The role of the synchrotron component in the mid-infrared spectrum of M 87

dc.creatorJOSE RAMON VALDES PARRA
dc.creatorMIGUEL Y ROSA MARIA CHAVEZ DAGOSTINO
dc.date2009
dc.date.accessioned2023-07-25T16:23:21Z
dc.date.available2023-07-25T16:23:21Z
dc.identifierhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1283
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7806479
dc.descriptionWe study in detail the mid-infrared (MIR) Spitzer-IRS spectrum of M 87 in the range 5–20 μm. Thanks to the high sensitivity of our Spitzer-IRS spectra we can disentangle the stellar and nuclear components of this active galaxy. To this end, we have properly subtracted from the M 87 spectrum the contribution of the underlying stellar continuum derived from passive Virgo galaxies in our sample. The residual is a clear power law, without any additional termal component, with a zero-point consistent with that obtained by high spatial resolution, ground-based observations. The residual is independent of the adopted passive template. This indicates that the 10 μm silicate emission shown in the spectra of M 87 can be entirely accounted for by the underlying old stellar population, leaving little room for a possible torus contribution. The MIR power law has a slope α ∼0.77–0.82 (Sᵥ ∝ ν exp−α), consistent with optically thin synchrotron emission.
dc.formatapplication/pdf
dc.languageeng
dc.publisherThe Astrophysical Journal
dc.relationcitation:Buson, L., et al., (2009). The role of the synchrotron component in the mid-infrared spectrum of M 87, The Astrophysical Journal. Vol.705(1):356–360
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Inspec/Galaxies: active
dc.subjectinfo:eu-repo/classification/Inspec/Galaxies: elliptical and lenticular, cD
dc.subjectinfo:eu-repo/classification/Inspec/Galaxies: individual (M 87)
dc.subjectinfo:eu-repo/classification/Inspec/Galaxies: jets
dc.subjectinfo:eu-repo/classification/Inspec/Infrared: galaxies
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/21
dc.subjectinfo:eu-repo/classification/cti/21
dc.titleThe role of the synchrotron component in the mid-infrared spectrum of M 87
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/acceptedVersion
dc.audiencestudents
dc.audienceresearchers
dc.audiencegeneralPublic


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