Large Angle Bending of the Light-Month Jet in Centaurus A
[摘要] AnintercontinentalVLBIobservationofCenAispresented.Wefoundthatthejetexhibitsbendingwithanangleof60°at2light-monthsfromthecore.BecauseofthelargeviewingangleofthejetinCenA,thisbendingshouldbearealbendofthismagnitude,ratherthanaprojectioneffect.Twopossibleinterpretationsofthebendingjet—jetcollisionwithambientmatter,andachangingangleofjetejection—havebeenconsideredandrejected.ThepossibilityisdiscussedthattheobservedbendingofCenAisanapparentbendresultingfromobservingalimb-brightenedjetwithinsufficientresolution,andcomparedwithanumericalsimulationofajet.AnotherimplicationofthebendingjetisdiscussedbasedonasimilaritywithtwootherAGNs,3C273andVirA,inwhichsimilarfeatureshavebeenreportedonthelight-monthsscale.TherelationshipbetweenthemassandthestructurescaleinVirAandCenAisverysimilar.ThisfeatureinCenAsuggeststhatsuchmis-alignmentsonthelight-monthscalearecommonandarerelatedtotheformationmechanismofAGNjets.
[发布日期] [发布机构]
[效力级别] [学科分类] 天文学(综合)
[关键词] "astrophysical jets";"galaxies: individual (Centaurus A)";"galaxies: active" [时效性]
