2-6 September 2024
CJD Bonn Castell
Europe/Berlin timezone
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Session I: Cosmology and Dark matter -- Chair: John McKean

Place

Location: CJD Bonn Castell
Address: Graurheindorfer Str. 149, 53117 Bonn
Date: 2 Sep 09:15 - 10:30

Description

30min Invited Talk 3x 15min Contributed Talk

Timetable | Contribution List

Displaying 4 contributions out of 4
The angular size − redshift relation for radio galaxies was first discussed by Fred Hoyle at the 1957 Paris Symposium on Radio Astronomy. Unlike for optical measurements of angular size, which are systematically influenced by the effects of redshift and sky brightness, radio measurements of component separations are true metric rods. However attempts to observationally test the predicted depend ... More
Presented by Dr. Keneth KELLERMANN on 2/9/2024 at 10:15
The Cold Dark Matter (CDM) model for structure formation is currently the most successful at reproducing many observations, but it remains largely untested in the non-linear sub-galactic regime. A clear prediction of this model is that a significant number of low-mass haloes should populate any galaxy and its line of sight. As most of these objects are expected to be completely dark, strong gravit ... More
Presented by Dr. Simona VEGETTI on 2/9/2024 at 7:15
Anomalous flux ratios between lensed images can provide a key test of the dark matter sub-halo population, and hence the properties of dark matter particles. However, the observed anomalous flux ratios at radio frequencies can also be the result of systematics associated with our lack of knowledge about the source structure, source variability, and propagation effects within the lensing galaxy. Re ... More
Presented by Di WEN on 2/9/2024 at 9:45
Very-long-baseline interferometry (VLBI) observations enable us to study the parsec-scale structure of active galactic nuclei (AGN), and connect changes in the jet brightness distribution, morphology, and opacity to the multiwavelength variability exhibited by these sources. In this talk, I will discuss the connection between the radio and gamma-ray variability in the high-redshift blazar, TXS 150 ... More
Presented by Petra BENKE on 2/9/2024 at 10:00
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