All Outputs (754)

Thermally induced magnetization switching in Gd/Fe multilayers (2016)
Journal Article
Xu, C., Ostler, T. A., & Chantrell, R. W. (2016). Thermally induced magnetization switching in Gd/Fe multilayers. Physical Review B, 93(5), Article 054302. https://doi.org/10.1103/PhysRevB.93.054302

A theoretical model of Gd/Fe multilayers is constructed using the atomistic spin dynamics formalism. By varying the thicknesses and number of layers we have shown that a strong dependence of the energy required for thermally induced magnetization swi... Read More about Thermally induced magnetization switching in Gd/Fe multilayers.

The imprint of satellite accretion on the chemical and dynamical properties of disc galaxies (2016)
Journal Article
Ruiz-Lara, T., Few, C. G., Gibson, B. K., Pérez, I., Florido, E., Minchev, I., & Sánchez-Blázquez, P. (2016). The imprint of satellite accretion on the chemical and dynamical properties of disc galaxies. Astronomy and Astrophysics, 586, A112. https://doi.org/10.1051/0004-6361/201526470

Aims. We study the effects of the cosmological assembly history on the chemical and dynamical properties of the discs of spiral galaxies as a function of radius. Methods. We made use of the simulated Milky Way mass, fully-cosmological discs from Rams... Read More about The imprint of satellite accretion on the chemical and dynamical properties of disc galaxies.

The discovery of lensed radio and x-ray sources behind the frontier fields cluster MACS J0717.5+3745 with the JVLA and Chandra (2016)
Journal Article
van Weeren, R. J., Ogrean, G. A., Jones, C., Forman, W. R., Andrade-Santos, F., Bonafede, A., Brüggen, M., Bulbul, E., Clarke, T. E., Churazov, E., David, L., Dawson, W. A., Donahue, M., Goulding, A., Kraft, R. P., Mason, B., Merten, J., Mroczkowski, T., Murray, S. S., Nulsen, P. E. J., …Zitrin, A. (2016). The discovery of lensed radio and x-ray sources behind the frontier fields cluster MACS J0717.5+3745 with the JVLA and Chandra. The Astrophysical journal, 817(2), Article ARTN 98. https://doi.org/10.3847/0004-637x/817/2/98

© 2016. The American Astronomical Society. All rights reserved.. We report on high-resolution JVLA and Chandra observations of the Hubble Space Telescope (HST) Frontier Cluster MACS J0717.5+3745. MACS J0717.5+3745 offers the largest contiguous magnif... Read More about The discovery of lensed radio and x-ray sources behind the frontier fields cluster MACS J0717.5+3745 with the JVLA and Chandra.

Phonon emission and arrival times of electrons from a single-electron source (2016)
Journal Article
Emary, C., Dyson, A., Ryu, S., Sim, H.-S., & Kataoka, M. (2016). Phonon emission and arrival times of electrons from a single-electron source. Physical Review B, 93(3), Article ARTN 035436. https://doi.org/10.1103/PhysRevB.93.035436

In recent charge-pump experiments, single electrons are injected into quantum Hall edge channels at energies significantly above the Fermi level. We consider here the relaxation of these hot edge-channel electrons through longitudinal-optical-phonon... Read More about Phonon emission and arrival times of electrons from a single-electron source.

Iron-group abundances in the metal-poor main-sequence turnoff star HD 84937 (2016)
Journal Article
Sneden, C., Cowan, J. J., Kobayashi, C., Pignatari, M., Lawler, J. E., Den Hartog, E. A., & Wood, M. P. (2016). Iron-group abundances in the metal-poor main-sequence turnoff star HD 84937. The Astrophysical journal, 817(1), 53. https://doi.org/10.3847/0004-637x/817/1/53

We have derived new, very accurate abundances of the Fe-group elements Sc through Zn (Z = 21−30) in the bright main-sequence turnoff star HD 84937 based on high-resolution spectra covering the visible and ultraviolet spectral regions. New or recent l... Read More about Iron-group abundances in the metal-poor main-sequence turnoff star HD 84937.

Weighing the galactic disc using the Jeans equation: lessons from simulations (2016)
Journal Article
Candlish, G. N., Smith, R., Moni Bidin, C., & Gibson, B. K. (2016). Weighing the galactic disc using the Jeans equation: lessons from simulations. Monthly notices of the Royal Astronomical Society, 456(4), 3456-3474. https://doi.org/10.1093/mnras/stv2792

Using three-dimensional stellar kinematic data from simulated galaxies, we examine the efficacy of a Jeans equation analysis in reconstructing the total disk surface density, including the dark matter, at the ‘Solar’ radius. Our simulation data set i... Read More about Weighing the galactic disc using the Jeans equation: lessons from simulations.

