4231. Supernovae seen through gravitational telescopesTanja Petrushevska, 2017, druga izvedena dela Opis: Galaxies, and clusters of galaxies, can act as gravitational lenses and magnify the light of objects behind them. The effect enables observations of very distant supernovae, that otherwise would be too faint to be detected by existing telescopes, and allows studies of the frequency and properties of these rare phenomena when the universe was young. Under the right circumstances, multiple images of the lensed supernovae can be observed, and due to the variable nature of the objects, the difference between the arrival times of the images can be measured. Since the images have taken different paths through space before reaching us, the time-differences are sensitive to the expansion rate of the universe. One class of supernovae, Type Ia, are of particular interest to detect. Their well known brightness can be used to determine the magnification, which can be used to understand the lensing systems. I will also report our discovery of the first resolved multiply-imaged gravitationally lensed supernova Type Ia. Ključne besede: lensed supernovae Objavljeno v RUNG: 06.02.2018; Ogledov: 2990; Prenosov: 0 Gradivo ima več datotek! Več... |
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4233. SUMMER SCHOOL AT FYSIKUMTanja Petrushevska, druga izvedena dela Opis: This summer, for two weeks, 120 high school students (out of 750 applicants) had the opportunity to taste how research is done at Stockholm University. The students worked in small groups under the supervision of doctoral students in chemistry, physics, biology and geology. At the Physics department, the two PhD students Tanja Petrushevska and Seméli Papadogiannakis offered a project that involved supernovae and their host galaxies. Ključne besede: summer school for high school students in astrophysics Objavljeno v RUNG: 06.02.2018; Ogledov: 3144; Prenosov: 0 Gradivo ima več datotek! Več... |
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4235. PM SPECIAL – ALLDELES NY UPPTÄCKT INOM SUPERNOVOR OCH GRAVITATIONSLINSNINGTanja Petrushevska, Katarina Bendtz, druga izvedena dela Opis: I dagarna offentliggjordes att astrofysikerna på (iPTF) Intermediate Palomar Transient Factory detekterat en supernova typ 1a som vars ljus just nu böjs av en galax. Fenomenet kallas ”gravitational lensing” och är en effekt av att rumtiden kröks av massiva objekt, som vi diskuterade i Professor Magenta avsnitt om maskhål. Tanja Petrushevska är doktorand på Stockholms universitet och medlem av iPTF. Hon och de andra i iPTF skriver just nu på artikeln om upptäckten som hon berättar mer om i detta PM special! Ključne besede: interview, astrophysics outreach Objavljeno v RUNG: 06.02.2018; Ogledov: 3335; Prenosov: 0 Gradivo ima več datotek! Več... |
4236. Pogovor ob kulturnem prazniku : Opoldanski pogovor v goriškem studiuZoran Božič, radijski ali tv dogodek Opis: Pogovor Klavdije Figelj s profesorjema Zoranom Božičem iz Nove Gorice in Aldom Ruplom iz Gorice. Ključne besede: France Prešeren, Gorica, Nova Gorica, somestje, večkulturnost, skupni kulturni prostor, Evropska prestolnica kulture, čezmejno sodelovanje, odnos do narave, sadovnjak Objavljeno v RUNG: 06.02.2018; Ogledov: 3564; Prenosov: 25 Povezava na celotno besedilo Gradivo ima več datotek! Več... |
4237. Tunable orbital angular momentum in high-harmonic generationDavid Gauthier, Primož Rebernik Ribič, Ganesh Adhikari, A Camper, C Chappuis, LF Dimauro, G Dovillaire, Fabio Frassetto, R Geneaux, Paolo Miotti, Luca Poletto, Barbara Ressel, C. Spezzani, Matija Stupar, T Ruchon, Giovanni De Ninno, 2017, izvirni znanstveni članek Ključne besede: Angular orbital momentum, High harmonic generation Objavljeno v RUNG: 05.02.2018; Ogledov: 4255; Prenosov: 761 Celotno besedilo (843,67 KB) |
4238. New strategy for magnetic gas sensingRoberta Ciprian, Piero Torelli, Angelo Giglia, B Gobaut, Barbara Ressel, Janez Štupar, Matija Stupar, Antonio Caretta, Giovanni De Ninno, Tommaso Pincelli, Barbara Casarin, Ganesh Adhikari, G Sberviglieri, C Baratto, Marco Malvestuto, 2016, izvirni znanstveni članek Ključne besede: hybrid nanostructures, sensor, absorption spectroscopy Objavljeno v RUNG: 05.02.2018; Ogledov: 4092; Prenosov: 0 Gradivo ima več datotek! Več... |
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