Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7154
Full metadata record
DC FieldValueLanguage
dc.contributor.authorPaliya, Vaidehi S-
dc.contributor.authorParker, M. L-
dc.contributor.authorFabian, A. C-
dc.contributor.authorStalin, C. S-
dc.date.accessioned2020-11-17T14:25:00Z-
dc.date.available2020-11-17T14:25:00Z-
dc.date.issued2016-07-01-
dc.identifier.citationThe Astrophysical Journal, Vol. 825, No. 1, 74en_US
dc.identifier.issn1538-4357-
dc.identifier.urihttp://prints.iiap.res.in/handle/2248/7154-
dc.descriptionRestricted Access © The American Astronomical Society http://dx.doi.org/10.3847/0004-637X/825/1/74en_US
dc.description.abstractWe present a multi-wavelength study of four high redshift blazars, S5 0014+81 (z = 3.37), CGRaBS J0225+1846 (z = 2.69), BZQ J1430+4205 (z = 4.72), and 3FGL J1656.2−3303 (z = 2.40) using quasi-simultaneous data from the Swift, Nuclear Spectroscopic Telescope Array (NuSTAR) and the Fermi-Large Area Telescope (LAT) and also archival XMM-Newton observations. Other than 3FGL J1656.2−3303, none of the sources were known as γ-ray emitters, and our analysis of ~7.5 yr of LAT data reveals the first time detection of statistically significant γ-ray emission from CGRaBS J0225+1846. We generate the broadband spectral energy distributions (SED) of all the objects, centering at the epoch of NuSTAR observations and reproduce them using a one-zone leptonic emission model. The optical−UV emission in all the objects can be explained by radiation from the accretion disk, whereas the X-ray to γ-ray windows of the SEDs are found to be dominated by inverse Compton scattering off the broad line region photons. All of them host black holes that are billions of solar masses. Comparing the accretion disk luminosity and the jet power of these sources with a large sample of blazars, we find them to occupy a high disk luminosity–jet power regime. We also investigate the X-ray spectral properties of the sources in detail with a major focus on studying the causes of soft X-ray deficit, a feature generally seen in high redshift radio-loud quasars. We summarize that this feature could be explained based on the intrinsic curvature in the jet emission rather than being due to the external effects predicted in earlier studies, such as host galaxy and/or warm absorption.en_US
dc.language.isoenen_US
dc.publisherIOP Publishingen_US
dc.subjectGalaxies: activeen_US
dc.subjectGalaxies: jetsen_US
dc.subjectGamma rays: galaxiesen_US
dc.titleBroadband observations of high redshift blazarsen_US
dc.typeArticleen_US
Appears in Collections:IIAP Publications

Files in This Item:
File Description SizeFormat 
Broadband observations of high redshift blazars.pdf7.52 MBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.