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We test asteroseismic radii of Kepler main-sequence and subgiant stars by deriving their parallaxes which are compared with those of the first Gaia data release. We compute radii based on the asteroseismic scaling relations as well as by fitting observed oscillation frequencies to stellar models for a subset of the sample, and test the impact of using effective temperatures from either spectroscop
Icy pebbles may play an important role in planet foation close to the water ice line of protoplanetary discs. There, dust coagulation is more efficient and recondensation of vapour on pebbles may enhance their growth outside the ice line. Previous theoretical studies showed that disruption of icy pebbles due to sublimation increases the growth rate of pebbles inside and outside the ice line, by fr
We present 63 new multi-site radial velocity (RV) measurements of the K1III giant HD 76920, which was recently reported to host the most eccentric planet known to orbit an evolved star. We focused our observational efforts on the time around the predicted periastron passage and achieved near-continuous phase coverage of the corresponding RV peak. By combining our RV measurements from four differen
Studies of the kinematics and chemical compositions of Galactic globular clusters (GCs) enable the reconstruction of the history of star formation, chemical evolution, and mass assembly of the Galaxy. Using the latest data release (DR16) of the SDSS/APOGEE survey, we identify 3090 stars associated with 46 GCs. Using a previously defined kinematic association, we break the sample down into eight se
Asteroid material is detected in white dwarfs (WDs) as atmospheric pollution by metals, in the form of gas/dust discs, or in photometric transits. Within the current paradigm, minor bodies need to be scattered, most likely by planets, into highly eccentric orbits where the material gets disrupted by tidal forces and then accreted on to the star. This can occur through a planet-planet scattering pr
Syfte: Syftet med uppsatsen är att undersöka problem angående redovisningen av statliga stöd och bidrag efter inträdet av covid-19 pandemin. Vårt fokus kommer vara att klargöra de oklarheter som finns gällande hur stöden och bidragen redovisas och när de kan behandlas i redovisning och även huruvida de etablerade normer gällande redovisning har tillämpats. Metod: En kvalitativ fallstudie utförs soPurpose: The purpose with the essay is to study the problems regarding accounting of government grants and assistance since the beginning of the covid-19 pandemic. Our focus will be to bring clarity to the uncertainties regarding how the government grants and assistance shall be accounted for and when they are supposed to be accounted for. Even established norms about accounting have been applied.
Gaia Data Release 3 provides novel flux-calibrated low-resolution spectrophotometry for '220 million sources in the wavelength range 330 nm ≤ λ ≤ 1050 nm (XP spectra). Synthetic photometry directly tied to a flux in physical units can be obtained from these spectra for any passband fully enclosed in this wavelength range. We describe how synthetic photometry can be obtained from XP spectra, illust
EUs anslutning till Europakonventionen har varit föremål för diskussion ända sedan slutet av 1970-talet. På grund av bristande rättslig grund i fördragen, har anslutning dock inte varit möjligt förrän ikraftträdandet av Lissabonfördraget år 2009. Artikel 6(2) FEU föreskriver nu en skyldighet för EU att ansluta sig till konventionen under förutsättning att avtalet om Unionens anslutning avspeglar n
The majority of industrial control systems today are distributed over networks. These systems tend to be complex, and can be difficult both to configure and to analyze; therefore, there is definitely a gain in being able to simulate the behaviour of such a system prior to the actual implementation. This master’s thesis investigates the possibility to simulate the ABB automation system 800xA by ex
När en förvaltningsdomstol beslutar att en upphandling ska rättas eller göras om, får detta konsekvenser för den leverantör som vunnit upphandlingen. Exempel på detta kan vara att den vinnande leverantören ska uteslutas från en ny anbudsutvärdering eller att den vinnande leverantören får vara med i den nya anbudsutvärderingen men med en lägre poäng än tidigare. I uppsatsen studeras det som kallas When an administrative court decides that a public procurement are to be recommenced or corrected, this will have consequences for the supplier that has won the procurement. Examples of this can include that the wining supplier becomes excluded from the new evaluation of tenders or that the wining supplier is allowed to participate in the new evaluation of tenders but with a lower score than befor
Syre är det tredje vanligaste grund ämnet i rymden efter väte och helium. Det förekommernaturligt i tre stabila isotoper; nämligen syre 16,17 och18. Syre 16 är den dominerandesyre isotopen och den huvudsakliga produkten vid kärnbr änning av helium och neon. Dessareaktioner kan ta mellan 3 och 106 år och sker vanligen i det inre omr ådet av massiva stjärnor med exempelvis åtta gånger solens massa. Oxygen is produced inside massive stars and dispersed into the interstellar medium mainly through type II supernovae explosions. This element, which is the third most abundant one in the Universe, plays an important role in tracing the Galactic chemical history and evolution. This study aims at determining oxygen abundances from a sample of 714 F and G dwarf stars located in the solar neighborhoo
I våra celler finns en rad olika organeller som samlar upp molekyler för att sedan utföra olika uppgifter --- likt mikroskopiska varianter av kroppens organ. Klassiska organeller har ett membran som separerar deras inre från cellens miljö. Det finns också organeller som saknar ett omgivande membran. Dessa droppliknande anhopningar av proteiner och nukleinsyror kallas biomolekylära kondensat. De ka
The purpose with this essay is to investigate if there are conditions for freedom of religion in Sudan after the Comprehensive Peace Agreement of 2005. My methodology is to investigate the question of religions liberty in Sudan on the basis of three social levels: state level, religious actors and individual- level. I will use Cole Durham’s comparative Model for analyzing religions liberty and app
