Articles: Recent submissions

Now showing items 261-280 of 816

The role of feedback in shaping the structure of the interstellar medium

Walker, A. P.; Gibson, Brad K.; Pilkington, K.; Brook, C. B.; Dutta, P.; Stanimirovic, S.; Stinson, G. S.; Bailin, J. (Oxford University Press, 2014-06)

We present an analysis of the role of feedback in shaping the neutral hydrogen (H I) content of simulated disc galaxies. For our analysis, we have used two realizations of two separate Milky Way-like (∼L★) discs – ...
A stable quasi-periodic 4.18-d oscillation and mysterious occultations in the 2011 MOST light-curve of TW Hya

Siwak, Michal; Rucinski, Slavek M.; Matthews, Jaymie M.; Guenther, David B.; Kuschnig, Rainer; Moffat, Anthony F. J.; Rowe, Jason F.; Sasselov, Dimitar; Weiss, Werner W. (Oxford University Press, 2014-10-11)

We present an analysis of the 2011 photometric observations of TW Hya by the MOST satellite; this is the fourth continuous series of this type. The large-scale light variations are dominated by a strong, quasi-periodic ...
The [alpha/Fe] ratios of very metal-poor stars within the integrated galactic initial mass function theory

Recchi, S.; Calura, F.; Gibson, Brad K.; Kroupa, P. (Oxford University Press, 2014-01)

The aim of this paper is to quantify the amplitude of the predicted plateau in [α/Fe] ratios associated with the most metal-poor stars of a galaxy. We assume that the initial mass function (IMF) in galaxies is steeper ...
MOST detects corotating bright spots on the mid-O-type giant Xi Persei

Ramiaramanantsoa, Tahina; Moffat, Anthony F. J.; Chene, Andre-Nicolas; Richardson, Noel D.; Henrichs, Huib F.; Desforges, Sebastien; Antoci, Victoria; Rowe, Jason F.; Matthews, Jaymie M.; Kuschnig, Rainer; Guenther, David B. (Oxford University Press, 2014-06)

We have used the MOST (Microvariability and Oscillations of STars) microsatellite to obtain four weeks of contiguous high-precision broad-band visual photometry of the O7.5III(n)((f)) star ξ Persei in 2011 November . ...
The NuSTAR spectrum of Mrk 335: extreme relativistic effects within two gravitational radii of the event horizon

Parker, M. L.; Wilkins, D. R.; Fabian, A. C.; Grupe, D.; Dauser, T.; Matt, G.; Harrison, F. A.; Brenneman, L.; Boggs, S. E.; Christensen, F. E.; Gallo, Luigi C. (Oxford University Press, 2014-09-11)

We present 3–50 keV NuSTAR observations of the active galactic nuclei Mrk 335 in a very low flux state. The spectrum is dominated by very strong features at the energies of the iron line at 5–7 keV and Compton ...
The main sequence and the fundamental metallicity relation in MaGICC Galaxies: evolution and scatter

Obreja, A.; Brook, C. B.; Stinson, G.; Dominguez-Tenreiro, R.; Gibson, Brad K.; Silva, L.; Granato, G. L. (Oxford University Press, 2014-08-01)

Using cosmological galaxy simulations from the MaGICC project, we study the evolution of the stellar masses, star formation rates and gas-phase abundances of star-forming galaxies. We derive the stellar masses and star ...
MaGICC baryon cycle: the enrichment history of simulated disc galaxies

Brook, C. B.; Stinson, G.; Gibson, Brad K.; Shen, S.; Maccio, A. V.; Obreja, A.; Wadsley, J.; Quinn, T. (Oxford University Press, 2014-10-01)

Using cosmological galaxy formation simulations from the MaGICC (Making Galaxies in a Cosmological Context) project, spanning stellar mass from ∼10⁷ to 3 × 10¹⁰ M_☉, we trace the ...
Chemodynamics of a simulated disc galaxy: initial mass functions and Type Ia supernova progenitors

Few, C. G.; Courty, S.; Gibson, Brad K.; Michel-Dansac, L.; Calura, F. (Oxford University Press, 2014-11-11)

We trace the formation and advection of several elements within a cosmological adaptive mesh refinement simulation of an L_★ galaxy. We use nine realizations of the same initial conditions with different stellar ...
The environmental dependence of neutral hydrogen in the GIMIC simulations

Cunnama, D.; Andrianomena, S.; Cress, C. M.; Faltenbacher, A.; Gibson, Brad K.; Theuns, T. (Oxford University Press, 2014-01-10)

We use the Galaxies-Intergalactic Medium Interaction Calculation (GIMIC) cosmological hydrodynamic simulation at z = 0 to study the distribution and environmental dependence of neutral hydrogen (H I) gas in the outskirts ...
Modelling the broad Fe K alpha reverberation in the AGN NGC 4151

Cackett, E. M.; Zoghbi, A.; Reynolds, C.; Fabian, A. C.; Kara, E.; Uttley, P.; Wilkins, D. R. (Oxford University Press, 2014-01-13)

The recent detection of X-ray reverberation lags, especially in the Fe Kα line region, around active galactic nuclei (AGN) has opened up the possibility of studying the time-resolved response (reflection) of hard ...
An atlas of far-ultraviolet spectra of the Zeta Aurigae binary 31 Cygni with line identifications

