The X-ray Spectra of the Luminous LMXBs in NGC 3379: Field and Globular Cluster Sources (2010)
Brassington, N. J., Fabbiano, G., Blake, S., Zezas, A., Angelini, L., Davies, R. L., ...
From a deep multi-epoch Chandra observation of the elliptical galaxy NGC 3379 we report the spectral properties of nine luminous LMXBs (LX>1E38 erg/s). We also present a set of spectral simulations,...
The Accretion Disc Dynamo in the Solar Nebula (2010)
The nearest accretion disc to us in space if not time was the protosolar nebula. Remnants of this nebula thus potentially offer unique insight into how discs work. In particular the existence of...
I show that Eddington accretion episodes in AGN are likely to produce winds with velocities $v \sim 0.1c$ and ionization parameters up to $\xi \sim 10^4$ (cgs), implying the presence of resonance...
Black hole mergers: the first light (2009)
Rossi, Elena M., Lodato, G., Armitage, P. J., Pringle, J. E., King, A. R.
The coalescence of supermassive black hole binaries occurs via the emission of gravitational waves, that can impart a substantial recoil to the merged black hole. We consider the energy dissipation,...
Black hole mergers: can gas discs solve the `final parsec' problem? (2009)
Lodato, G., Nayakshin, S., King, A. R., Pringle, J. E.
We compute the effect of an orbiting gas disc in promoting the coalescence of a central supermassive black hole binary. Unlike earlier studies, we consider a finite mass of gas with explicit time...
RS Ophiuchi: Thermonuclear Explosion or Disc Instability? (2009)
Sokoloski et al (2008) have recently reported evidence that the recurrent nova RS Ophiuchi produced a pair of highly collimated radio jets within days of its 2006 outburst. This suggests that an...
Episodic Random Accretion and the Cosmological Evolution of Supermassive Black Hole Spins (2009)
Wang, J. -M., Hu, C., Li, Y. -R., Chen, Y. -M., King, A. R., Marconi, A., ...
The growth of supermassive black holes (BHs) located at the centers of their host galaxies comes mainly from accretion of gas, but how to fuel them remains an outstanding unsolved problem in quasar...
The Growth of Supermassive Black Holes Across Cosmic Time (2009)
Nandra, K., Aird, J. A., Alexander, D. M., Ballantyne, D. R., Barcons, X., Bauer, F. E., ...
One of the main themes in extragalactic astronomy for the next decade will be the evolution of galaxies over cosmic time. Many future observatories, including JWST, ALMA, GMT, TMT and E-ELT will...
Comparing GC and Field LMXBs in Elliptical Galaxies with deep Chandra and Hubble data (2009)
Kim, D. -W., Fabbiano, G., Brassington, N. J., Fragos, T., Kalogera, V., Zezas, A., ...
(abridged) We present a statistical study of the low-mass X-ray binary (LMXB) populations of three nearby, old elliptical galaxies: NGC 3379, NGC 4278, and NGC 4697. With a cumulative ~1 Ms Chandra...
Deep Chandra Monitoring Observations of NGC 4278: Catalog of Source Properties (2009)
Brassington, N. J., Fabbiano, G., Kim, D. -W., Zezas, A., Zepf, S., Kundu, A., ...
We present the properties of the discrete X-ray sources detected in our monitoring program of the globular cluster (GC) rich elliptical galaxy, NGC 4278, observed with Chandra ACIS-S in six separate...
Transient Low-Mass X-Ray Binary Populations in Elliptical Galaxies NGC 3379 and NGC 4278 (2009)
Fragos, T., Kalogera, V., Willems, B., Belczynski, K., Fabbiano, G., Brassington, N. J., ...
We propose a physically motivated and self-consistent prescription for the modeling of transient neutron star (NS) low-mass X-ray binary (LMXB) properties, such as duty cycle (DC), outburst duration...
The Growth of Supermassive Black Holes Across Cosmic Time (2009)
Nandra, K., Aird, J. A., Alexander, D. M., Ballantyne, D. R., Barcons, X., Bauer, F. E., ...
Masses, Beaming and Eddington Ratios in Ultraluminous X-ray Sources (2008)
I suggest that the beaming factor in bright ULXs varies as $b \propto \dot m^{-2}$, where $\dot m$ is the Eddington ratio for accretion. This is required by the observed universal $L_{\rm soft}...
Lodato, G., King, A. R., Pringle, J. E.
In this paper we revisit the arguments for the basis of the time evolution of the flares expected to arise when a star is disrupted by a supermassive black hole. We present a simple analytic model...
Discovery of Hot Gas in Outflow in NGC3379 (2008)
Trinchieri, G., Pellegrini, S., Fabbiano, G., Fu, R., Brassington, N. J., Zezas, A., ...
