Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24048
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Manni, L. | en_US |
dc.contributor.author | Nucita, A.A. | en_US |
dc.contributor.author | De Paolis, F. | en_US |
dc.contributor.author | TESTA, Vincenzo | en_US |
dc.contributor.author | Ingrosso, G. | en_US |
dc.date.accessioned | 2020-04-15T14:15:29Z | - |
dc.date.available | 2020-04-15T14:15:29Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24048 | - |
dc.description.abstract | We present the results of the analysis of deep archival \sat\ observations towards the dwarf spheroidal galaxies Draco, Leo I, Ursa Major II and Ursa Minor in the Milky Way neighbourhood. The X-ray source population is characterized and cross-correlated with available databases with the aim to infer their nature. We also investigate if intermediate-mass black holes are hosted in the center of these galaxies. In the case of Draco, we detect 96 high-energy sources, two of them being possibly local stars, while no evidence for any X-ray emitting central compact object is found. Towards the Leo I and UMa II field of view we reveal 116 and 49 X-ray sources, respectively. None of them correlates with the putative central black holes and only one is likely associated with a UMa II local source. The study of the UMi dwarf galaxy shows 54 high-energy sources and a possible association {with a source at the dSph center}. We put an upper limit to the central compact object luminosity of 4.02$\times$10$^{33}$ erg/s. Furthermore, via the correlation with a radio source near the galactic center, we get that the putative black hole should have a mass of $\left(2.76^{+32.00}_{-2.54}\right)\times10^6 M_{\odot}$ and be radiatively inefficient. This confirms a previous result obtained by using Chandra data alone. | en_US |
dc.language.iso | eng | en_US |
dc.title | A XMM-Newton observation of a sample of four close dwarf spheroidal galaxies | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stv1009 | en_US |
dc.identifier.scopus | 2-s2.0-84942108894 | en_US |
dc.identifier.isi | 000360833700036 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/451/3/2735/1179084 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 451 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 2735 | en_US |
dc.relation.lastpage | 2749 | en_US |
dc.relation.numberofpages | 15 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 5 | en_US |
dc.description.international | no | en_US |
dc.contributor.country | ITA | 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 | 2015MNRAS.451.2735M | en_US |
dc.relation.ercsector | Scienze Fisiche Settori ERC (ERC) di riferimento::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 (allegherò 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.orcid | 0000-0003-1033-1340 | - |
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 | |
---|---|---|---|---|
stv1009.pdf | PDF editoriale | 1.37 MB | Adobe PDF | View/Open |
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