1. Strongly lensed supernovae, the past and the future : lecture at the University of Cambridge, 26. 6. 2024Tanja Petrushevska, 2024, invited lecture at foreign university Abstract: The searches and observations of supernovae (SNe) have been motivated by the fact that they are exceptionally useful for various astrophysical and cosmological applications. Most prominently, Type Ia SNe (SNe Ia) have been used as distance indicators showing that the expansion rate of the Universe is accelerating. The strong gravitational lensing effect provides another powerful tool and occurs when a foreground mass distribution is located along the line of sight to a background source. It can happen so that galaxies and galaxy clusters can act as “gravitational telescopes”, boosting the faint signals from distant SNe and galaxies. Thanks to the magnification boost provided by the gravitational telescope, we are able to probe galaxies and SNe that otherwise would be undetectable. Therefore, the combination of the two tools, SNe and strong lensing, in the single phenomenon of strongly lensed SNe, provides a powerful simultaneous probe of several cosmological and astrophysical phenomena. By measuring the time delays of strongly lensed supernovae and having a high-quality strong lensing model of the galaxy cluster, it is possible to measure the Hubble constant with competitive precision. In this talk, I will present some of the past and recent results that have been possible due to the observations of strongly lensed supernovae and anticipate what we can expect in the future from the upcoming telescope surveys, such as the Vera C. Rubin Observatory and Nancy G. Roman Space Telescope.
Keywords: supernova, strong lensing, Hubble constant
Published in RUNG: 26.06.2024; Views: 226; Downloads: 4
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3. Lensed type Ia supernova “Encore” at z=2 : the first instance of two multiply imaged supernovae in the same host galaxyJustin Pierel, A. B. Newman, S. Dhawan, M. Gu, B. A. Joshi, T. Li, S. Schuldt, L. G. Strolger, S. H. Suyu, Tanja Petrushevska, 2024, original scientific article Keywords: supernova, James Webb Space Telescope, Hubble constant
Published in RUNG: 31.05.2024; Views: 549; Downloads: 3
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5. JWST photometric time-delay and magnification measurements for the triply imaged type ia "SN H0pe" at z=1.78Justin Pierel, B. L. Frye, M. Pascale, Gabriel Bartosch Caminha, W. Chen, S. Dhawan, D. Gilman, M. Grayling, Mateusz Bronikowski, Tanja Petrushevska, 2024, original scientific article Keywords: supernova, strong lensing, cosmology, Hubble constant, James Webb Space Telescope
Published in RUNG: 21.05.2024; Views: 626; Downloads: 3
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6. Effective microorganisms technology applied to sewage sludge and tested in short exposure on Lepidium sativumTanja Buh, Leja Goljat, Darian Rampih, Petra Makorič, Sara Pignattelli, 2024, original scientific article Abstract: Sewage sludge has fertilizer properties and can supply a large amount of necessary nutrients to the crops, because it is full of
organic matter, carbon, nitrogen and other nutrients, but on the other hand, it also contains a lot of toxic compounds, derived
from its origin, such as heavy metals, antibiotics and microplastics. Effective microorganisms are a collection of naturally
occurring beneficial microorganisms that are able to coexist and are commonly used in agriculture and gardening to improve
plant performance and production. In this study, increasing concentrations of sewage sludge alone and added with effective
microorganisms were evaluated in a short exposure on Lepidium sativum L. Parameters that were evaluated are: (i) percentage
inhibition of germination, (ii) root length, (iii) biomass, (iv) soil pH, (v) total organic carbon and nitrogen both at soil and
at root level. Results carried out from our experiment highlighted that effective microorganisms when coupled with sludge
are able to restore biometric parameters by resetting seeds germinability inhibition and improving root elongation more than
50% when compared with plants added only with sludge, restoring the values almost of those to the control plants, as well
as for soil pH values. Total organic carbon and total nitrogen are boosted at soil level almost at 50% when compared with
the same concentrations added only with sludge, while at root level they appear decreased only in plants directly added with
sludge treated with effective microorganisms
Keywords: sewage sludge, effective microorganism, total organic carbon, total nitrogen, germinability, short plants exposure, acute toxicity, biomass, pH
Published in RUNG: 12.04.2024; Views: 659; Downloads: 1
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7. Hevreka (Supernove tipa 1a)Tanja Petrushevska, Japelj Jure, radio or television broadcast, podcast, interview, press conference Abstract: V vesolju tudi poka kot za stavo. Zvezde, ki večino življenja ne počnejo nič drugega kot spreminjajo vodik v helij, si včasih zaželijo pozornosti in eksplodirajo kot supernove. Zvezda kar naenkrat postana svetlejša od celotne galaksije, zato supernove vidimo tudi, ko eksplodirajo daleč, daleč stran. Astronomi vesoljski ognjemet seveda z veseljem opazujejo. Supernove namreč niso zgolj izjemno svetle, ampak igrajo pomembno vlogo pri številnih procesih v vesolju. Kozmične eksplozije so različnih tipov in okusov, verjetno najbolj slavne med njimi pa so supernove tipa 1a. Te nam je približala doktorica Tanja Petrushevska, docentka na Fakulteti za naravoslovje Univerze v Novi Gorici. Pred mikrofon jo je povabil dr. Jure Japelj.
Keywords: radio, intervju, supernova
Published in RUNG: 24.11.2023; Views: 806; Downloads: 2
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9. A population of Type Ibc supernovae with massive progenitors : broad lightcurves not uncommon in (i)PTFE. Karamehmetoglu, Jesper Sollerman, F. Taddia, C. Barbarino, U. Feindt, U. C. Fremling, Avishay Gal-Yam, M. M. Kasliwal, Tanja Petrushevska, S. Schulze, 2023, original scientific article Keywords: astronomy, supernova progenitors
Published in RUNG: 10.10.2023; Views: 859; Downloads: 4
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10. STRENGTHENING ENERGY AND CLIMATE LITERACY WITH MICROLEARNING AND OPEN EDUCATIONAL RESOURCESMojca Drevenšek, 2023, master's thesis Abstract: This master’s thesis is motivated by the desire to actively engage Slovenian youth in co-creating our energy and climate future. The background is the growing interest in effective energy transition at the national, EU and global levels, and we specifically focus on the role of education in achieving this goal. The main problem we address is the need for improvement of energy- and climate-related non-formal youth education to increase their interest in the topic, and motivate their engagement in public discussions and the policy-making processes. To tackle this problem, we use the existing En-ROADS energy and climate interactive simulation tool and the accompanying online training series and complement it with new learning materials and learning activities, developed in our educational project. Our approach focuses on open education practices and the co-creation of open educational resources (OER), supported by microlearning via social media (Instagram). We develop a novel approach to address the problem by involving youth in a non-formal open educational process where they are invited to co-create the content and format of learning materials, decide on the technologies used, and affect the implementational process of the key learning activities. The main contributions of the thesis are the developed OERs, which can be adapted, reused or remixed by other stakeholders in the field of energy and climate education, and the recommendations for educators both in the field of energy and climate topics as well as in other fields, related to education for sustainable development. The main methodological finding of the thesis focuses on the importance of flexibility and adaptation of learning materials and activities according to the expressed interests and expectations of young learners. Their feedback needs to be carefully gathered and integrated into the implementation of the project.
Keywords: energy literacy, climate literacy, open education, OER (open educational resources), microlearning, online learning, systems thinking
Published in RUNG: 03.10.2023; Views: 1705; Downloads: 25
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