We report the discovery of a faint (L_x ~ 4 10^37 erg/s, 0.5-2 keV), out-flowing gaseous hot interstellar medium (ISM) in NGC 3379. This represents the lowest X-ray luminosity ever measured from a...
A recent paper (arXiv:0804.3463) claims that the presence of a soft X-ray component in an X-ray source in NGC 6946 provides strong evidence that its black hole mass is definitely $>100\msun$, and...
XMMU J134736.6+173403: an eclipsing LMXB in quiescence or a peculiar AGN? (2008)
Carpano, S., Altieri, B., King, A. R., Nucita, A., Leisy, P.
Aims. We report the discovery of a peculiar object observed serendipitously with XMM-Newton. We present its timing and spectral properties and investigate its optical counterpart. Methods. The light...
Accretion Rates and Beaming in Ultraluminous X-ray Sources (2008)
I show that extreme beaming factors $b$ are not needed to explain ULXs as stellar--mass binaries. For neutron star accretors one typically requires $b \sim 0.13$, and for black holes almost no...
The Evolution of Black Hole Mass and Spin in Active Galactic Nuclei (2008)
King, A. R., Pringle, J. E., Hofmann, J. A.
We argue that supermassive black hole growth in AGN occurs via sequences of randomly--oriented accretion discs with angular momentum limited by self--gravity. These stably co-- or counter--align with...
Fragos, T., Kalogera, V., Belczynski, K., Fabbiano, G., Kim, D. -W., Brassington, N. J., ...
We present theoretical models for the formation and evolution of populations of low-mass X-ray binaries (LMXB) in the two elliptical galaxies NGC 3379 and NGC 4278. The models are calculated with the...
Cygnus X-2, super-Eddington mass transfer, and pulsar binaries (2007)
King Ritter Astronomy, A. R. King, H. Ritter
We consider the unusual evolutionary state of the secondary star in Cygnus X-2. Spectroscopic data give a low mass (M 2 ' 0:5 \Gamma 0:7M fi ) and yet a large radius (R 2 ' 7R fi ) and high...
Global Analysis Of Mass Transfer Cycles In Cataclysmic Variables (2007)
King Frank, A. R. King, U. Kolb, H. Ritter
We give a global analysis of mass transfer variations in CVs. We show that limit cycles driven by variations of the secondary star's radius alone require this radius to be sensitive to the...
Deep Chandra Monitoring Observations of NGC 3379: Catalog of Source Properties (2007)
Brassington, N. J., Fabbiano, G., Kim, D. -W., Zezas, A., Zepf, S., Kundu, A., ...
We present the properties of the discrete X-ray sources detected in our monitoring program of the `typical' elliptical galaxy, NGC 3379, observed with Chandra ACIS-S in five separate pointings,...
The Dearth of low-luminosity Globular Cluster LMXBs in NGC 3379 (2007)
Fabbiano, G., Brassington, N. J., Zezas, A., Zepf, S., Angelini, L., Davies, R. L., ...
Our campaign of deep monitoring observations with {\it Chandra} of the nearby elliptical galaxy NGC 3379 has lead to the detection of nine globular cluster (GC) and 53 field low mass X-ray binaries...
Accretion disc viscosity: how big is alpha? (2007)
King, A. R., Pringle, J. E., Livio, M.
We consider observational and theoretical estimates of the accretion disc viscosity parameter $\alpha$. We find that in thin, fully-ionized discs, the best observational evidence suggests a typical...
Fuelling Active Galactic Nuclei (2007)
We suggest that most nearby active galactic nuclei are fed by a series of small--scale, randomly--oriented accretion events. Outside a certain radius these events promote rapid star formation, while...
Sung, H.Y., Guan, H.T., Czibula, A., King, A.R., Eder, K., Heath, E., ...
Migration and proliferation of smooth muscle cells are key to a number of physiological and pathological processes, including wound healing and the narrowing of the vessel wall.Previous work has...
Soft Gamma Repeaters and Short Gamma Ray Bursts: Making Magnetars from WD WD Mergers. (2007)
Chapman, R., Levan, A., Priddey, R., Tanvir, N., Wynn, G., King, A.R., ...
Soft Gamma Repeaters and Short Gamma Ray Bursts: making magnetars from WD-WD mergers (2006)
Chapman, R., Levan, A. J., Wynn, G. A., Davies, M. B., King, A. R., Priddey, R. S., ...
Recent progress on the nature of short duration Gamma Ray Bursts (GRBs) has shown that a fraction of them originate in the local universe. These systems may well be the result of giant flares from...
