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We discuss the recent discovery by Oppenheimer et al. of old, cool white dwarf stars, which may be the first direct detection of Galactic halo dark matter. We argue here that the contribution of more mundane white dwarfs of the stellar halo and thick disc would contribute sufficiently to explain the new high velocity white dwarfs without invoking putative white dwarfs of the dark halo. This by no

The star, HD 207832, has two Jupiter-like planets on orbits with poorly constrained eccentricities. The eccentricities are 0.27 +0.22 -0.10 and 0.13$^{+0.18}_{-0.05}$ respectively. Notably, the two sigma error allows eccentricities up to 0.71 for one of the planets. Due to the large error bars, one aim of this project is to refine them. This is done by simulating the system for different initial e

Some of the shortcomings of the Standard Model of particle physics are the 'unnatural' value of the mass of the Higgs boson and the fact that the model cannot account for the process of baryogenesis - a mechanism which generates the observed asymmetry between matter and anti-matter in the Universe. The former is related to the fundamental scalar nature of the Higgs boson, connected to quad

We review the factorization theorem for the production of a heavy color-neutral final state with a transverse momentum much smaller than its invariant mass in the framework of soft collinear effective field theory (SCET). This phase space region is plagued by large logarithms of widely separated scales, including large logarithms of rapidity ratios, that need to be resummed for sensible results. I

We present a calculation of the finite volume corrections to meson masses and decay constants in three flavour Partially Quenched Chiral Perturbation Theory ( PQChPT) through two-loop order in the chiral expansion for the flavour-charged ( or off-diagonal) pseudoscalar mesons. The analytical results are obtained for three sea quark flavours with one, two or three different masses. We reproduce the

DNA barcodes carry coarse-grained genetic information of DNA sequences taken from a genome. Potential applications include bacteriology, medical diagnosis and taxonomy. However, the current state-of-the-art tools for extracting DNA molecules from cells provide only fragmented pieces of chromosomal DNA. As a consequence, also DNA barcodes are fragmented. This calls for the development of complement

Abstract Title: The Instant need to shop - A qualitative study mapping out retailers perception of instant shopping Course: SMMM40, Service Management: Master’s (Two Years) Thesis (Spring 2022) Authors: Louise Borg & Siri Lindgren Supervisor: Devrim Umut Aslan Date of submission: 2022-05-17 Key words: Instant shopping, Instagram, technology adaptation, retailer-consumer encounter, digital

Popular Abstract in English Disasters continue to affect urban populations and housing infrastructure. They are intensified by extreme weather events caused by climate change. This situation has made the creation of synergies between climate change adaptation (CCA) and disaster risk management (DRM) urgent. Despite their similarities and the recognised need to unite CCA and DRM efforts, the fields

Planet–planet collisions are a common outcome of instability in systems of transiting planets close to the star, as well as occurring during in-situ formation of such planets from embryos. Previous N-body studies of instability amongst transiting planets have assumed that collisions result in perfect merging. Here, we explore the effects of implementing a more realistic collision prescription on t

This article is over 5 years old, and the information may therefore be outdated. Some people say it’s about time, and Deputy Vice-Chancellor Eva Wiberg agrees that the time is now ripe. After an intensive week in South Africa and Botswana, with visits to seven universities, alumni events and official openings, it is time for Lund University to put its Africa strategy down on paper. The delegation

https://www.staff.lu.se/article/university-visits-first-step-towards-africa-strategy - 2026-05-19

Raquel Garza Gómez is a Ph.D. student at Lund University, who will be defending her thesis on January 19, 2024. With a background in computational biology, Raquel's research focuses on studying the role of transposable elements in the human brain. Transposable elements refer to DNA sequences capable of moving from one part of the genome to another. Her research aims to provide a better understandi

https://www.multipark.lu.se/article/transposable-elements-healthy-and-diseased-human-brain-phd-interview-raquel-garza-gomez - 2026-05-19

En forskargrupp vid partikelacceleratorn Large Hadron Collider (LHC) har nyligen visat att för en viss mätning så stämmer inte data från experiment överens med resultat från datorsimuleringar. Mätningen som gjordes var en undersökning av vinkelrelationer mellan de partiklar som bildas när andra partiklar kollideras vid väldigt hög energi, vilket innebär en hastighet väldigt nära ljusets. De partiAn analysis of two-particle angular correlations was recently performed on measurements taken from pp collisions at $\sqrt{s}$ = 7 TeV by ALICE at the LHC. The correlations for mesons are in good agreement with simulations performed in Monte Carlo event generators such as PYTHIA and PHOJET, but there is a significant difference for baryons. We here investigate particle production mechanisms in PYT

Allting är uppbyggt av atomer, inte bara träd, djur eller bläcket i dessa bokstäver, utan även astronomiska objekt så som stjärnor och planeter. Stjärnor är i princip extremt varma och kompakta moln av atomer, som skickar ut ljus i alla riktningar. Astronomer är intresserade av vilken sammansättning av atomer som bygger upp stjärnor eftersom detta hjälper dem att förstå hur stjärnor och galaxer biStellar abundances are important for understanding the chemical evolution of galaxies and provide us with constraints on stellar evolution and supernova nucleosynthesis. To determine stellar abundances accurately, atomic data is crucial. This data is incomplete for many elements, especially in the infrared region. In particular, hyperfine structure (hfs) data in the near-infrared region is lacking