Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
PoGO + polarimetric constraint on the synchrotron jet emission of Cygnus X-1
KTH, Skolan för teknikvetenskap (SCI), Fysik.ORCID-id: 0000-0003-1999-2161
KTH, Skolan för teknikvetenskap (SCI), Fysik.
Visa övriga samt affilieringar
2019 (Engelska)Ingår i: Monthly Notices of the Royal Astronomical Society: Letters, ISSN 1745-3925, Vol. 483, nr 1, s. L138-L143Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We report a polarimetric constraint on the hard X-ray synchrotron jet emission from the Cygnus X-1 black hole binary system. The observational data were obtained using the PoGO+ hard X-ray polarimeter in 2016 July, when Cygnus X-1 was in the hard state. We have previously reported that emission from an extended corona with a low polarization fraction is dominating, and that the polarization angle is perpendicular to the disc surface. In the soft gamma-ray regime, a highly polarized synchrotron jet is reported with INTEGRAL observations. To constrain the polarization fraction and flux of such a jet component in the hard X-ray regime, we now extend analyses through vector calculations in the Stokes QU plane, where the dominant corona emission and the jet component are considered simultaneously. The presence of another emission component with different polarization angle could partly cancel out the net polarization. The 90 per cent upper limit of the polarization fraction for the additional synchrotron jet component is estimated as <10 per cent, <5 per cent, and <5 per cent for polarization angle perpendicular to the disc surface, parallel to the surface, and aligned with the emission reported by INTEGRAL data, respectively. From the 20-180 keV total flux of 2.6 × 10 -8 erg s -1 cm -2, the upper limit of the polarized flux is estimated as < 3 × 10 -9 erg s -1 cm -2.

Ort, förlag, år, upplaga, sidor
Oxford University Press , 2019. Vol. 483, nr 1, s. L138-L143
Nyckelord [en]
accretion, accretion discs, techniques: polarimetric, X-rays: binaries, X-rays: individual (Cygnus X-1)
Nationell ämneskategori
Fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-248187DOI: 10.1093/mnrasl/sly233ISI: 000482178200028Scopus ID: 2-s2.0-85062384117OAI: oai:DiVA.org:kth-248187DiVA, id: diva2:1304579
Anmärkning

QC 20190412

Tillgänglig från: 2019-04-12 Skapad: 2019-04-12 Senast uppdaterad: 2019-09-05Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Personposter BETA

Chauvin, MaximeJackson, MirandaKiss, MózsiMikhalev, VictorPearce, Mark

Sök vidare i DiVA

Av författaren/redaktören
Chauvin, MaximeJackson, MirandaKiss, MózsiMikhalev, VictorPearce, Mark
Av organisationen
FysikPartikel- och astropartikelfysik
Fysik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 5 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf