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2. 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, izvirni znanstveni članek Ključne besede: supernova, James Webb Space Telescope, Hubble constant
Objavljeno v RUNG: 31.05.2024; Ogledov: 304; Prenosov: 3
 Celotno besedilo (953,07 KB)
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4. 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, izvirni znanstveni članek Ključne besede: supernova, strong lensing, cosmology, Hubble constant, James Webb Space Telescope
Objavljeno v RUNG: 21.05.2024; Ogledov: 366; Prenosov: 3
Celotno besedilo (1,37 MB)
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5. Hevreka (Supernove tipa 1a)Tanja Petrushevska, Japelj Jure, radijska ali televizijska oddaja, podkast, intervju, novinarska konferenca Opis: 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.
Ključne besede: radio, intervju, supernova
Objavljeno v RUNG: 24.11.2023; Ogledov: 662; Prenosov: 2
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7. 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, izvirni znanstveni članek Ključne besede: astronomy, supernova progenitors
Objavljeno v RUNG: 10.10.2023; Ogledov: 710; Prenosov: 4
Celotno besedilo (3,30 MB)
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9. Contributed talk at the international conference "Cosmology in Miramare" 2023Tanja Petrushevska, 2023, objavljeni povzetek znanstvenega prispevka na konferenci Opis: 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.
Ključne besede: cosmology, supernovae, strong lensing
Objavljeno v RUNG: 07.09.2023; Ogledov: 886; Prenosov: 2
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