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dc.contributor.author
Luna, Gerardo Juan Manuel
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dc.contributor.author
Mukai, K.
dc.contributor.author
Orio, M.
dc.contributor.author
Zemko, P.
dc.date.available
2019-07-31T15:01:31Z
dc.date.issued
2018-01
dc.identifier.citation
Luna, Gerardo Juan Manuel; Mukai, K.; Orio, M.; Zemko, P.; Constraining the Accretion Geometry of the Intermediate Polar EX Hya Using NuSTAR, Swift, and Chandra Observations; Institute of Physics Publishing; Astrophysical Journal Letters; 852; 1; 1-2018; 1-5
dc.identifier.issn
2041-8213
dc.identifier.uri
http://hdl.handle.net/11336/80661
dc.description.abstract
In magnetically accreting white dwarfs, the height above the white dwarf surface where the standing shock is formed is intimately related with the accretion rate and the white dwarf mass. However, it is difficult to measure. We obtained new data with NuSTAR and Swift that, together with archival Chandra data, allow us to constrain the height of the shock in the intermediate polar EX Hya. We conclude that the shock has to form at least at a distance of about one white dwarf radius from the surface in order to explain the weak Fe Kα 6.4 keV line, the absence of a reflection hump in the high-energy continuum, and the energy dependence of the white dwarf spin pulsed fraction. Additionally, the NuSTAR data allowed us to measure the true, uncontaminated hard X-ray (12-40 keV) flux, whose measurement was contaminated by the nearby galaxy cluster Abell 3528 in non-imaging X-ray instruments.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Institute of Physics Publishing
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Novae, Cataclysmic Variables
dc.subject
Radiation Mechanisms: General
dc.subject
X-Rays: Individual (Ex Hydrae)
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Constraining the Accretion Geometry of the Intermediate Polar EX Hya Using NuSTAR, Swift, and Chandra Observations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-07-29T14:51:45Z
dc.journal.volume
852
dc.journal.number
1
dc.journal.pagination
1-5
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Luna, Gerardo Juan Manuel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Mukai, K.. National Aeronautics and Space Administration; Estados Unidos
dc.description.fil
Fil: Orio, M.. Università di Padova; Italia
dc.description.fil
Fil: Zemko, P.. Università di Padova; Italia
dc.journal.title
Astrophysical Journal Letters
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://stacks.iop.org/2041-8205/852/i=1/a=L8?key=crossref.6f7286dd97ea88016b777fe4072d2f04
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3847/2041-8213/aaa28f
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