Browsing by Title
Now showing items 20510-20529 of 24069
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Spectacles, Sport and Soviet ideology in the 1930s
(2010-07-02)After the October Revolution of 1917, the Bolsheviks embarked on an extensive, long-lasting, and very successful campaign to encourage the population of the Soviet Union to engage with sport and physical culture. The initial ... -
A Spectacular Bow Shock in the 11 keV Galaxy Cluster Around 3C 438
(2017-01-11)We present results of deep 153 ks Chandra observations of the hot, 11 keV, galaxy cluster associated with the radio galaxy 3C 438. By mapping the morphology of the hot gas and analyzing its surface brightness and temperature ... -
Spectra probing the number ratio of C-to M-type AGB stars in the NGC 6822 galaxy.
(2012-01)Aims. We calibrate spectroscopically the C-versus (vs.) M-type asymptotic giant branch (AGB) star selection made using near-IR photometry, and investigate the spatial distribution of the C/M ratio in NGC 6822, based on low ... -
Spectral age modelling of the 'Sausage' cluster radio relic
(2014-12-01)CIZA J2242.8+5301 is a post-core passage, binary merging cluster that hosts a large, thin, arc-like radio relic, nicknamed the 'Sausage', tracing a relatively strong shock front. We perform spatially resolved spectral ... -
Spectral ageing in the era of big data : Integrated versus resolved models
(2017-04-21)Continuous injection models of spectral ageing have long been used to determine the age of radio galaxies from their integrated spectrum; however, many questions about their reliability remain unanswered. With various large ... -
Spectral ageing in the lobes of cluster-centre FR II radio galaxies
(2015-12-21)Recent investigations have shown that many parameters and assumptions made in the application of spectral-ageing models to FR II radio galaxies (e.g. injection index, uniform magnetic field, non-negligible cross-lobe age ... -
Spectral ageing in the lobes of FR-II radio galaxies : New methods of analysis for broad-band radio data
(2013-11-01)The broad-bandwidth capabilities of next generation telescopes such as the Jansky Very Large Array (JVLA) mean that the spectrum of any given source varies significantly within the bandwidth of any given observation. ... -
Spectral Ageing in the Most Powerful Radio Galaxies
(2017-02-08)Radio-loud AGN represent the most energetic and influential large-scale structures in the Universe. Through physical processes such as AGN feedback, they are suggested to play a major role in the evolution of galaxies. ... -
Spectral analysis of hot subluminous stars
(Astronomical Society of the Pacific, 1999)Optical spectra of 40 sdOB stars drawn from the Palomar Green and the Hamburg-Schmidt surveys are presented (including three EC 14026 stars). Eight of which are spectroscopic binaries. -
Spectral analysis of sdB Stars from the Hamburg ESO Survey
(Astronomical Society of the Pacific, 2001)We aim at the compilation of a statistically complete sample of sdB stars in the southern hemisphere. Candidates are selected from the database of digitized spectra of the Hamburg/ESO objective prism survey. First simulations ... -
Spectral analysis of spatially-resolved 3C295 (sub-arcsecond resolution) with the International LOFAR Telescope
(2022-02-25)3C295 is a bright, compact steep spectrum source with a well-studied integrated radio spectral energy distribution (SED) from 132 MHz to 15 GHz. However, spatially resolved spectral studies have been limited due to a lack ... -
Spectral analysis of the binary sdB star Feige 36
(Astronomical Society of the Pacific, 1999)The sdB stars Feige 36 is a short-period, single-lined spectroscopic binary. Aymospheric parameters and abundances are determined from high-resolution Keck spectra. Feige 36 lies near the zero-age extreme Horizontal Branch ... -
Spectral analysis of the DNA targeting bisalkylaminoanthraquinone DRAQ5 in intact living cells
(2006-08)We report on the potential DNA binding modes and spectral characteristics of the cell-permeant far red fluorescent DNA dye, DRAQ5, in solution and bound within intact cells. Our aim was to determine the constraints for its ... -
Spectral analysis of water vapour in cool stars
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The Spectral and Temporal Properties of Transient Sources in Early-type Galaxies
(2012-08-20)We report the spectral and temporal variability properties of 18 candidate transient (TC) and potential transient (PTC) sources detected in deep multi-epoch Chandra observation of the nearby elliptical galaxies, NGC3379, ... -
Spectral classification of photometrically selected AGB candidates in NGC 6822
(2015-02-02)Context. The ratio of C- and M-type asymptotic giant branch (AGB) stars is commonly used to estimate the metallicity of extragalactic populations. Sources in the AGB population must therefore be accurately classified as ...