Conveners
Science symposium: "Radio astronomy in the multi-frequency survey era", part II
- Joe Chair: Mohr ()
Science symposium: Science Symposium "Radio astronomy in the multifrequency era", part III
- Jörn Chair: Wilms ()
Shane O'Sullivan
(Hamburg)
05/10/2017, 14:00
I will present a low-frequency, broadband polarisation study of the FRII radio galaxy PKS J0636−2034 (z = 0.0551), using data from the Murchison Widefield Array (MWA) from 70 to 230 MHz. The large, continuous wavelength-squared coverage across the MWA band allows the polarisation and Faraday rotation properties to be determined with a precision approximately two orders of magnitude better than...
Mr.
Gupta Nikhel
(LMU, Munich)
05/10/2017, 14:15
We study the overdensity of point sources in the direction of X-ray-selected galaxy clusters from the Meta-Catalog of X-ray detected Clusters of galaxies (MCXC; $\langle z \rangle = 0.14$) at South Pole Telescope (SPT) and Sydney University Molonglo Sky Survey (SUMSS) frequencies. Flux densities at 95, 150 and 220~GHz are extracted from the 2500~deg$^2$ SPT-SZ survey maps at the locations of...
Dr.
ARITRA BASU
(Max Planck Institute for Radio Astronomy)
05/10/2017, 14:30
I will discuss about the future prospects of the MeerKAT prototype single-dish for performing broadband all sky polarization survey.
Dr.
Ramesh Karuppusamy
(MPIfR)
05/10/2017, 14:45
This talk will be on the MPIfR's efforts to equip the MeerKAT array with receivers and signal processing infrastructure that allows access to the skies in the 1750-3500 MHz range. We are building a 400-beam GPU-based beam-former and a processing cluster to serve as the pulsar and transient hunting machine. The plans on this machine and results from the initial tests with two telescopes will be...
Mr.
Jakob Gelszinnis
(Thüringer Landessternwarte)
05/10/2017, 15:00
The intra-cluster medium accounts for most of the baryon mass in galaxy clusters. However, its dynamical processes, magnetic fields properties, and cosmic ray content are still poorly constrained. Diffuse synchrotron emission in galaxy clusters provides a probe for all of these three components.
Radio relics are synchrotron emission sites found in downstream regions of galaxy cluster...
Dr.
Maurilio Pannella
(LMU München)
05/10/2017, 15:15
I will describe what we've learned in the last decade about star-forming galaxies by using the deepest available HST, Spitzer, Herschel, ALMA and JVLA data and how this is going to be boosted and refined in the coming years thanks to the new upcoming radio continuum facilities like MeerKAT and eventually SKA. I'll focus in particular on the MIGHTEE/LADUMA surveys and the still closed windows...
Prof.
Stefan Wagner
(LSW)
05/10/2017, 16:00
CTA will be the first Cerenkov Facility designed for observatory operation.
This will facilitate multifrequency studies of stationary, variable, and transient sources.
The radio- and VHE gamma-ray sky are dominated by non-thermal sources and joint studies in both bands will provide matching constraints on source properties and radiation mechanisms.
Properties and construction time-scales of...
Dominik Elsaesser
(TU Dortmund)
05/10/2017, 16:15
Driven by a wealth of upcoming missions and observatories across a wide frequency range, astronomy is entering a new era of survey science. As data volumes grow rapidly and data structures become more heterogeneous, progress regarding source populations will still crucially depend from efficient identification of sources across these multi-frequency and multi-messenger datasets. In recent...
Dr.
Torsten Enßlin
(MPI for Astrophysics)
05/10/2017, 16:30
Information field theory (IFT), the information theory for fields, permits the derivation of imaging algorithms, which are optimized for specific measurement situations. I will present the current state of the IFT algorithms RESOLVE and D3PO for radio synthesis and $\gamma$/X-ray imaging, respectively, highlight scientific results obtained with them, and discuss their future evolution.
Prof.
Eduardo Ros
(MPI für Radioastronomie & Univ. de València)
05/10/2017, 16:45
Very-long-baseline interferometry (VLBI) probes compact regions at the hearts of active galactic nuclei at a submilliarcsecond resolution. This technique enables detailed studies to be made of the non-thermal emission in the innermost regions of relativistic plasma jets. The scope of VLBI studies becomes ever broader, reaching higher resolution with longer baselines (space VLBI) and at higher...
Mr.
Thilo Siewert
(Bielefeld University)
05/10/2017, 17:15
Continuum surveys of the radio sky provide a rich resource of
information. Besides the analysis of individual galaxies and other
astrophysical sources, they also allow us to probe cosmological
models. We analyse the data provided by several surveys across radio
frequencies to estimate the Cosmic Radio Dipole in the radio source
counts. This dipole is a deviation from the statistically...
Mr.
Roberto Angioni
(Max-Planck Institut für Radioastronomie)
05/10/2017, 17:30
The γ-ray sky is strongly dominated by blazars, i.e. AGN with relativistic jets oriented closely with our line of sight. Radio galaxies are their misaligned counterparts, and make up about ∼ 1-2% of all AGN observed by Fermi-LAT. At TeV energies, only 5 radio galaxies have currently been detected, but recent work has shown that the CTA has good potential for detecting more of these elusive...
