6533b85afe1ef96bd12b8e6a
RESEARCH PRODUCT
A sensitive study of the peculiar jet structure HST-1 in M87
José-maría MartíChristian M. FrommKazuhiro HadaKazuhiro HadaCarolina CasadioJosé L. GómezManel PeruchoMarcello GirolettiGabriele Giovanninisubject
High Energy Astrophysical Phenomena (astro-ph.HE)PhysicsJet (fluid)Cosmology and Nongalactic Astrophysics (astro-ph.CO)Superluminal motionPhysicsQC1-999Astrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsConical surfaceAstrophysicsShock (mechanics)Astrophysics - High Energy Astrophysical PhenomenaMhd instabilityAstrophysics::Galaxy AstrophysicsAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
To obtain a better understanding of the location and mechanisms for the production of the gamma-ray emission in jets of AGN we present a detailed study of the HST-1 structure, 0.8 arcsec downstream the jet of M87, previously identified as a possible candidate for TeV emission. HST-1 shows a very peculiar structure with superluminal as well as possible stationary sub-components, and appears to be located in the transition from a parabolic to a conical jet shape, presumably leading to the formation of a recollimation shock. This scenario is supported by our new RHD simulations in which the interaction of a moving component with a recollimation shock leads to the appearance of a new superluminal component. To discern whether HST-1 is produced by a recollimation shock or some other MHD instability, we present new polarimetric 2.2 and 5 GHz VLBA, as well as 15, 22 and 43 GHz JVLA observations obtained between November 2012 and March 2013.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-10-23 | EPJ Web of Conferences |