These data were complemented with RV measurements either based on spectra collected with FORS2 and FLAMES/GIRAFFE at VLT or available in the literature. We ended up with a sample of 2748 stars and among them, 1389 are candidate Carina stars. We found that the intermediate-age stellar component shows a well-defined rotational pattern around the minor axis. The western and the eastern side of the galaxy differ by +5 and -4 km s<SUP>-1</SUP> when compared with the main RV peak. The old stellar component is characterized by a larger RV dispersion and does not show evidence of the RV pattern. We compared the observed RV distribution with N-body simulations for a former disky dwarf galaxy orbiting a giant Milky Way-like galaxy. We rotated the simulated galaxy by 60° with respect to the major axis, we kept the observer on the orbital plane of the dwarf and extracted a sample of stars similar to the observed one. Observed and predicted {V}<SUB>{rot</SUB>}/σ ratios across the central regions are in remarkable agreement. This evidence indicates that Carina was a disky dwarf galaxy that experienced several strong tidal interactions with the Milky Way. Owing to these interactions, Carina transformed from a disky to a prolate spheroid and the rotational velocity transformed into random motions. | en_US |
dc.language.iso | eng | en_US |
dc.title | The Carina Project. X. On the Kinematics of Old and Intermediate-age Stellar Populations1,2 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/0004-637X/830/2/126 | en_US |
dc.identifier.scopus | 2-s2.0-85053361444 | en_US |
dc.identifier.isi | 000386488200029 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/0004-637X/830/2/126 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 830 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 126 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | FRA | en_US |
dc.contributor.country | DEU | en_US |
dc.contributor.country | ESP | 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 | 2016ApJ...830..126F | 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. Roma | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | O.A. Abruzzo | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.orcid | 0000-0001-5829-111X | - |
crisitem.author.orcid | 0000-0001-6342-9662 | - |
crisitem.author.orcid | 0000-0001-5870-3735 | - |
crisitem.author.orcid | 0000-0001-8209-0449 | - |
crisitem.author.orcid | 0000-0002-1330-2927 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fabrizio_2016_ApJ_830_126.pdf | PDF editoriale | 3.18 MB | Adobe PDF | View/Open |
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