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Globular Cluster Binaries and Gravitational Wave Parameter Estimation
This thesis presents valuable contributions to several aspects of the rapidly growing field of gravitational wave astrophysics. The potential sources of gravitational waves in globular clusters are analyzed using sophisticated dynamics simulations involving intermediate mass black holes and including, for the first time, high-order post-Newtonian corrections to the equations of motion. The thesis further demonstrates our ability to accurately measure the parameters of the sources involved in intermediate-mass-ratio inspirals of stellar-mass compact objects into hundred-solar-mass black holes. Lastly, it proposes new techniques for the computationally efficient inference on gravitational waves. On 14 September 2015, the LIGO observatory reported the first direct detection of gravitational waves from the merger of a pair of black holes. For a brief fraction of a second, the power emitted by this merger exceeded the combined output of all stars in the visible universe. This has since been followed by another confirmed detection and a third candidate binary black hole merger. These detections heralded the birth of an exciting new field: gravitational-wave astrophysics.
Mörkret och människan : om svarta hål och vår plats på jorden
Svarta hål: ett av universums största mysterier. En sorts inre kollaps, ett ställe dit materia färdas för att dö, närmast omöjliga att studera. Men ju mer vi lär oss om vad svarta hål egentligen är, desto mer lär vi oss även om vårt eget ursprung samt vår plats på jorden och i universum. Jonas Enander har rest världen över, besökt teleskop och observatorier, intervjuat världsledande rymdforskare och grävt djupt i arkiven för att undersöka hur vår relation till svarta hål har förändrats genom åren. Mörkret och människan är ett slags reseberättelse i tid och rum som lika mycket handlar om forskningen som om människorna bakom den, från Tycho Brahe till dagens Nobelpristagare. Det blir en trollbindande och närmast existentiell betraktelse över ljus och mörker, skapelse och förstörelse, liv och död.
Gravitational Wave Astrophysics with Pulsar Timing Arrays
This Ph.D. thesis from the University of Birmingham UK opens new research avenues in the use of Pulsar Timing Arrays (PTAs) to study populations of super-massive black hole binaries through gravitational-wave observations. Chiara Mingarelli's work has shown for the first time that PTAs can yield information about the non-linear dynamics of the gravitational field. This is possible because PTAs capture, at the same time, radiation from the same source emitted at stages of its binary evolution that are separated by thousands of years. Dr. Mingarelli, who is the recipient of a Marie Curie International Outgoing Fellowship, has also been amongst the pioneers of the technique that will allow us to probe the level of anisotropy of the diffuse gravitational-wave background radiation from the whole population of super-massive black hole binaries in the Universe. Indeed, future observations will provide us with hints about the distribution of galaxies harboring massive black holes and insights into end products of hierarchical mergers of galaxies.
The Yukon Relief Expedition and the Journal of Carl Johan Sakariassen
As cold Weather came on in the autumn of 1897, not all the news from the camps was of gold and glory. Provisions were inadequate to feed the miners in the Yukon District, and surely starvation would set in before spring. Missionary and educator Sheldon Jackson Promised to bring food--even some on the hoof--to save the day. Among those setting out from Norway with live reindeer was Carl Johan Sakariassen: he kept a level head, an unblinking eye, and a careful journal. His vivid, daily account of life on a little-known but remarkable expedition comes in the voice of a candid youth, who reports on his trek across half the world with a dwindling herd of troublesome reindeer and an even more fractious lot of reindeer herders. Editors Rausch and Baldwin have provided thorough historical context and detailed annotation for the journal, making this a useful document for scholars as well as an informative and enjoyable tale for readers with a more casual interest in northern history.
Carl XIV Johan
Napoleonskrigene på kontinentet kom til å få utilsiktede følger for Norden gjennom en av Napoleons hærførere, soldaten og sakførersønnen Jean-Baptiste Bernadotte. I denne boken følger man Bernadottes eventyrlige karriére og livfra posisjonen som general til Sveriges og etter hvert Norges trone. Her fårman et bredt lerret som gir et fascinerende bilde av en ekstraordinær mann, hvis liv sammenfaller med en dramatisk epoke i fransk og nordisk historie. Forfatteren gir en mangefassetert og spennende beretning som går dypt inn i Karl Johans liv og personlighet. Også tilbudt i uke 35. Ib., 1999. (Forhåndsomtale)
