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4531 - 4540 / 6021
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4531.
Simulations of Tidal Disruption Events Observations with the LSST
Katja Bricman, 2017, master's thesis

Abstract: The Large Synoptic Survey Telescope (LSST) will produce a multi-colour survey of 25000 square deg of the Southern sky during its 10 years of operations. It will observe over 20 billion galaxies and a similar number of stars, map the Solar System and the Milky Way, and probe dark matter and dark energy. In addition, it will discover thousands of transients every night, including new classes of objects, which have not yet been observed. Due to its large coverage of the sky it will be a perfect tool for the search of rare Tidal Disruption Events (TDEs), which occur when a star passes close by a supermassive black hole and gets disrupted by its tidal force. Afterwards the stellar debris fall back to the black hole, initially at a rate exceeding the Eddington rate, producing an outflow, which releases a flare of energy. When the fallback rate subsides below the Eddington rate, the gas accretes onto the black hole via accretion disk. The LSST simulation framework enables us to simulate observations of different types of objects with the LSST. In this work, we include TDEs in the LSST simulation framework, estimate the number of detected TDEs, and simulate their light curves using a theoretical model, which predicts a t^(-2.6) light curve decline with time in the outflow phase and a t^{-0.4} decline in the disk phase. We also take a closer look at the distribution of the detected TDEs over cosmological redshift and black hole mass.
Keywords: Astronomical observations, Large Synoptic Survey Telescope, Tidal Disruption Events, Black Holes, simulations
Published in RUNG: 17.10.2017; Views: 4234; Downloads: 0
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4532.
Povezovanje hierarhije pridevnikov v samostalniški zvezi in kognicije
Franc Marušič, Petra Mišmaš, 2017, published scientific conference contribution abstract

Keywords: pridevniki, kognicija, samostalniška zveza, kartografija, skladnja
Published in RUNG: 16.10.2017; Views: 3661; Downloads: 0
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4533.
Kaj nam usvajanje nejezikovnih prvin pove o ustroju jezika
Tjaša Popovič, Petra Mišmaš, Rok Žaucer, 2017, published scientific conference contribution abstract

Keywords: usvajanje, pridevniki, koncepti, kognicija, kartografija, skladnja
Published in RUNG: 16.10.2017; Views: 4035; Downloads: 0
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4534.
Ostati sam v času, ki ga ni
Rok Andres, 2017, professional article

Keywords: Vinko Möderndorfer, Tri ženske, Prešernovo gledališče Kranj, dramatika, gledališče
Published in RUNG: 16.10.2017; Views: 4120; Downloads: 0
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4535.
4536.
4537.
Sadovnjak Pod skalco v Kojskem - 150 starih sadnih sort
Zoran Božič, other performed works

Abstract: Predstavitev Goriške kot sadjarske regije in sadovnjaka Pod skalco (genetske banke), s poudarkom na nastanku in značilnostih (visokodebelne podlage, sajenje, gnojenje in škropljenje, najbolj zanimive sorte) ter predstavitev publikacij Stare sadne sorte na Goriškem in Sadje sonca: bogastvo starih briških sadnih sort.
Keywords: travniški sadovnjak, visokodebelni sadovnjak, Goriška Brda, ekološka pridelava, sadjarstvo, agronomija, Avstro-Ogrska, trženje sadja, podlage za cepljenje, gnojenje, škropljenje, drevesnica Omezzolli, drevesnica Dal Monte, Riva del Garda, Brisighella, kmetijstvo
Published in RUNG: 16.10.2017; Views: 4338; Downloads: 213
.pdf Full text (14,85 MB)

4538.
Zgodovina Slovenske akademije znanosti in umetnosti
Željko Oset, unpublished invited conference lecture

Keywords: SAZU, znanost, raziskovalna politika, Inštitut Jožef Stefan, Kemijski inštitut
Published in RUNG: 13.10.2017; Views: 3974; Downloads: 0
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4539.
Search for Physics beyond the Standard Model with the CRESST Experiment
2017, master's thesis

Abstract: In spite of the successes of observational astro- and particle physics and cosmology very much of the universe remains unknown. The Standard Model of particle physics is a theory describing the electromagnetic, weak, and strong nuclear interactions, as well as classifying all the subatomic particles known. But there is overwhelming evidence, that all the known particles, the ordinary (baryonic) matter, the building blocks of planets, stars and ourselves, only make up about 4.9% of the energy content of the universe. The standard model of cosmology (CDM) indicates that the total mass-energy of the universe contains beside the 4.9% ordinary matter two other components: 26.8% dark matter and 68.3% dark energy. The accelerating expansion of the Universe is the result of the effect of the dark energy with its most simple form given by a cosmological constant in Einstein's Equation. Dark matter is an unidentified type of matter that is not accounted for by dark energy and neutrinos and is generally believed to be a non-relativistic, charge neutral and non-baryonic new form of matter. Although dark matter has not been directly observed yet, its existence and properties are inferred from its gravitational effects such as the motions of visible matter, gravitational lensing, its influence on the universe's large-scale structure, and its effects in the cosmic microwave background. Thus the search for Dark Matter is the search for physics beyond the standard model. Although the nature of dark matter is yet unknown, its presence is crucial to understanding the future of the universe. The CRESST experiment is searching for direct evidence in the form of a nuclear recoil induced on a scintillating CaWO4 crystal by a dark matter particle, and is installed and taking data underground at Laboratory Nazionali del Gran Sasso (LNGS) in Italy. While both, dark energy and dark matter, have not been detected directly, a class of dark matter particles that interact only via gravity and the weak force, referred to asWeakly Interacting Massive Particles (WIMPs), has been established as the leading candidate among the dark matter community. For this thesis a special model of dark matter was studied, namely the dark photon. This thesis provides a detailed description of the calculation of the 90% upper limit on the dark photon kinetic mixing based on data from the second phase of the CRESST experiment. The analysis was carried out in a frequentist approach based on the (unbinned) maximum-likelihood method and likelihood ratios. To make a statement about the calculated result and its quality, the used algorithm had to be tested, what was done with Monte Carlo simulations (pseudo data).
Keywords: astro physics, particle physics, cosmology, universe, Standard Model of particle physics, standard model of cosmology, matter, ordinary matter, dark matter, dark energy, accelerating expansion of the Universe, non-baryonic, new form of matter, gravitational lensing, cosmic microwave background, search for physics beyond the standard model, CRESST experiment, direct detection, CaWO4 crystal, underground laboratory, Laboratory Nazionali del Gran Sasso, Weakly Interacting Massive Particles, WIMP, dark photon, 90% upper limit, upper limit, kinetic mixing, frequentist approach, unbinned, maximum likelihood
Published in RUNG: 13.10.2017; Views: 4453; Downloads: 0
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4540.
Predstavitev romana Tomaža Kosmača Preko vode do svobode
Zoran Božič, other performed works

Abstract: V organizaciji Knjižnice Idrija Tomaž Kosmač ob sodelovanju urednika založbe Litera Orlanda Uršiča in pisca spremne besede Zorana Božiča predstavlja svoj najnovejši roman o služenju vojaškega roka v nekdanji JLA.
Keywords: Tomaž kosmač, roman, Preko vode do svobode, služenje vojaškega roka, Jugoslovanska ljudska armada, Kumbor, Črna gora, Orlando Uršič, Litera, Zoran Božič, Beograd, Voždovac, erbejci, Prvi proleterski pešadijski gardijski puk, maršal Tito
Published in RUNG: 12.10.2017; Views: 3817; Downloads: 0
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