Young stars in the Galactic Centre: a potential intermediate-mass star origin (2006)
Dray, L. M., King, A. R., Davies, M. B.
There has been recent speculation (Davies & King 2005) that the cores of intermediate-mass stars stripped of their envelopes by tidal interaction with the supermassive black hole in the Galactic...
Probing the Low-Luminosity XLF in Normal Elliptical Galaxies (2006)
Kim, D. -W., Fabbiano, G., Kalogera, V., King, A. R., Pellegrini, S., Trinchieri, G., ...
We present the first low luminosity (LX > 5 - 10 1036 erg s-1) X-ray luminosity functions (XLFs) of low-mass X-ray binaries (LMXBs) determined for two typical old elliptical galaxies, NGC 3379 and...
Multiwavelength Observations of EXO 0748--676 -- II. Emission Line Behavior (2006)
Pearson, K. J., Hynes, R. I., Steeghs, D., Jonker, P. G., Haswell, C. A., King, A. R., ...
We present optical and ultraviolet spectra, lightcurves, and Doppler tomograms of the low-mass X-ray binary EXO 0748-676. Using an extensive set of 15 emission line tomograms, we show that, along...
Multiwavelength Observations of EXO 0748-676 - I. Reprocessing of X-ray Bursts (2006)
Hynes, R. I., Horne, K., O'Brien, K., Haswell, C. A., Robinson, E. L., King, A. R., ...
We present the first high time-resolution simultaneous X-ray, ultraviolet, and optical observations of X-ray bursts in UY Vol, the optical counterpart of the low mass X-ray binary EXO 0748-676,...
The Nature of SS433 and the Ultraluminous X-ray Sources (2006)
Begelman, M. C., King, A. R., Pringle, J. E.
The periodic precession (162--day) and nodding (6.3--day) motions of the jets in SS433 are driven in the outer regions of the disc, whereas the jets themselves, being relativistic, are launched near...
Short GRBs in old populations: Magnetars from WD-WD mergers (2006)
Levan, A., Wynn, G., Chapman, R., Davies, M., King, A.R., Priddey, R., ...
Multiwavelength Observations of EXO 0748-676. II. Emission-Line Behavior (2006)
Pearson, K.J., Hynes, R.I., Steeghs, D., Jonker, P.G., Haswell, C.A., King, A.R., ...
We present optical and ultraviolet spectra, light curves, and Doppler tomograms of the low-mass X-ray binary EXO 0748-676. Using an extensive set of 15 emission-line tomograms, we show that, along...
Recent X-ray observations have detected a class of very faint X-ray transients in the Galaxy which probably reveal a previously unrecognized type of accretion on to neutron stars or black holes. We...
Wolf-Rayet and O star runaway populations from supernovae. (2005)
Dray, L.M., Dale, J.E., Beer, M.E., Napiwotzki, R., King, A.R.
Disentangling x-ray reprocessing sites in exo 0748-676 (2004)
Brien , K. O., Charles , P. A., Haswell , C. A., Horne , K., Hynes , R. I., King , A. R., ...
Presentamos los primeros resultados de un estudio coordinado en múltiples longitudes de onda de la estrella de neutrones de la binaria de baja masa de rayos X, EXO 0748-676 (UY Vol). Se obtuvieron...
Baldi , A., Fabbiano , G., King , A. R., Ponman , T. J., Raymond , J. C., Schweizer , F., ...
Presentamos la función de luminosidad en rayos-X (XLF) de las galaxias de La Antena, basada en 8 observaciones llevadas a cabo con Chandra. Detectamos entre 37 y 49 fuentes en cada observación....
AE Aquarii: how cataclysmic variables descend from supersoft binaries (2002)
Schenker, K., King, A.R., Kolb, U., Wynn, G.A., Zhang, Z.
AE Aquarii (AE Aqr) is a propeller system. It has the shortest spin period among cataclysmic variables (CVs), and this is increasing on a 107 yr time-scale. Its ultraviolet spectrum shows very strong...
Haswell, C.A., Hynes, R.I., King, A.R., Schenker, K.
We compare ultraviolet (UV) spectra of the recent soft X-ray transients XTE J1118+480 and XTE J1859+226. The emission line strengths in XTE J1118+480 strongly suggest that the accreting material has...
R. Jaggi, Russell Addison, A. R. King, B. D. Suthers, Ronald Dickinson
This research looked at a novel metabolic pathway that challenges the old paradigm of the sequential nature of drug metabolism.
Chaty, S., Haswell, C.A., Hynes, R.I., Shrader, C.R., Cui, W., Mauche, C.W., ...
We report here on multiwavelength observations of the two new soft X-ray transients (SXTs) XTE J1859+226 and XTE J1118+480, which we observed with HST/RXTE/UKIRT. For XTE J1118+480 we also used EUVE...
