A radio-microlensing caustic crossing in B1600+434?

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dc.creatorKoopmans, L. V. E.
dc.creatorde Bruyn, A. G.
dc.creatorWambsganss, J.
dc.creatorFassnacht, C. D.
dc.date2000-04-19
dc.date.accessioned2026-07-07T01:53:14Z
dc.date.available2026-07-07T01:53:14Z
dc.descriptionFirst, we review the current status of the detection of strong `external' variability in the CLASS gravitational B1600+434, focusing on the 1998 VLA 8.5-GHz and 1998/9 WSRT multi-frequency observations. We show that this data can best be explained in terms of radio-microlensing. We then proceed to show some preliminary results from our new multi-frequency VLA monitoring program, in particular the detection of a strong feature (~30%) in the light curve of the lensed image which passes predominantly through the dark-matter halo of the lens galaxy. We tentatively interpret this event, which lasted for several weeks, as a radio-microlensing caustic crossing, i.e. the superluminal motion of a micro-arcsec-scale jet-component in the lensed source over a single caustic in the magnification pattern, that has been created by massive compact objects along the line-of-sight to the lensed image.
dc.description8 pages, 3 figures, to appear in Microlensing 2000: A New Era of Microlensing Astrophysics, eds J.W. Menzies and P.D. Sackett, ASP Conference Series
dc.identifierhttps://arxiv.org/abs/astro-ph/0004285
dc.identifierhttp://arxiv.org/abs/astro-ph/0004285
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/896
dc.subjectAstrophysics
dc.titleA radio-microlensing caustic crossing in B1600+434?
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