A Multi-Wavelength Study of Multiple Spectral Component Jets in AGN: Testing the IC/CMB Model for the Large-Scale-Jet X-ray Emission

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dc.contributor.authorBreiding, Peter
dc.contributor.authorMeyer, Eileen T.
dc.contributor.authorGeorganopoulos, Markos
dc.contributor.authorReddy, Karthik
dc.contributor.authorKollmann, Kassidy
dc.contributor.authorRoychowdhury, Agniva
dc.date.accessioned2022-11-11T15:05:25Z
dc.date.available2022-11-11T15:05:25Z
dc.date.issued2022-10-24
dc.description.abstractOver ∼150 resolved, kpc-scale X-ray jets hosted by active galactic nuclei have been discovered with the Chandra X-ray Observatory. A significant fraction of these jets have an X-ray spectrum either too high in flux or too hard to be consistent with the high-energy extension of the radio-to-optical synchrotron spectrum, a subtype we identify as Multiple Spectral Component (MSC) X-ray jets. A leading hypothesis for the origin of the X-rays is the inverse-Compton scattering of the cosmic microwave background by the same electron population producing the radio-to-optical synchrotron spectrum (known as the IC/CMB model). In this work, we test the IC/CMB model in 45 extragalactic X-ray jets using observations from the Fermi Large Area Telescope to look for the expected high level of gamma-ray emission, utilizing observations from the Atacama Large Millimeter/submillimeter Array (ALMA) and the Hubble Space Telescope (HST) when possible to best constrain the predicted gamma-ray flux. Including this and previous works, we now find the IC/CMB model to be ruled out in a total of 24/45 MSC X-ray jets due to its overprediction for the observed MeV-to-GeV gamma-ray flux. We present additional evidence against the IC/CMB model, including the relative X-ray-to-radio relativistic beaming in these sources, and the general mismatch between radio and X-ray spectral indexes. Finally, we present upper limits on the large-scale bulk-flow Lorentz factors for all jets based on the Fermi upper limits, which suggest that these jets are at most mildly relativistic.en_US
dc.description.urihttps://arxiv.org/abs/2210.13104en_US
dc.format.extent30 pagesen_US
dc.genrejournal articlesen_US
dc.genrepreprintsen_US
dc.identifierdoi:10.13016/m2gvgw-m6ow
dc.identifier.urihttps://doi.org/10.48550/arXiv.2210.13104
dc.identifier.urihttp://hdl.handle.net/11603/26305
dc.language.isoen_USen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Student Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.en_US
dc.titleA Multi-Wavelength Study of Multiple Spectral Component Jets in AGN: Testing the IC/CMB Model for the Large-Scale-Jet X-ray Emissionen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-7676-9962en_US
dcterms.creatorhttps://orcid.org/0000-0003-4004-2451en_US
dcterms.creatorhttps://orcid.org/0000-0003-1101-8436en_US

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