Artykuł w czasopiśmie
Brak miniatury
Licencja
 

Multiwavelength observations of the Be/X-ray binary IGR J01217-7257 (=SXP 2.16) during outburst

Uproszczony widok
dc.abstract.enWe present simultaneous, multiwavelength observations of the Small Magellanic Cloud Be/XRB IGR J01217-7257 (=SXP 2.16) during outbursts in 2014, 2015 and 2016. We also present the results of the RXTE observations of the Small Magellanic Cloud during which the source was initially discovered with a periodicity of 2.1652 ± 0.0001 s that we associate with the spin period of the neutron star. A systematic temporal analysis of long-term Swift/BAT data reveals a periodic signal of 82.5 ± 0.7 d, in contrast with a similar analysis of long base-line Optical Gravitational Lensing Experiment (OGLE) I-band light curves that reveals 83.67 ± 0.05 d also found in this work. Interpreting the longer X-ray periodicity as indicative of binary motion of the neutron star, we find that outbursts detected by INTEGRAL and Swift between 2014 and 2016 are consistent with type I outbursts seen in Be/XRBs, occurring around periastron. Comparing these outbursts with the OGLE data, we see a clear correlation between outburst occurrence and increasing I-band flux. A periodic analysis of subdivisions of OGLE data reveals three epochs during which short periodicities of ∼1 d are significantly detected which we suggest are non-radial pulsations (NRPs) of the companion star. These seasons immediately precede those exhibiting clear outburst behaviour, supporting the suggested association between the NRPs, decretion disc growth and the onset of type I outbursts.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorBoon, C. M.
dc.contributor.authorBird, A. J.
dc.contributor.authorCoe, M. J.
dc.contributor.authorCorbet, R. H. D.
dc.contributor.authorEvans, P. A.
dc.contributor.authorKennea, J. A.
dc.contributor.authorKrimm, H. A.
dc.contributor.authorLaycock, S. G. T.
dc.contributor.authorUdalski, Andrzej
dc.date.accessioned2024-01-25T13:17:48Z
dc.date.available2024-01-25T13:17:48Z
dc.date.copyright2016-12-02
dc.date.issued2017
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number1
dc.description.versionORIGINAL_AUTHOR
dc.description.volume466
dc.identifier.doi10.1093/MNRAS/STW3169
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/113154
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2017MNRAS.466.1149B
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages1149-1159
dc.rightsOther
dc.sciencecloudnosend
dc.titleMultiwavelength observations of the Be/X-ray binary IGR J01217-7257 (=SXP 2.16) during outburst
dc.typeJournalArticle
dspace.entity.typePublication