Institution
University of Portsmouth
Education•Portsmouth, Portsmouth, United Kingdom•
About: University of Portsmouth is a education organization based out in Portsmouth, Portsmouth, United Kingdom. It is known for research contribution in the topics: Population & Galaxy. The organization has 5452 authors who have published 14256 publications receiving 424346 citations. The organization is also known as: Portsmouth and Gosport School of Science and Art & Portsmouth and Gosport School of Science and the Arts.
Topics: Population, Galaxy, Redshift, Poison control, Fuzzy logic
Papers published on a yearly basis
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TL;DR: In this article, the authors discuss how future observational data could distinguish between inflation driven by one field, or many fields, and briefly review the curvation as an alternative to the inflaton scenario for the origin of structure.
Abstract: Inflation offers a simple model for very early evolution of our universe and the origin of primordial perturbations on large scales. Over the last 25 years we have become familiar with the predictions of single-field models, but inflation with more than one light scalar field can alter preconceptions about the inflationary dynamics and our predictions for the primordial perturbations. I will discuss how future observational data could distinguish between inflation driven by one field, or many fields. As an example, I briefly review the curvation as an alternative to the inflaton scenario for the origin of structure.
181 citations
University of Manchester1, City University of New York2, Istanbul Technical University3, New York University4, Heidelberg University5, Niels Bohr Institute6, University of Edinburgh7, University of Bologna8, Academy of Athens9, Sapienza University of Rome10, University of Naples Federico II11, Stanford University12, Institut d'Astrophysique de Paris13, University of Portsmouth14, Cardiff University15, Universidade Federal do Espírito Santo16, University of Michigan17, Asia Pacific Center for Theoretical Physics18, University of New Mexico19, University of Barcelona20, Centre national de la recherche scientifique21, Princeton University22, National Autonomous University of Mexico23, Jet Propulsion Laboratory24, INAF25, University of Chicago26, Michigan Technological University27, University of Cambridge28, Imperial College London29, Ruhr University Bochum30, University of Waterloo31, Johns Hopkins University32, University of Pennsylvania33, University of California, Davis34, Birla Institute of Technology and Science35, RWTH Aachen University36, Université libre de Bruxelles37, University of Padua38, Indian Institute of Technology Kharagpur39, Spanish National Research Council40, University of North Carolina at Chapel Hill41, University of Arizona42, University of Oslo43, Jamia Millia Islamia44, National Institute for Space Research45, Fermilab46, Presidency University, Kolkata47, Université Paris-Saclay48, University of Montpellier49, University of Szczecin50, Korea Astronomy and Space Science Institute51, University of California, Los Angeles52, Leiden University53, University of Southern Denmark54, Swarthmore College55, University of Sheffield56, University of Amsterdam57, United College, Winnipeg58, Liaoning Normal University59
TL;DR: In this article, the authors focus on the tension between Planck data and weak lensing measurements and redshift surveys, and discuss the importance of trying to fit multiple cosmological datasets with complete physical models, rather than fitting individual datasets with a few handpicked theoretical parameters.
181 citations
TL;DR: UK police officers surveyed regarding their perceptions of eyewitnesses and eyewitness performance believed that eyewitnesses are rarely incorrect and that witnesses rarely come forward to the police and that those who do are often reluctant to testify in court.
Abstract: Few contemporary data support the assertion that eyewitnesses are important in police investigations. In the present study, 159 UK police officers were surveyed regarding their perceptions of eyewitnesses and eyewitness performance. The respondents indicated that eyewitnesses usually provide the central leads in criminal investigations; however, the police officers also believed that eyewitnesses rarely provide sufficient information, especially descriptive details as opposed to action details. Nevertheless, the officers believed that eyewitnesses are rarely incorrect. A sizable minority reported that witnesses rarely come forward to the police and that those who do are often reluctant to testify in court. Many officers indicated that they do not have enough time to conduct good eyewitness interviews.
