Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28399
DC Field | Value | Language |
---|---|---|
dc.contributor.author | MERLUZZI, Paola | en_US |
dc.contributor.author | BUSARELLO, Giovanni | en_US |
dc.contributor.author | Dopita, Michael A. | en_US |
dc.contributor.author | Thomas, Adam D. | en_US |
dc.contributor.author | Haines, Chris P. | en_US |
dc.contributor.author | GRADO, ANIELLO | en_US |
dc.contributor.author | LIMATOLA, LUCA | en_US |
dc.contributor.author | MERCURIO, AMATA | en_US |
dc.date.accessioned | 2020-11-17T17:01:57Z | - |
dc.date.available | 2020-11-17T17:01:57Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28399 | - |
dc.description.abstract | In a low-density region of the Shapley supercluster we identified an interacting galaxy pair at redshift z = 0.04865 in which the Seyfert 2 nucleus of the main galaxy (ShaSS 073) is exciting an extended emission line region (EELR, ∼170 kpc^2) in the disk of the less massive companion (ShaSS 622). New integral-field spectroscopy and the multiband data set, spanning from far-ultraviolet to far-infrared and radio wavelengths, allowed us to obtain a detailed description of the ShaSS 622-073 system. The gas kinematics shows hints of interaction, although the overall velocity field shows a quite regular rotation in both galaxies, thus suggesting that we are observing their first encounter as confirmed by the estimated distance of 21 kpc between the two galaxy centers. The detected ∼ 2-3 kpc active galactic nucleus (AGN) outflow and the geometry of the EELR in ShaSS 622 support the presence of a hollow bicone structure. The status and sources of the ionization across the whole system have been analyzed through photoionization models and a Bayesian approach that prove a clear connection between the AGN and the EELR. The luminosity of the AGN (2.4×10^44 erg/s) is a factor of 20 lower than the power needed to excite the gas in the EELR (4.6 ×10^45 erg/s), indicating a dramatic fading of the AGN in the past 3×10^4 yr. ShaSS 073-622 provides all the ingredients listed in the recipe of a light echo where a highly-ionized region maintains memory of a preceding more energetic phase of a now-faded AGN. This is the first case of a light echo observed between two galaxies. | en_US |
dc.language.iso | eng | en_US |
dc.title | An Interacting Galaxy Pair at the Origin of a Light Echo | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/aa9fff | en_US |
dc.identifier.scopus | 2-s2.0-85040674964 | en_US |
dc.identifier.isi | 000419980900009 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/aa9fff | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 852 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 113 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 8 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | AUS | en_US |
dc.contributor.country | CHL | 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 | 2018ApJ...852..113M | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering | 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.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.orcid | 0000-0003-3966-2397 | - |
crisitem.author.orcid | 0000-0002-4253-7100 | - |
crisitem.author.orcid | 0000-0002-0501-8256 | - |
crisitem.author.orcid | 0000-0001-9261-7849 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Merluzzi_2018_ApJ_852_113.pdf | Pdf editoriale | 6.48 MB | Adobe PDF | View/Open |
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