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On characterizing the variability properties of X-ray light curves from active galaxies
TLDR
It is demonstrated that σ 2 XS (or similarly F v a r ) shows large changes from one part of the light curve to the next, even when the variability is produced by a stationary process, which limits the usefulness of these estimators for quantifying differences in variability amplitude between different sources or from epoch to epoch in one source.
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A Universal Stellar Initial Mass Function? A critical look at variations in extreme environments
Whether the stellar initial mass function (IMF) is universal or is instead sensitive to environmental conditions is of critical importance: The IMF influences most observable properties of stellar…
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The UKIRT Infrared Deep Sky Survey ZY JHK photometric system: passbands and synthetic colours
The UKIRT Infrared Deep Sky Survey is a set of v e surveys of complementary combinations of area, depth, and Galactic latitude, which began in 2005 May. The surveys use the UKIRT Wide Field Camera…
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The Masses of the Milky Way and Andromeda galaxies
We present a family of robust tracer mass estimators to compute the enclosed mass of galaxy haloes from samples of discrete positional and kinematical data of tracers, such as halo stars, globular…
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An investigation of cooling flows and general cluster properties from an X-ray image deprojection analysis of 207 clusters of galaxies
We present an X-ray image deprojection analysis of Einstein Observatory imaging data on 207, clusters of galaxies. The resulting radial profiles for luminosity, temperature, and electron density…
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Surface brightness profiles and structural parameters for 53 rich stellar clusters in the Large Magellanic Cloud
We have compiled a pseudo-snapshot data set of two-colour observations from the Hubble Space Telescope archive for a sample of 53 rich LMC clusters with ages of 106–1010 yr. We present surface…
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A long hard look at MCG–6-30-15 with XMM-Newton
We present the first results from a 325-ks observation of the Seyfert 1 galaxy MCG–6-30-15 with XMM-Newton and BeppoSAX. The strong, broad, skewed iron line is clearly detected and is well…
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Black hole winds
Also available at http://www.blackwell-synergy.com/doi/abs/10.1046/j.1365-8711.2003.06980.x. The definitive version is available at www.blackwell-synergy.com.
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The Luminosity Function of the Milky Way Satellites
We quantify the detectability of stellar Milky Way satellites in the Sloan Digital Sky Survey (SDSS) Data Release 5. We show that the effective search volumes for the recently discovered SDSS…
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The star formation rate of the Universe at z~ 6 from the Hubble Ultra-Deep Field
We determine the abundance of i′-band dropouts in the recently released HST/ACS Hubble Ultra-Deep Field (UDF). Because the majority of these sources are likely to be z≈ 6 galaxies whose flux…
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