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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/32047
DC FieldValueLanguage
dc.contributor.authorBulla, M.en_US
dc.contributor.authorKyutoku, K.en_US
dc.contributor.authorTanaka, M.en_US
dc.contributor.authorCOVINO, Stefanoen_US
dc.contributor.authorBruten, J. R.en_US
dc.contributor.authorMatsumoto, T.en_US
dc.contributor.authorMaund, J. R.en_US
dc.contributor.authorTESTA, Vincenzoen_US
dc.contributor.authorWiersema, K.en_US
dc.date.accessioned2022-03-29T13:48:16Z-
dc.date.available2022-03-29T13:48:16Z-
dc.date.issued2021en_US
dc.identifier.issn0035-8711en_US
dc.identifier.urihttp://hdl.handle.net/20.500.12386/32047-
dc.description.abstractWe predict linear polarization for a radioactively-powered kilonova following the merger of a black hole and a neutron star. Specifically, we perform 3-D Monte Carlo radiative transfer simulations for two different models, both featuring a lanthanide-rich dynamical ejecta component from numerical-relativity simulations while only one including an additional lanthanide-free disk wind component. We calculate polarization spectra for nine different orientations at 1.5, 2.5 and 3.5 d after the merger and in the $0.1-2\,\mu$m wavelength range. We find that both models are polarized at a detectable level 1.5 d after the merger while show negligible levels thereafter. The polarization spectra of the two models are significantly different. The model lacking a disk wind shows no polarization in the optical, while a signal increasing at longer wavelengths and reaching $\sim1\%-6\%$ at $2\,\mu$m depending on the orientation. The model with a disk-wind component, instead, features a characteristic "double-peak" polarization spectrum with one peak in the optical and the other in the infrared. Polarimetric observations of future events will shed light on the debated neutron richness of the disk-wind component. The detection of optical polarization would unambiguously reveal the presence of a lanthanide-free disk-wind component, while polarization increasing from zero in the optical to a peak in the infrared would suggest a lanthanide-rich composition for the whole ejecta. Future polarimetric campaigns should prioritize observations in the first $\sim48$ hours and in the $0.5-2\,\mu$m range, where polarization is strongest, but also explore shorter wavelengths/later times where no signal is expected from the kilonova and the interstellar polarization can be safely estimated.en_US
dc.language.isoengen_US
dc.titlePolarized kilonovae from black hole-neutron star mergersen_US
dc.typeArticle-
dc.identifier.doi10.1093/mnras/staa3796en_US
dc.identifier.scopus2-s2.0-85100248606en_US
dc.identifier.urlhttp://arxiv.org/abs/2009.07279v2en_US
dc.identifier.urlhttps://academic.oup.com/mnras/article/501/2/1891/6030051?login=trueen_US
dc.relation.mediumSTAMPAen_US
dc.relation.volume501en_US
dc.relation.issue2en_US
dc.relation.firstpage1891en_US
dc.relation.lastpage1899en_US
dc.relation.numberofpages9en_US
dc.type.refereeREF_1en_US
dc.description.numberofauthors9en_US
dc.description.internationalsìen_US
dc.contributor.countryITAen_US
dc.contributor.countryGBRen_US
dc.contributor.countryJPNen_US
dc.contributor.countrySWEen_US
dc.relation.scientificsectorFIS/05 - ASTRONOMIA E ASTROFISICAen_US
dc.relation.journalMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETYen_US
dc.type.miur262 Articolo in rivista-
dc.identifier.adsbibcode2021MNRAS.501.1891Ben_US
dc.relation.ercsectorERC 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_11 Relativistic astrophysicsen_US
dc.description.apcnoen_US
dc.description.oa1 – prodotto con file in versione Open Access (allegare il file al passo  5-Carica)en_US
item.grantfulltextopen-
item.fulltextWith Fulltext-
item.openairetypeArticle-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
crisitem.journal.journalissn0035-8711-
crisitem.journal.anceE112946-
crisitem.author.deptO.A. Brera-
crisitem.author.deptO.A. Roma-
crisitem.author.orcid0000-0001-9078-5507-
crisitem.author.orcid0000-0003-1033-1340-
Appears in Collections:1.01 Articoli in rivista
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