Skip to main content

Research Repository

Advanced Search

Dr Marika Asgari

Image

Marika Asgari

Lecturer in data science and artificial intelligence


KiDS-1000: cosmic shear with enhanced redshift calibration (2022)
Journal Article
Van Den Busch, J. L., Wright, A. H., Hildebrandt, H., Bilicki, M., Asgari, M., Joudaki, S., …Tröster, T. (in press). KiDS-1000: cosmic shear with enhanced redshift calibration. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/202142083

We present a cosmic shear analysis with an improved redshift calibration for the fourth data release of the Kilo-Degree Survey (KiDS-1000) using self-organising maps (SOMs). Compared to the previous analysis of the KiDS-1000 data, we expand the redsh... Read More about KiDS-1000: cosmic shear with enhanced redshift calibration.

Pure-mode correlation functions for cosmic shear and application to KiDS-1000 (2022)
Journal Article
Schneider, P., Asgari, M., Jozani, Y. N., Dvornik, A., Giblin, B., Harnois-Déraps, J., …Wright, A. H. (in press). Pure-mode correlation functions for cosmic shear and application to KiDS-1000. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/202142479

One probe for systematic effects in gravitational lensing surveys is the presence of so-called B modes in the cosmic shear two-point correlation functions, ξ ± (ϑ), since lensing is expected to produce only E-mode shear. Furthermore, there exist ambi... Read More about Pure-mode correlation functions for cosmic shear and application to KiDS-1000.

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies (2022)
Journal Article
Abdalla, E., Abellán, G. F., Aboubrahim, A., Agnello, A., Akarsu, Ö., Akrami, Y., …Zumalacárregui, M. (2022). Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies. Journal of High Energy Astrophysics, 34, 49-211. https://doi.org/10.1016/j.jheap.2022.04.002

The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good description of a wide range of astrophysical and cosmological data. However, there are a few big open questions that make the standard model look like an approximation to a mor... Read More about Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies.

The dark matter halo masses of elliptical galaxies as a function of observationally robust quantities (2022)
Journal Article
Sonnenfeld, A., Tortora, C., Hoekstra, H., Asgari, M., Bilicki, M., Heymans, C., …Wright, A. H. (in press). The dark matter halo masses of elliptical galaxies as a function of observationally robust quantities. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/202142511

Context. The assembly history of the stellar component of a massive elliptical galaxy is closely related to that of its dark matter halo. Measuring how the properties of galaxies correlate with their halo mass can therefore help to understand their e... Read More about The dark matter halo masses of elliptical galaxies as a function of observationally robust quantities.

KiDS-1000 cosmology: Cosmic shear constraints and comparison between two point statistics (2021)
Journal Article
Asgari, M., Lin, C. A., Joachimi, B., Giblin, B., Heymans, C., Hildebrandt, H., …Valentijn, E. (2021). KiDS-1000 cosmology: Cosmic shear constraints and comparison between two point statistics. Astronomy and Astrophysics, 645, https://doi.org/10.1051/0004-6361/202039070

We present cosmological constraints from a cosmic shear analysis of the fourth data release of the Kilo-Degree Survey (KiDS-1000), which doubles the survey area with nine-band optical and near-infrared photometry with respect to previous KiDS analyse... Read More about KiDS-1000 cosmology: Cosmic shear constraints and comparison between two point statistics.

Browse

Advanced Search