Search Results - "Pounds, Ken"

Powerful Outflows and Feedback from Active Galactic Nuclei by King, Andrew, Pounds, Ken

“…Active galactic nuclei (AGNs) represent the growth phases of the supermassive black holes in the center of almost every galaxy. Powerful, highly ionized winds,…”
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X-Ray Spectral Variability and Rapid Variability of the Soft X-Ray Spectrum Seyfert 1 Galaxies Arakelian 564 and Ton S180 by Edelson, Rick, Turner, T. J, Pounds, Ken, Vaughan, Simon, Markowitz, Alex, Marshall, Herman, Dobbie, Paul, Warwick, Robert

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Low-redshift absorption in the Seyfert galaxy PG1211+143 – a distant inflow maintaining off-plane accretion or the gravitational redshift of matter orbiting the SMBH? by Pounds, Ken, Page, Kim

“…The detection of a high-velocity (∼0.3c) inflow of highly ionized matter during an extended XMM–Newton observation of the luminous Seyfert galaxy PG1211+143 in…”
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X-Ray Observations of Powerful AGN Outflows: Implications for Feedback by Pounds, Ken

“…Highly ionised winds with velocities ∼0.1–0.2 c were first detected in X-ray spectra of non-BAL AGN a decade ago. Subsequent observations and archival searches…”
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X-ray UK by Pounds, Ken

“…Ken Pounds reviews the history of X-ray astronomy in the UK, more than half a century of fruitful science and instrument development. Abstract Ken Pounds…”
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Forty years on from Aerobee 150: a personal perspective by Pounds, Ken

“…A brief account of those early years in X–ray astronomy is given, from a personal (UK) perspective, as an introduction to the review of the current status of…”
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Riccardo Giacconi 1931–2018 by Pounds, Ken

“…Riccardo Giacconi Abstract The pioneer of X-ray astronomy and Nobel Prize winner is remembered by Ken Pounds…”
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Searching for Black Holes in Space: The Key Role of X-Ray Observations by Pounds, Ken

“…Although General Relativity had provided the physical basis of black holes, evidence for their existence had to await the Space Era when X-ray observations…”
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X-ray astronomy and Eddington winds by Pounds, Ken

“…X-rays are transforming our knowledge of AGN, says Ken Pounds. Ken Pounds looks at how X-ray observations continue to transform our understanding of active…”
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Detection of a second high-velocity component in the highly ionized wind from PG 1211+143 by Pounds, Ken, Lobban, Andrew, Reeves, James, Vaughan, Simon

“…An extended XMM–Newton observation of the luminous narrow line Seyfert galaxy PG1211+143 in 2014 has revealed a more complex highly ionized, high-velocity…”
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25 years of NAM by Pounds, Ken

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25 years of NAM by Pounds, Ken

“…The National Astronomy Meeting is in its 25th year. Ken Pounds looks back at how it started and how it has evolved…”
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How the RAS helped launch Tim into space by Pounds, Ken

“…Ken Pounds explains how a report by the Royal Astronomical Society changed UK policy on human space exploration…”
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On why the iron K-shell absorption in AGN is not a signature of the local warm/hot intergalactic medium by Reeves, James, Done, Chris, Pounds, Ken, Terashima, Yuichi, Hayashida, Kiyoshi, Anabuki, Naohisa, Uchino, Masahiro, Turner, Martin

“…We present a comparison between the 2001 XMM–Newton and 2005 Suzaku observations of the quasar, PG 1211+143, at z = 0.0809. Variability is observed in the 7…”
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Erratum: Detection of a second high-velocity component in the highly ionized wind from PG 1211+143 by Pounds, Ken, Lobban, Andrew, Reeves, James, Vaughan, Simon

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Are ultrafast inflows in AGN truly rare -- or just much harder to see? by Pounds, Ken

“…Short-term variability and multiple velocity components in the powerful highly ionized wind of the archetypal UFO PG 1211+143 are indicative of inner disc…”
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The Royal Society's formative role in UK space research by Pounds, Ken

“…Before the formation of the Science Research Council (SRC) in 1965, the Royal Society played the key role, as both advocate and adviser to relevant government…”
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Low-redshift absorption in the Seyfert galaxy PG 1211+143 -- a distant inflow maintaining off-plane accretion or the gravitational redshift of matter orbiting the SMBH? by Pounds, Ken, Page, Kim

“…The detection of a high velocity (~ 0.3c) inflow of highly ionized matter during an extended XMM-Newton observation of the luminous Seyfert galaxy PG 1211+143…”
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Observing the launch of an Eddington wind in the luminous Seyfert galaxy PG1211+143 by Pounds, Ken, Nayakshin, Sergei

“…The luminous narrow line Seyfert galaxy PG1211+143 was the first non-BAL AGN to reveal a powerful ionized wind, based on early observations with ESA's XMM…”
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X-ray reflection in the nearby Seyfert 2 galaxy NGC 1068 by Pounds, Ken, Vaughan, Simon

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