Description
Chair: Grigori Fedorets
-
Synne Sigstad Jørgensen (University of Oslo)27/05/2026, 12:00Poster
The main aim for the next generation of Cosmic Microwave Background (CMB) experiments is the detection of B-mode polarisation; a discovery that will serve as a smoking gun for the theory of inflation. While these experiments are well optimized for observing polarized emission, they must also mitigate the effects of numerous systematics to be able to achieve their target sensitivities. One such...
Go to contribution page -
Talvikki Hovatta (University of Turku)27/05/2026, 12:01Poster
Magnetic fields are thought to play a crucial role in both launching and collimation of blazar jets. 3C273 is our nearest high-power radio-loud quasar, and as such it has been extensively studied since the 1960s. ALMA has opened a new window for studying the jet of 3C273 at millimeter wavelengths. I will present results from a recent study where we have observed both the nucleus and the...
Go to contribution page -
Marianne Vestergaard (Niels Bohr Institute, University of Copenhagen)27/05/2026, 12:02Poster
Despite decades of study of the (variable) nuclear emission from active galactic nuclei, we still do not fully understand the nature of the accretion flow around supermassive black holes and its impact on its immediate surroundings. Objects that vary dramatically on ultra-short timescales of months to years, such as changing-look/changing-state AGN, offer a new means to gain valuable insight...
Go to contribution page -
Liam de Búrca (University of Copenhagen)27/05/2026, 12:03Poster
I present a new spectral decomposition software and framework designed for user-friendly modelling of low-to-intermediate redshift quasar spectra. The Python-based framework is specifically designed for use in the 4MOST AGN survey (S6) to serve as an initial quick and robust spectral modelling tool. The framework is founded on statistically-motivated simplifications, such as fitting different...
Go to contribution page -
Tuomas Kangas (Finnish Centre for Astronomy with ESO, University of Turku)27/05/2026, 12:04Poster
Superluminous supernovae (SLSNe) are extraordinary stellar explosions that dwarf normal supernovae (SNe). Their extreme luminosity and (in most cases) longevity requires an energy budget that far exceeds that of normal SNe and power sources. So-called SLSNe II are H-rich, broad-lined events that show signs of interaction with their circumstellar medium (CSM) despite the lack of strong narrow...
Go to contribution page -
Christina Humina (University of Turku)27/05/2026, 12:05Poster
Type Ic supernovae (SNe) are explosive deaths of massive stars that have lost their
Go to contribution page
hydrogen and helium layers before explosion. In almost all cases this H-rich material is not found near SNe Ic, presumably swept away by the progenitor's strong stellar winds. SN 2017dio is a type Ic SN interacting with hydrogen-rich circumstellar material (CSM), challenging the models of massive-star... -
Buyanbileg Amarsanaa (University of Southern Denmark / SDU-Galaxy)27/05/2026, 12:06Poster
This exploratory study investigates the optimisation of Earth-departure inclination angle for low-energy Earth-Moon transfer in the context of Danish-led Máni mission which is in the ongoing process of Phase A/B1. Using ESA MIDAS-SALTO, the ballistic Earth-Moon flyby leg under the three body dynamics of Sun, Earth and Moon in the ICRF. Initial states are generated via SALTO Lunar-Lambert guess...
Go to contribution page -
Smaragda Vidali27/05/2026, 12:07Poster
Evidence of the CNO cycle can be observed in the atmospheres of K and M giant stars through their surface carbon isotope ratios. For the isotopes standard stellar evolution models predict a decrease in the C12/ C13 ratio to drop from values of about 70 to roughly 20 after first dredge-up. However, observations reveal ratios as low as 5, close to the CNO-cycle equilibrium value, providing...
Go to contribution page -
Gustav Olander27/05/2026, 12:08Poster
Luminous and ultra-luminous infrared galaxies (LIRGs and ULIRGs) play a crucial role in our understanding of galaxy evolution, as they represent phases of intense star formation and rapid supermassive black hole (SMBH) growth. A subset with 21 (38) per cent of the nearby (U)LIRGs shown to contain a highly obscured central galactic engine, a Compact Obscured Nuclei (CON), representing a crucial...
Go to contribution page