181 citations
INAF1, University of Nottingham2, University of Arizona3, Max Planck Society4, University of Copenhagen5, California Institute of Technology6, École Polytechnique Fédérale de Lausanne7, University of Portsmouth8, University of Edinburgh9, Ohio University10, University of Toulouse11, Herzberg Institute of Astrophysics12
TL;DR: In this article, a spectral analysis of galaxies in clusters, groups, poor groups, and the field at z = 0.4-0.8 based on the ESO Distant Cluster Survey was performed.
Abstract: Post-starburst (E+A or k+a) spectra, characterized by their exceptionally strong Balmer lines in absorption and the lack of emission lines, belong to galaxies in which the star formation (SF) activity ended abruptly sometime during the past Gyr. We perform a spectral analysis of galaxies in clusters, groups, poor groups, and the field at z = 0.4-0.8 based on the ESO Distant Cluster Survey. We find that the incidence of k+a galaxies at these redshifts depends strongly on environment. K+a's reside preferentially in clusters and, unexpectedly, in a subset of the σ = 200-400 km s^(–1) groups, those that have a low fraction of O II emitters. In these environments, 20%-30% of the star-forming galaxies have had their SF activity recently truncated. In contrast, there are proportionally fewer k+a galaxies in the field, the poor groups, and groups with a high O II fraction. An important result is that the incidence of k+a galaxies correlates with the cluster velocity dispersion: more massive clusters have higher proportions of k+a's. Spectra of dusty starburst candidates, with strong Balmer absorption and emission lines, present a very different environmental dependence from k+a's. They are numerous in all environments at z = 0.4-0.8, but they are especially numerous in all types of groups, favoring the hypothesis of triggering by a merger. We present the morphological type, stellar mass, luminosity, mass-to-light ratio, local galaxy density, and clustercentric distance distributions of galaxies of different spectral types. These properties are consistent with previous suggestions that cluster k+a galaxies are observed in a transition phase, at the moment they are rather massive S0 and Sa galaxies, evolving from star-forming, recently infallen later types to passively evolving cluster early-type galaxies. The correlation between k+a fraction and cluster velocity dispersion supports the hypothesis that k+a galaxies in clusters originate from processes related to the intracluster medium, while several possibilities are discussed for the origin of the puzzling k+a frequency in low-O II groups.
180 citations
Institute for the Physics and Mathematics of the Universe1, University of Oxford2, Institut d'Astrophysique de Paris3, Chulalongkorn University4, University of Tokyo5, University of Portsmouth6, University of Kentucky7, University of Wisconsin-Madison8, Princeton University9, Johns Hopkins University10, University of Texas at Austin11, Space Telescope Science Institute12, Open University13, University of St Andrews14, Harvard University15, University of Cambridge16, Nanjing University17, New York University Abu Dhabi18, New Mexico State University19, University of La Serena20, Pennsylvania State University21
TL;DR: Bisymmetric emission features co-aligned with strong ionized-gas velocity gradients are reported from which it is inferred the presence of centrally driven winds in typical quiescent galaxies that host low-luminosity active nuclei.
Abstract: This is the author accepted manuscript. The final version is available from the Nature Publishing Group via https://doi.org/10.1038/nature18006
180 citations
Authors
Showing all 5624 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Robert C. Nichol | 187 | 851 | 162994 |
| Gavin Davies | 159 | 2036 | 149835 |
| Daniel Thomas | 134 | 846 | 84224 |
| Will J. Percival | 129 | 473 | 87752 |
| Claudia Maraston | 103 | 362 | 59178 |
| I. W. Harry | 98 | 312 | 65338 |
| Timothy Clark | 95 | 1137 | 53665 |
| Kevin Schawinski | 95 | 376 | 30207 |
| Ashley J. Ross | 90 | 248 | 46395 |
| Josep Call | 90 | 451 | 34196 |
| David A. Wake | 89 | 214 | 46124 |
| L. K. Nuttall | 89 | 253 | 54834 |
| Stephen Neidle | 89 | 457 | 32417 |
| Andrew Lundgren | 88 | 249 | 57347 |
| Rita Tojeiro | 87 | 229 | 43140 |