Ultraluminous x-ray sources in external galaxies. (2001)
King, A. R., Davies, M. B., Ward, M. J., Fabbiano, G., Elvis, M.
We investigate models for the class of ultraluminous nonnuclear X-ray sources (i.e., ultraluminous compact X-ray sources [ULXs]) seen in a number of galaxies and probably associated with star-forming...
Superhumps in low mass X-ray binaries (2001)
Haswell, C.A, King, A.R, Murray, J.R, Charles, P.A
We propose a mechanism for the superhump modulations observed in optical photometry of at least two black-hole X-ray transients (SXTs). As in extreme mass-ratio cataclysmic variables (CVs),...
Mass estimates in short-period compact binaries (2001)
Kolb, U., King, A.R., Baraffe, I.
Using stellar models we investigate the relation between mass and the spectral type of the secondary star in low-mass short-period compact binaries such as cataclysmic variables and soft X-ray...
The minimum orbital period in thermal time-scale mass transfer (2001)
King, A.R., Schenker, K., Kolb, U., Davies, M.B.
We show that the usual picture of supersoft X-ray binary evolution as driven by conservative thermal time-scale mass transfer cannot explain the short orbital periods of RX J0537.7–7034 (3.5 h) and...
Superhumps in black hole X-ray transients (2001)
Haswell, C.A., Rolfe, D.J., King, A.R., Murray, J.R., Charles, P.A.
The superhumps in black hole X-ray transientsresult from a modulation in the area of the accretion disc. We discussimplications of this for parameter determinations in LMXBs.
Pharmacokinetics of [35s] PI-88 in rats (2001)
Creese, B., Ferro, V., King, A. R., Mardon, K. M., Dickinson, R. G., Punler, M.J., ...
Pharmacokinetics of [35s] PI-88 in rats (2001)
Creese, B., Ferro, V., King, A. R., Mardon, K. M., Dickinson, R. G., Punler, M.J., ...
The viscous disk of GRS 1915+105 (1998)
Belloni, T., Mendez, R.M., King, A.R., Klis, M. Van Der, Paradijs, J.A. Van
Thermal-viscous instabilities in the accretion disk of GRS 1915+105 (1998)
Belloni, T., Mendez, R.M., King, A.R., Klis, M. Van Der, Paradijs, J.A. Van
Thermal-viscous instabilitiees in the accretion disk of GRS 1915-105 (1998)
Belloni, T., Mendez, M., King, A.R., Klis, M. Van Der, Paradijs, J. Van
The viscous disk of GRS 1915-105 (1998)
Belloni, T., Mendez, M., King, A.R., Klis, M. Van Der, Paradijs, J. Van
A unified model for the spectral variability in GRS 1915+105 (1997)
Belloni, T., Mendez, R.M., King, A.R., Klis, M. Van Der, Paradijs, J.A. Van
An unstable central disk in the superluminal black-hole X-ray binary GRS 1915+105 (1997)
Belloni, T., Mendez, R.M., King, A.R., Klis, M. Van Der, Paradijs, J.A. Van
The IR variability of SS433 (1980)
A. B. Giles, A. R. King, R. F. Jameson, M. R. Sherrington, J. H. Hough, J. A. Bailey, ...
The IR variability of SS433. (1980)
Giles, A.B., King, A.R., Jameson, R.F., Sherrington, M.R., Hough, J., Bailey, J., ...
Original article can be found at: http://www.nature.com/nature/ Copyright Nature Publishing Group. DOI: 10.1038/286689a0 [Full text of this article is not available in the UHRA]
Hawking, S. W., King, A. R., McCarthy, P. J.
A new topology is proposed for strongly causal space–times. Unlike the standard manifold topology (which merely characterizes continuity properties), the new topology determines the causal,...
Diflunisal and its conjugates in patients with renal failure.
Dickinson, R G, Verbeeck, R K, King, A R, Restifo, A C, Pond, S M
Six patients with renal failure were given a single oral dose (250 mg) of diflunisal. In contrast to the acyl glucuronide, the phenolic glucuronide and sulphate conjugates showed the capacity to...
Dickinson, R G, King, A R, McKinnon, G E, Hooper, W D, Eadie, M J, Herkes, G K
1. In five healthy male volunteers given multiple doses of diflunisal (DF), renal clearances (CLR) of the acyl glucuronide (DAG), phenolic glucuronide (DPG) and sulphate (DS) conjugates were about...
King, A.R., Martin, I.L., Arabella Melville, K.
1 Small doses of lysergic acid diethylamide (LSD) (12.5-50 μg/kg) consistently facilitated learning of a brightness discrimination reversal.