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- Campbell, Heather, et al.
(författare)
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COSMOLOGY WITH PHOTOMETRICALLY CLASSIFIED TYPE Ia SUPERNOVAE FROM THE SDSS-II SUPERNOVA SURVEY
- 2013
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Ingår i: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 763:2, s. 88-
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Tidskriftsartikel (refereegranskat)abstract
- We present the cosmological analysis of 752 photometrically classified Type Ia Supernovae (SNe Ia) obtained from the full Sloan Digital Sky Survey II (SDSS-II) Supernova (SN) Survey, supplemented with host-galaxy spectroscopy from the SDSS-III Baryon Oscillation Spectroscopic Survey. Our photometric-classification method is based on the SN classification technique of Sako et al., aided by host-galaxy redshifts (0.05 < z < 0.55). SuperNova ANAlysis simulations of our methodology estimate that we have an SN Ia classification efficiency of 70.8%, with only 3.9% contamination from core-collapse (non-Ia) SNe. We demonstrate that this level of contamination has no effect on our cosmological constraints. We quantify and correct for our selection effects (e. g., Malmquist bias) using simulations. When fitting to a flat.CDM cosmological model, we find that our photometric sample alone gives Omega(m) = 0.24(-0.05)(+0.07) (statistical errors only). If we relax the constraint on flatness, then our sample provides competitive joint statistical constraints on Omega(m) and Omega(Lambda), comparable to those derived from the spectroscopically confirmed Three-year Supernova Legacy Survey (SNLS3). Using only our data, the statistics-only result favors an accelerating universe at 99.96% confidence. Assuming a constant wCDM cosmological model, and combining with H-0, cosmic microwave background, and luminous red galaxy data, we obtain w = -0.96(-0.10)(+0.10), Omega(m) = 0.29(-0.02)(+0.02), and Omega(k) = 0.00(-0.02)(+0.03)(statistical errors only), which is competitive with similar spectroscopically confirmed SNe Ia analyses. Overall this comparison is reassuring, considering the lower redshift leverage of the SDSS-II SN sample (z < 0.55) and the lack of spectroscopic confirmation used herein. These results demonstrate the potential of photometrically classified SN Ia samples in improving cosmological constraints.
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| 2. |
- Kuhlin, Joel, et al.
(författare)
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Ledare
- 2020
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Ingår i: Svensk Teologisk Kvartalskrift. - 0039-6761. ; 96:4, s. 293-296
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Kuhlin, Julia
(författare)
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Lived Pentecostalism in India : Middle Class Women and Their Everyday Religion
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In recent decades, the Pentecostal movement in India has not only grown significantly, it has also become increasingly diverse. While the majority of the movement’s adherents still belong to marginalized groups in Indian society, middle-class Pentecostals are growing in number and changing the dynamics and identity of the movement. This dissertation explores middle-class Pentecostal Christianity as a lived religion in India. More precisely, the aim is to better understand how female members of middle-class Pentecostal churches express and experience their religion in the context of their everyday lives. In addition, it examines what it might mean to be a Pentecostal and middle class in contemporary India. The analysis suggests that, for the participants, it was a relational project to live as a Pentecostal. The women were engaged in a common effort together with God to realize shared goals connected to their religious lives, such as, working on the self and living according to God’s plan. While largely dismissing rigid and ritualistic religious behavior codes, the women were nonetheless in agreement on the importance of living a Christ-like life. However, in contrast to many other Indian Pentecostal contexts, this moral imperative did not involve withdrawal from “the world”. Rather, it was closely related to their emotional lives in that they strived to resemble Christ by being loving, humble, and grateful. The study also draws attention to how the women’s religion, to a significant extent, revolved around handling worries and concerns. Despite being in a privileged economic position that provided the women with a relatively comfortable standard of living, they experienced their everyday lives as unstable and insecure. The analysis shows how their religion was a resource that empowered and aided them in tackling these uncertainties while at the same time brought on a sense of vulnerability. The study is based on six months of fieldwork in the North Indian city of Gurugram. The participants were members of the two middle-class churches, Loving Assemblies of God and Church of All Nations. During the fieldwork, a combination of methods was used, namely, participant observation, semi-structured interviews, and diaries.
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| 7. |
- Dub, S. N., et al.
(författare)
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Theoretical shear strength and the onset of plasticity in nanodeformation of cubic boron nitride
- 2017
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Ingår i: Journal of Superhard Materials. - 1063-4576. ; 39:2, s. 88-98
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Tidskriftsartikel (refereegranskat)abstract
- The nanoindentation in the continuous stiffness measurement mode was used to investigate the onset of plasticity at the nanodeformation of cubic boron nitride (cBN). This technique allows us to reveal an elastic-plastic transition in the contact and to measure the yield strength of cBN at the nanoscale. An abrupt elastoplastic transition (a pop-in) was observed in the (111) cBN single crystal as a result of a homogeneous or heterogeneous nucleation of dislocations in the previously dislocations-free region under the contact. The analysis of the data obtained at the homogeneous nucleation of dislocations in the contact region made it possible to experimentally estimate the theoretical shear strength of cBN and its ideal (elastic) hardness. In a sample of the fine-grained cBN with a nanotwinned substructure a smooth elastoplastic transition was observed in consequence of the propagation and multiplication of already existing dislocations in the contact region.
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