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The Remarkable Spin-down and Ultrafast Outflows of the Highly Pulsed Supersoft Source of Nova Herculis 2021

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dc.contributor.authorDrake, Jeremy
dc.contributor.authorNess, Jan Uwe
dc.contributor.authorPage, Kim L.
dc.contributor.authorBeardmore, Andrew P.
dc.contributor.authorOrio, Marina
dc.contributor.authorOsborne, Julian P.
dc.contributor.authorMróz, Przemek
dc.contributor.authorStarrfield, Sumner
dc.contributor.authorBanerjee, Dipankar P. K.
dc.contributor.authorBalman, Solen
dc.contributor.authorDarnley, Matt J
dc.contributor.authorBhargava, Yash
dc.contributor.authorDewangan, Gulab C.
dc.contributor.authorSingh, Kulinder Pal
dc.contributor.authorLuna, Gerardo Juan Manuel
dc.date.accessioned2024-12-02T00:24:57Z
dc.date.available2024-12-02T00:24:57Z
dc.date.issued2021
dc.description.abstractNova Her 2021 (V1674 Her), which erupted on 2021 June 12, reached naked-eye brightness and has been detected from radio to γ-rays. An extremely fast optical decline of 2 magnitudes in 1.2 days and strong Ne lines imply a high-mass white dwarf. The optical pre-outburst detection of a 501.42 s oscillation suggests a magnetic white dwarf. This is the first time that an oscillation of this magnitude has been detected in a classical nova prior to outburst. We report X-ray outburst observations from Swift and Chandra that uniquely show (1) a very strong modulation of supersoft X-rays at a different period from reported optical periods, (2) strong pulse profile variations and the possible presence of period variations of the order of 0.1-0.3 s, and (3) rich grating spectra that vary with modulation phase and show P Cygni-type emission lines with two dominant blueshifted absorption components at ∼3000 and 9000 km s-1 indicating expansion velocities up to 11,000 km s-1. X-ray oscillations most likely arise from inhomogeneous photospheric emission related to the magnetic field. Period differences between reported pre- and post-outburst optical observations, if not due to other period drift mechanisms, suggest a large ejected mass for such a fast nova, in the range 2 10-5-2 10-4 M o˙. A difference between the period found in the Chandra data and a reported contemporaneous post-outburst optical period, as well as the presence of period drifts, could be due to weakly nonrigid photospheric rotation.
dc.description.filiationFil: Drake, Jeremy. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.filiationFil: Ness, Jan Uwe. Agencia Espacial Europea. XMM-Newton Science Operations Centre; España
dc.description.filiationFil: Page, Kim L.. University of Leicester; Reino Unido
dc.description.filiationFil: Luna, Gerardo Juan Manuel. Universidad Nacional de Hurlingham. Instituto de Tecnología e Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina.
dc.description.filiationFil: Beardmore, Andrew P.. University of Leicester; Reino Unido
dc.description.filiationFil: Orio, Marina. Istituto Nazionale di Astrofisica; Italia. University of Wisconsin; Estados Unidos
dc.description.filiationFil: Osborne, Julian P.. University of Leicester; Reino Unido
dc.description.filiationFil: Mróz, Przemek. California Institute of Technology; Estados Unidos. Uniwersytet Warszawski; Polonia.
dc.description.filiationFil: Starrfield, Sumner. Arizona State University; Estados Unidos
dc.description.filiationFil: Banerjee, Dipankar P. K.. Physical Research Laboratory; India
dc.description.filiationFil: Balman, Solen. Istanbul University; Turquía. Kadir Has University; Turquía
dc.description.filiationFil: Darnley, Matt J. Liverpool John Moores University; Reino Unido
dc.description.filiationFil: Bhargava, Yash. Inter-university Centre for Astronomy and Astrophysics; India
dc.description.filiationFil: Dewangan, Gulab C.. Inter-university Centre for Astronomy and Astrophysics; India
dc.description.filiationFil: Singh, Kulinder Pal. Indian Institute of Science Education and Research Moha; India
dc.formatapplication/pdf
dc.identifier.citationDrake, Jeremy; Ness, Jan Uwe; Page, Kim L.; Luna, Gerardo Juan Manuel; Beardmore, Andrew P.; et al.; The Remarkable Spin-down and Ultrafast Outflows of the Highly Pulsed Supersoft Source of Nova Herculis 2021 (2021) Astrophysical Journal Letters; 922 (2) 1-9
dc.identifier.doihttp://dx.doi.org/10.3847/2041-8213/ac34fd
dc.identifier.issn2041-8205
dc.identifier.urihttps://repositorio.unahur.edu.ar/handle/123456789/373
dc.identifier.urihttps://iopscience.iop.org/article/10.3847/2041-8213/ac34fd
dc.journal.number2
dc.journal.pagination1-9
dc.journal.titleAstrophysical Journal Lettersen
dc.journal.volume922
dc.language.isoeng
dc.publisherIOP Publishingen
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.licenseAttribution-NonCommercial-ShareAlike 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.titleThe Remarkable Spin-down and Ultrafast Outflows of the Highly Pulsed Supersoft Source of Nova Herculis 2021
dc.typeinfo: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
relation.isAuthorOfPublication.latestForDiscovery780246c8-d7fb-43ba-b6f5-1ef1f4e7f242
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