Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/28773
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | ANNIBALI, FRANCESCA | en_US |
dc.contributor.author | BELLAZZINI, Michele | en_US |
dc.contributor.author | Correnti, M. | en_US |
dc.contributor.author | Sacchi, E. | en_US |
dc.contributor.author | TOSI, Monica | en_US |
dc.contributor.author | Cignoni, M. | en_US |
dc.contributor.author | Aloisi, A. | en_US |
dc.contributor.author | Calzetti, D. | en_US |
dc.contributor.author | Ciotti, L. | en_US |
dc.contributor.author | CUSANO, FELICE | en_US |
dc.contributor.author | Lee, J. | en_US |
dc.contributor.author | Nipoti, C. | en_US |
dc.date.accessioned | 2020-12-10T10:49:19Z | - |
dc.date.available | 2020-12-10T10:49:19Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28773 | - |
dc.description.abstract | We present new Hubble Space Telescope imaging of a stream-like system associated with the dwarf galaxy DDO 68, located in the Lynx-Cancer void at a distance of D ∼ 12.65 Mpc from us. The stream, previously identified in deep Large Binocular Telescope images as a diffuse low surface brightness structure, is resolved into individual stars in the F606W (broad V) and F814W (∼I) images acquired with the Wide Field Camera 3. The resulting V, I color-magnitude diagram (CMD) of the resolved stars is dominated by old (age ≳ 1-2 Gyr) red giant branch (RGB) stars. From the observed RGB tip, we conclude that the stream is at the same distance as DDO 68, confirming the physical association with it. A synthetic CMD analysis indicates that the large majority of the star formation activity in the stream occurred at epochs earlier than ∼1 Gyr ago, and that the star formation at epochs more recent than ∼500 Myr ago is compatible with zero. The total stellar mass of the stream is ∼10<SUP>6</SUP> M <SUB>☉</SUB>, about 1/100 of that of DDO 68. This is a striking example of hierarchical merging in action at the dwarf galaxy scales. | en_US |
dc.language.iso | eng | en_US |
dc.title | HST Resolves Stars in a Tiny Body Falling on the Dwarf Galaxy DDO 68 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/ab3409 | en_US |
dc.identifier.scopus | 2-s2.0-85073189772 | en_US |
dc.identifier.isi | 000486374000019 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/ab3409 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 883 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 19 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 12 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | 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 | 2019ApJ...883...19A | 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 | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0003-3758-4516 | - |
crisitem.author.orcid | 0000-0001-8200-810X | - |
crisitem.author.orcid | 0000-0002-0986-4759 | - |
crisitem.author.orcid | 0000-0003-2910-6565 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
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Annibali_2019_ApJ_883_19.pdf | Pdf editoriale | 3.28 MB | Adobe PDF | Visualizza/apri |
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