R
Robert F. Carswell
Researcher at University of Cambridge
Publications - 176
Citations - 7613
Robert F. Carswell is an academic researcher from University of Cambridge. The author has contributed to research in topics: Redshift & Quasar. The author has an hindex of 47, co-authored 175 publications receiving 7219 citations.
Papers
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Journal ArticleDOI
Indications of a Spatial Variation of the Fine Structure Constant
John K. Webb,Julian A. King,Michael T. Murphy,Victor V. Flambaum,Robert F. Carswell,Matthew B. Bainbridge +5 more
TL;DR: New Very Large Telescope (VLT) data shows an inverse evolution; α increases at high redshift; the combined data set fits a spatial dipole, significant at the 4.2 σ level.
Journal ArticleDOI
Spatial variation in the fine-structure constant – new results from VLT/UVES
Julian A. King,John K. Webb,Michael T. Murphy,Victor V. Flambaum,Robert F. Carswell,Matthew B. Bainbridge,Michael R. Wilczynska,F. Elliot Koch +7 more
TL;DR: In this article, an analysis of a large sample of quasar absorption-line spectra obtained using the Ultraviolet and Visual Echelle Spectrograph (UVES) on the Very Large Telescope (VLT) in Chile is presented.
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Absorption Lines in the Spectra of Quasistellar Objects
TL;DR: In this paper, it was pointed out that the large increase in both the quality and quantity of QSO absorption line data over the last four years has been in large measure due to the development of excellent high-resolution detectors, e.g. the IPCS (Boksenberg 1972).
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Evidence for structure in the H I column density distribution of QSO absorbers
P. Petitjean,P. Petitjean,P. Petitjean,John K. Webb,M. Rauch,M. Rauch,Robert F. Carswell,K. Lanzetta +7 more
TL;DR: In this paper, the H I column density distribution function of QSO absorption line systems is investigated using recent data with high spectral resolution, and extensive surveys of the Lyman limit systems and damped Ly-alpha systems.
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Possible evidence for an inverted temperature–density relation in the intergalactic medium from the flux distribution of the Lyα forest
TL;DR: In this paper, the authors compare the improved measurement of the Lya forest flux probability distribution at 1.7 < z < 3.2 presented by Kim et al. to a large set of hydrodynamical simulations of Lya forests with different cosmological parameters and thermal histories.