1. RRI Digital Repository
  2. 04. Astronomy and Astrophysics
  3. Research Papers (A&A)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7751
Full metadata record
DC FieldValueLanguage
dc.contributor.authorPradhan, Pragati-
dc.contributor.authorPaul, Biswajit-
dc.contributor.authorBozzo, E.-
dc.contributor.authorMaitra, Chandreyee-
dc.contributor.authorPaul, B.C.-
dc.date.accessioned2021-04-06T06:11:19Z-
dc.date.available2021-04-06T06:11:19Z-
dc.date.issued2021-03-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2021, Vol.502, p 1163–1190en_US
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966 - (online)-
dc.identifier.urihttp://hdl.handle.net/2289/7751-
dc.descriptionOpen Accessen_US
dc.description.abstractWe present a broad-band spectral analysis of accreting neutron stars using data from XIS and PIN onboard Suzaku. From spectral fits of these sources with a single continuum model including a power law and high energy cut-off, cyclotron lines (where required), we studied the correlation between various spectral parameters. Among 39 sources we studied, 16 are those where the existence of a cyclotron line is known in literature, and 29 need a cut-off energy. Among these 29 sources, 18 have cut-off energy bunched in a range of 3-10 keV while for 11 sources, it spreads over 12-25 keV. This bi-modal behaviour is not based on the specific nature of the systems being a Be XRB or supergiant HMXB, nor on different beaming patterns characterizing their X-ray emission (as inferred from simultaneous study of their pulse profiles). The broad-band coverage of Suzaku also shows that the cut-off energies saturate for higher values of cyclotron line energies - consistent with previous works in literature - for both the groups and the width of the cyclotron line show a weak correlation with the cyclotron line energy. We also find an anticorrelation with luminosity for both spectral index and folding energy, respectively. Unlike previous works, we did not detect any anticorrelation between X-ray luminosity and EW of K α lines. Finally, we show that the EW and flux of the iron K α line are smaller in SFXTs than classical NS-HMXBs. We discuss these findings in terms of different properties of stellar winds and accretion mechanisms.en_US
dc.language.isoenen_US
dc.publisherOxford University Press on behalf of the Royal Astronomical Societyen_US
dc.relation.urihttps://arxiv.org/pdf/2101.01727.pdfen_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2021MNRAS.502.1163P/abstracten_US
dc.relation.urihttps://doi.org/10.1093/mnras/stab024en_US
dc.rights2021 The Author(s)en_US
dc.subjectaccretionen_US
dc.subjectaccretion discsen_US
dc.subjectpulsars: generalen_US
dc.subjectX-rays: binariesen_US
dc.subjectAstrophysics - High Energy Astrophysical Phenomenaen_US
dc.titleComprehensive broadband study of accreting neutron stars with Suzaku: Is there a bi-modality in the X-ray spectrum?en_US
dc.typeArticleen_US
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
2021_MNRAS_Vol.502_P1163-1190.pdfOpen access5.12 MBAdobe PDFView/Open
Show simple item record


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.