Konkoly Extragalactic Workshop 2026

Session

Talks

17 Mar 2026, 11:00

Detre Hall (Konkoly Observatory)

13. Probing the origin of radio emission in Te-REX objects

Janka Kőmíves (Eötvös Loránd Tudományegyetem)

17/03/2026, 11:00

Milliarcsecond-scale radio observations of active galactic nuclei (AGN) can help us determine the origin of their radio emission. In case of blazars, radio-loud AGN with their jets pointed close to our line of sight, most of the emission comes from the relativistically boosted jet. However, the radio emission of AGN can originate not only from the jets but from the accretion disk corona or...

8. Complex radio jet in a distant blazar across two orders of magnitude in size: multi-frequency VLBI imaging of J1429+5406 at z~3

Dávid Koller (Konkoly Observatory, HUN-REN CSFK / Eötvös Loránd University, Budapest)

17/03/2026, 11:15

Our understanding of jet kinematics in z ≥ 3 quasars is still rather limited, based on a sample of less than about 50 objects. We present very long baseline interferometric (VLBI) observations of the powerful blazar J1429+5406 at z=3.015, observed at six frequencies (0.4–15 GHz) between 1994 and 2024. While outer jet components at ∼20–40 milliarcsecond (mas) show no apparent motion, three...

19. Advanced morphological analysis of spiral galaxies in the LSST era

Balázs Pinczel (Eötvös Loránd University)

17/03/2026, 11:30

The morphological analysis of galaxies provides important insights into the physical processes that shape their formation and evolution. Modern sky surveys, such as the Legacy Survey of Space and Time (LSST) conducted by the Vera C. Rubin Observatory, enable the study of galaxy morphology across large samples, further increasing the need for efficient automated analysis methods.

This...

14. Probing the primordial Universe with large scale structure surveys

Dr Jose Bermejo (Konkoly Observatory)

17/03/2026, 11:45

We live in the era of big data cosmology, as many large scale structure surveys like DESI, Euclid and LSST are happening this decade. These datasets are mapping the Universe with unprecedented sensitivity and depth, and will allow us to better understand the nature of dark energy. However, they are also useful to trace the physics of the primordial Universe, and in particular, we can determine...

15. High-Velocity Features in Type Ia Supernovae—A puzzle still waiting to be solved after 26 years

Zsófia Bora

17/03/2026, 12:00

High-velocity (25-30000 km/s) lines (HVFs) of Ca II were first discovered in the spectrum of SN1994D in 1999, and since then, they have been proven to be ubiquitous. Despite this, their exact origin remains unclear to this day. They appear to form in a higher-velocity layer above the photosphere (10-15000 km/s) and show varying strengths and velocity evolutions from object to object.

We...

16. Type Ia Supernovae in the Coma Cluster

Ágoston Horti-Dávid (HUN-REN Csillagászati és Földtudományi Kutatóközpont Konkoly Thege Miklós Csillagászati Intézet)

17/03/2026, 12:15

The Coma galaxy cluster has long been used as a cosmic laboratory. This is no coincidence, as it is one of the closest large galaxy clusters to us after the Virgo cluster. Its distance is large enough for the Hubble flow to dominate, but still close enough to be studied in detail.
In our research, we attempted to determine the Coma galaxy cluster's distance as precisely as possible using Type...