| 61. |
- Thompson, B. B., et al.
(författare)
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The Gaia-ESO survey : Matching chemodynamical simulations to observations of the Milky Way
- 2018
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Ingår i: Monthly Notices of the Royal Astronomical Society. - 0035-8711. ; 473:1, s. 185-197
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Tidskriftsartikel (refereegranskat)abstract
- The typical methodology for comparing simulated galaxies with observational surveys is usually to apply a spatial selection to the simulation to mimic the region of interest covered by a comparable observational survey sample. In this work, we compare this approach with a more sophisticated post-processing in which the observational uncertainties and selection effects (photometric, surface gravity and effective temperature) are taken into account. We compare a 'solar neighbourhood analogue' region in a model MilkyWay-like galaxy simulated with RAMSES-CH with fourth release Gaia-ESO survey data. We find that a simple spatial cut alone is insufficient and that the observational uncertainties must be accounted for in the comparison. This is particularly true when the scale of uncertainty is large compared to the dynamic range of the data, e.g. in our comparison, the [Mg/Fe] distribution is affected much more than the more accurately determined [Fe/H] distribution. Despite clear differences in the underlying distributions of elemental abundances between simulation and observation, incorporating scatter to our simulation results to mimic observational uncertainty produces reasonable agreement. The quite complete nature of the Gaia-ESO survey means that the selection function has minimal impact on the distribution of observed age and metal abundances but this would become increasingly more important for surveys with narrower selection functions.
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| 62. |
- Thompson, T.M, et al.
(författare)
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Genetic variation in DRD4, criminality and conduct disorder
- 2011
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Ingår i: Personality and individual differences. - New York : Nova Science Publishers Inc.. - 9781611225884
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Bokkapitel (refereegranskat)abstract
- Personality and individual differences research is relevant to practically every facet of human existence. For instance, since theories of persons either explicitly or implicitly guide clinical work, the field contributes to discussions of understanding abnormal psychology and provides a guide for conceptualising best treatment. Additionally, the field is relevant to understanding human development across the lifespan, and our understanding of personality and individual differences impacts upon our views of socialisation and interpersonal relations. This book presents research which draws attention to the rich scientific literature that continues to emerge with respect to personality and individual differences psychology.
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| 63. |
- Usman, Sam A., et al.
(författare)
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Multiple populations and a CH star found in the 300S globular cluster stellar stream
- 2024
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Ingår i: Monthly notices of the Royal Astronomical Society. - 0035-8711 .- 1365-2966. ; 529:3, s. 2413-2427
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Tidskriftsartikel (refereegranskat)abstract
- Milky Way globular clusters (GCs) display chemical enrichment in a phenomenon called multiple stellar populations (MSPs). While the enrichment mechanism is not fully understood, there is a correlation between a cluster’s mass and the fraction of enriched stars found therein. However, present-day GC masses are often smaller than their masses at the time of formation due to dynamical mass-loss. In this work, we explore the relationship between mass and MSPs using the stellar stream 300S. We present the chemical abundances of eight red giant branch member stars in 300S with high-resolution spectroscopy from Magellan/MIKE. We identify one enriched star characteristic of MSPs and no detectable metallicity dispersion, confirming that the progenitor of 300S was a GC. The fraction of enriched stars (12.5 per cent) observed in our 300S stars is less than the 50 per cent of stars found enriched in Milky Way GCs of comparable present-day mass (∼104.5 M⊙). We calculate the mass of 300S’s progenitor and compare it to the initial masses of intact GCs, finding that 300S aligns well with the trend between the system mass at formation and enrichment. 300S’s progenitor may straddle the critical mass threshold for the formation of MSPs and can therefore serve as a benchmark for the stellar enrichment process. Additionally, we identify a CH star, with high abundances of s-process elements, probably accreted from a binary companion. The rarity of such binaries in intact GCs may imply stellar streams permit the survival of binaries that would otherwise be disrupted.
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| 64. |
- Wiklund, G, et al.
(författare)
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Impulsivity Research: New Data and Future Perspectives and presenter of Pro-bullying attitudes among incarcerated juvenile offenders: The relation to delinquency, aggression, psychopathy and violence.
- 2006
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Ingår i: The International Society for the Study of Impulsivity (ISRI) Regional Workshop.
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Konferensbidrag (populärvet., debatt m.m.)abstract
- A new scale to assess pro-bullying attitudes, the Pro-Bullying Attitude Scale (PAS) was evaluated in 259 voluntarily recruited male juvenile delinquents in Russia. Exploratory factor analysis gave a two-factor solution: Callous Dominance (CD) and Manipulativeness/ Impulsiveness (MI). The subjects were divided into three groups (low, intermediate, high) according to their scores on PAS and its two factors. Low and high group Ss were compared and results indicated higher delinquent and aggressive behavior among high group Ss as assessed by the Youth Self Report (YSR) and violent behavior as assessed by the Antisocial Behavior Checklist (ABC), as well as higher scores on the personality trait Novelty seeking and lower on Cooperativeness as assessed by the Temperament and Character Inventory (Cloninger et al., 1994). High PAS and CD groups displayed significantly higher scores on psychopathy traits as assessed by the Childhood Psychopathy Scale (Lynam, 1997) significantly related to registered violent crime. Probullying attitudes are discussed as a link between personality and psychopathy on the one hand and antisocial and violent behavior on the other. The PAS is also discussed in terms of usefulness in identifying high-risk individuals for violent behavior among incarcerated delinquents and in preventing violence and bullying tendencies in juvenile forensic institutions.
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