The X-Ray Pulsar XTE J1858+034 Observed with NuSTAR and Fermi/GBM: Spectral and Timing Characterization plus a Cyclotron Line

Tietueen suppeat tiedot
dc.contributor.authorMalacaria C
dc.contributor.authorKretschmar P
dc.contributor.authorMadsen KK
dc.contributor.authorWilson-Hodge CA
dc.contributor.authorColey Joel B.
dc.contributor.authorJenke P
dc.contributor.authorLutovinov Alexander A.
dc.contributor.authorPottschmidt K
dc.contributor.authorTsygankov Sergey S.
dc.contributor.authorWilms J
dc.contributor.organizationfi=Tuorlan observatorio|en=Tuorla Observatory|
dc.contributor.organization-code1.2.246.10.2458963.20.90670098848
dc.converis.publication-id53689473
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/53689473
dc.date.accessioned2025-08-27T22:37:56Z
dc.date.available2025-08-27T22:37:56Z
dc.description.abstractAccreting X-ray pulsars (XRPs) undergo luminous X-ray outbursts during which the spectral and timing behavior of the neutron star can be studied in detail. We analyze a NuSTAR observation of the XRP XTE J1858+034 during its outburst in 2019. The spectrum is fit with a phenomenological, a semiempirical, and a physical spectral model. A candidate cyclotron line is found at 48 keV, implying a magnetic field of 5.4 <b>×</b> 10<sup>12</sup> G at the site of emission. This is also supported by the physical best-fit model. We propose an orbital period of about 81 days based on the visual inspection of the X-ray outburst recurrence time. Based on Fermi/GBM data, the standard disk accretion-torque theory allowed us to infer a distance of 10.9 ± 1.0 kpc. Pulse profiles are single-peaked and show a pulsed fraction that is strongly energy-dependent at least up to 40 keV.
dc.identifier.eissn1538-4357
dc.identifier.jour-issn0004-637X
dc.identifier.olddbid202501
dc.identifier.oldhandle10024/185528
dc.identifier.urihttps://www.utupub.fi/handle/11111/47084
dc.identifier.urlhttps://iopscience.iop.org/article/10.3847/1538-4357/abddbc
dc.identifier.urnURN:NBN:fi-fe2021042827334
dc.language.isoen
dc.okm.affiliatedauthorTsygankov, Sergey
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherIOP PUBLISHING LTD
dc.publisher.countryUnited Statesen_GB
dc.publisher.countryYhdysvallat (USA)fi_FI
dc.publisher.country-codeUS
dc.relation.articlenumberARTN 153
dc.relation.doi10.3847/1538-4357/abddbc
dc.relation.ispartofjournalAstrophysical Journal
dc.relation.issue2
dc.relation.volume909
dc.source.identifierhttps://www.utupub.fi/handle/10024/185528
dc.titleThe X-Ray Pulsar XTE J1858+034 Observed with NuSTAR and Fermi/GBM: Spectral and Timing Characterization plus a Cyclotron Line
dc.year.issued2021

Tiedostot

Näytetään 1 - 1 / 1
Name:
2101.07020.pdf
Size:
913.02 KB
Format:
Adobe Portable Document Format
Description:
Final draft
Lataa

Kokoelmat

Rinnakkaistallenteet