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Chandra High Energy Transmission Gratings Spectra of V3890 Sgr

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dc.contributor.authorOrio, M.
dc.contributor.authorDrake, J. J.
dc.contributor.authorNess, J. U.
dc.contributor.authorBehar, E.
dc.contributor.authorDarnley, M. J
dc.contributor.authorGallagher, J
dc.contributor.authorKuin, N. P. M
dc.contributor.authorLuna, Gerardo Juan Manuel
dc.date.accessioned2025-01-30T15:57:43Z
dc.date.available2025-01-30T15:57:43Z
dc.date.issued2020
dc.description.abstractThe recurrent nova (RN) V3890 Sgr was observed during the seventh day after the onset of its most recent outburst, with the Chandra ACIS-S camera and High Energy Transmission Gratings. A rich emission line spectrum was detected, due to transitions of Fe-L and K-shell ions ranging from neon to iron. The measured absorbed flux is ≈10−10 erg cm−2 s −1 in the 1.4–15 Å range (0.77–8.86 keV). The line profiles are asymmetric, blueshifted, and skewed toward the blue side, as if the ejecta moving toward us are less absorbed than the receding ejecta. The full width at half-maximum of most emission lines is 1000–1200 km s−1 , with some extended blue wings. The spectrum is thermal and consistent with a plasma in collisional ionization equilibrium with column density 1.3 × 1022 cm−2 and at least two components at temperatures of about 1 and 4 keV, possibly a forward and a reverse shock, or regions with differently mixed ejecta and a red giant wind. The spectrum is remarkably similar to the symbiotic RNe V745 Sco and RS Oph, but we cannot distinguish whether the shocks occurred at a distance of a few au from the red giant, or near the giant’s photosphere, in a high-density medium containing only a low mass. The ratios of the flux in lines of aluminum, magnesium, and neon relative to the flux in lines of silicon and iron probably indicate a carbon–oxygen white dwarf.
dc.description.filiationFil: Orio, M.. Istituto Nazionale di Astrofisica; Itali
dc.description.filiationFil: Drake, J. J.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.filiationFil: Ness, J. U.. Agencia Espacial Europea. XMM-Newton Science Operations Centre; España
dc.description.filiationFil: Behar, E.. Technion - Israel Institute of Technology; Israel
dc.description.filiationFil: Darnley, M. J.. University of Liverpool; Reino Unido
dc.description.filiationFil: Gallagher, J.. Istituto Nazionale di Astrofisica; Italia
dc.description.filiationFil: Kuin, N. P. M.. University College London; Estados Unidos
dc.description.filiationFil: Mikolajewska, J.. Polish Academy of Sciences; Argentina
dc.description.filiationFil: Ospina, N.. Istituto Nazionale di Astrofisica; Italia
dc.description.filiationFil: Page, K. L.. University of Leicester; Reino Unido
dc.format.mimetypeapplication/pdf
dc.identifier.citationOrio, M.; Drake, J. J.; Ness, J. U.; Behar, E.; Luna, Gerardo Juan Manuel; et al. (2020) Chandra High Energy Transmission Gratings Spectra of V3890 Sgr. The Astrophysical Journal. 895 (2) pp. 1-14
dc.identifier.doihttp://dx.doi.org/10.3847/1538-4357/ab8c4d
dc.identifier.eissn1538-4357
dc.identifier.urihttps://iopscience.iop.org/article/10.3847/1538-4357/ab8c4d
dc.identifier.urihttps://repositorio.unahur.edu.ar/handle/123456789/527
dc.journal.number2
dc.journal.pagination1-14
dc.journal.titleAstrophysical Journal
dc.journal.volume895
dc.language.isoeng
dc.publisherIOP Publishing
dc.rights.licenseinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.subject.ocde1Ciencias Exactas y Naturales
dc.subject.ocde2Ciencias Físicas
dc.subject.unahurCiencias Básicas y Aplicadas
dc.titleChandra High Energy Transmission Gratings Spectra of V3890 Sgr
dc.typeinfo:eu-repo/semantics/article
dc.type.oaireinfo:eu-repo/semantics/article
dc.type.snrdinfo:ar-repo/semantics/artículo
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
relation.isAuthorOfPublication780246c8-d7fb-43ba-b6f5-1ef1f4e7f242
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