Hagen Bauer, Wendy; Bennett, Philip Desmond, 1952- (IOP Publishing, 2014-04)

The ζ Aurigae system 31 Cygni (K4 Ib + B4 V) was observed by the FUSE satellite during total eclipse and at three phases during chromospheric eclipse. We present the coadded, calibrated spectra and atlases with line ...
Non-local thermodynamic equilibrium 1.5D modeling of red giant stars

Young, Mitchell E.; Short, C. Ian (Christopher Ian), 1965- (IOP Publishing, 2014-05-20)

Spectra for two-dimensional (2D) stars in the 1.5D approximation are created from synthetic spectra of one-dimensional (1D) non-local thermodynamic equilibrium (NLTE) spherical model atmospheres produced by the PHOENIX ...
Properties of 42 solar-type Kepler targets from the Asteroseismic Modeling Portal

Metcalfe, T. S.; Creevey, O. L.; Drogan, G.; Mathur, S.; Xu, H.; Bedding, T. R.; Chaplin, W. J.; Christensen-Dalsgaard, J.; Karoff, C.; Trampedach, R.; Gruberbauer, Michael; Guenther, David B. (The American Astronomical Society, 2014-10)

Recently the number of main-sequence and subgiant stars exhibiting solar-like oscillations that are resolved into individual mode frequencies has increased dramatically. While only a few such data sets were available for ...
The hard X-ray perspective on the soft X-ray excess

Vasudevan, Ranjan V.; Mushotzky, Richard F.; Reynolds, Christopher S.; Fabian, Andrew C.; Lohfink, Anne M.; Zoghbi, Abderahmen; Gallo, Luigi C.; Walton, Dominic (IOP Publishing Limited, 2014-04-10)

The X-ray spectra of many active galactic nuclei exhibit a “soft excess” below 1 keV, whose physical origin remains unclear. Diverse models have been suggested to account for it, including ionized reflection ...
The ASTRO-H X-ray astronomy satellite

Takahashi, Tadayuki; Mitsuda, Kazuhisa; Kelley, Richard; Aharonian, Felix; Akamatsu, Hiroki; Akimoto, Fumie; Allen, Steve; Anabuki, Naohisa; Angelini, Lorella; Arnaud, Keith; Gallo, Luigi C.; Wilkins, D. R. (Society of Photo Optical Instrumental Engineers, 2014-12-03)

The joint JAXA/NASA ASTRO-H mission is the sixth in a series of highly successful X-ray missions developed by the Institute of Space and Astronautical Science (ISAS), with a planned launch in 2015. The ASTRO-H mission is ...
Cloning and characterization of low-molecular-weight glutenin subunit alleles from Chinese wheat landraces (Triticum aestivum L.)

Si, Hongqi; Zhao, Manli; Zhang, Xin; Yao, Guoliang; Sun, Genlou; Ma, Chuanxi (Hindawi Publishing Corporation, 2014-04-10)

Low-molecular-weight glutenin subunits (LMW-GS) are of great importance in processing quality and participate in the formation of polymers in wheat. In this study, eight new LMW-GS alleles were isolated from Chinese wheat ...
Proton radius of [superscript 14]Be from measurement of charge-changing cross sections

Terashima, S.; Tanihata, I.; Kanungo, Rituparna; Estrade, Alfredo; Horiuchi, W.; Ameil, F.; Atkinson, J.; Ayyad, Y.; Cortina-Gil, D.; Dillmann, I. (Oxford University Press, 2014-10-06)

The charge-changing cross sections of ^7,9−12,14Be have been measured at 900A MeV on a carbon target. These cross sections are discussed both in terms of a geometrical and a Glauber model. From several ...
The mitochondrial genome of Paragyrodactylus variegatus (Platyhelminthes: Monogenea): differences in major non-coding region and gene order compared to Gyrodactylus

Ye, Fei; King, Stanley D.; Cone, David Knight; You, Ping (Biomed Central Limited, 2014-08-17)

Background: Paragyrodactylus Gvosdev and Martechov, 1953, a viviparous genus of ectoparasite within the Gyrodactylidae, contains three nominal species all of which infect Asian river loaches. The group is suspected to be ...
Contributions of charge-density research to medicinal chemistry

Dittrich, Birger; Matta, Cherif F. (International Union of Crystallography, 2014-11)

This article reviews efforts in accurate experimental charge-density studies with relevance to medicinal chemistry. Initially, classical charge-density studies that measure electron density distribution via least-squares ...
Study of the break-up channel in [superscript 11]Li+[superscript 208]Pb collisions at energies around the Coulomb barrier

Fernandez-Garcia, J. P.; Cubero, M.; Rodriguez-Gallardo, M.; Acosta, L.; Alcorta, M.; Alvarez, M. A. G.; Borge, M. J. G.; Buchmann, L.; Diget, C. A.; Falou, H. A.; Kanungo, Rituparna (IOP Publishing Limited, 2014)

We present a study of ¹¹Li+²⁰⁸Pb collisions at energies around the Coulomb barrier (E_lab = 24.3 and 29.8 MeV), measured at the post-accelerated beam facility, ISAC II, at TRIUMF ...

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