Coffee talks
Friday 21/06/2019 @ 11:30, Sala riunioni quarto piano
Aristidis Amvrosiadis (School of Physics and Astronomy, Cardiff University), "The nature of the strongly lensed SMG J091043.0-000322"
We investigate the physical properties of the ISM in the strongly lensed $z_s=1.7830 \pm 0.0002$ galaxy J091043.0$-$000322 (SDP.11) which was discovered in the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS). We use a multi-wavelength suite of observations which were carried out in the near-infrared with the Hubble Space Telescope (HST), in the sub-millimeter with the Atacama Large Millimeter/submillimeter Array (ALMA) and the Submillimeter Array (SMA) and in the millimeter regime with Plateau de Bure Interferometer (PdBI). We build a robust model for the lens from the modelling, in the uv-plane, of the dust continuum emission in ALMA Band 9 which we use to reconstruct the lensed emission from all our observations. Our high resolution observations allow us to probe scales down to $300-700$ pc at the redshift of the source, where the gas emission breaks into several clumps none of which is associated with the more compact dust emission. We use the reconstructed kinematics to investigate the nature of SDP.11, finding evidence that the source is undergoing a major-merging event.