Origin of the p-process radionuclides ⁹²Nb and ¹⁴⁶Sm in the early solar system and inferences on the birth of the Sun (2016)
Journal Article
Lugaro, M., Pignatari, M., Ott, U., Zuber, K., Travaglio, C., Gyürky, G., & Fülöp, Z. (2016). Origin of the p-process radionuclides ⁹²Nb and ¹⁴⁶Sm in the early solar system and inferences on the birth of the Sun. Proceedings of the National Academy of Sciences of the United States of America, 113(4), 907-912. https://doi.org/10.1073/pnas.1519344113

The abundances of ⁹²Nb and ¹⁴⁶Sm in the early solar system are determined from meteoritic analysis, and their stellar production is attributed to the p process. We investigate if their origin from thermonuclear supernovae deriving from the explosion... Read More about Origin of the p-process radionuclides ⁹²Nb and ¹⁴⁶Sm in the early solar system and inferences on the birth of the Sun.

The history of stellar metallicity in a simulated disc galaxy (2016)
Journal Article
Snaith, O. N., Bailin, J., Gibson, B. K., Bell, E. F., Stinson, G., Valluri, M., Wadsley, J., & Couchman, H. (2016). The history of stellar metallicity in a simulated disc galaxy. Monthly notices of the Royal Astronomical Society, 456(3), 3119-3141. https://doi.org/10.1093/mnras/stv2788

We explore the chemical distribution of stars in a simulated galaxy. Using simulations of the same initial conditions but with two different feedback schemes (McMaster Unbiased Galaxy Simulations – MUGS – and Making Galaxies in a Cosmological Context... Read More about The history of stellar metallicity in a simulated disc galaxy.

Experiments with neutron beams for the astrophysical s process (2016)
Journal Article
Lederer, C., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., …Žugec, P. (2016). Experiments with neutron beams for the astrophysical s process. Journal of Physics: Conference Series, 665(1), 012020. https://doi.org/10.1088/1742-6596/665/1/012020

© Published under licence by IOP Publishing Ltd. Neutron capture cross sections are the key nuclear physics input to study the slow neutron capture process, which is responsible for forming about half of the elemental abundances above Fe. Stellar neu... Read More about Experiments with neutron beams for the astrophysical s process.

Sensitivity study for s process nucleosynthesis in AGB stars (2016)
Journal Article
Koloczek, A., Thomas, B., Glorius, J., Plag, R., Pignatari, M., Reifarth, R., Ritter, C., Schmidt, S., & Sonnabend, K. (2016). Sensitivity study for s process nucleosynthesis in AGB stars. Atomic Data and Nuclear Data Tables, 108(March), 1-14. https://doi.org/10.1016/j.adt.2015.12.001

In this paper we present a large-scale sensitivity study of reaction rates in the main component of the s process. The aim of this study is to identify all rates, which have a global effect on the s process abundance distribution and the three most i... Read More about Sensitivity study for s process nucleosynthesis in AGB stars.

Feedback control in quantum transport (2016)
Book Chapter
Emary, C. (2016). Feedback control in quantum transport. In Understanding Complex Systems; Control of Self-Organizing Nonlinear Systems (275-287). Control of Self-Organizing Nonlinear Systems: Springer International Publishing. https://doi.org/10.1007/978-3-319-28028-8_14

Quantum transport is the study of the motion of electrons through nano-scale structures small enough that quantum effects are important. In this contribution I review recent theoretical proposals to use the techniques of quantum feedback control to m... Read More about Feedback control in quantum transport.

Galactic archaeology and minimum spanning trees (2015)
Book Chapter
MacFarlane, B. A., Gibson, B. K., & Flynn, C. M. L. (2015). Galactic archaeology and minimum spanning trees. In I. Skillen, M. Balcells, & S. Trager (Eds.), Multi-Object Spectroscopy in the Next Decade: Big Questions, Large Surveys, and Wide Fields (79-83). Astronomical Society of the Pacific

Chemical tagging of stellar debris from disrupted open clusters and associations underpins the science cases for next-generation multi-object spectroscopic surveys. As part of the Galactic Archaeology project TraCD (Tracking Cluster Debris), a prelim... Read More about Galactic archaeology and minimum spanning trees.

s-process production in rotating massive stars at solar and low metallicities (2015)
Journal Article
Frischknecht, U., Hirschi, R., Pignatari, M., Maeder, A., Meynet, G., Chiappini, C., Thielemann, F.-K., Rauscher, T., Georgy, C., & Ekström, S. (2016). s-process production in rotating massive stars at solar and low metallicities. Monthly notices of the Royal Astronomical Society, 456(2), 1803-1825. https://doi.org/10.1093/mnras/stv2723

Rotation was shown to have a strong impact on the structure and light element nucleosynthesis in massive stars. In particular, models including rotation can reproduce the primary nitrogen observed in halo extremely metal poor (EMP) stars. Additional... Read More about s-process production in rotating massive stars at solar and low metallicities.

The z < 1.2 optical luminosity function from a sample of ∼410,000 galaxies in Boötes (2015)
Journal Article
Beare, R., Brown, M. J. I., Pimbblet, K., Bian, F., & Lin, Y.-T. (2015). The z < 1.2 optical luminosity function from a sample of ∼410,000 galaxies in Boötes. The Astrophysical journal, 815(2), https://doi.org/10.1088/0004-637x/815/2/94

Using a sample of ~410,000 galaxies to a depth of IAB=24 over 8.26 deg2 in the Boötes field (~10 times larger than the z~1 luminosity function (LF) studies in the prior literature), we have accurately measured the evolving B-band LF of red galaxies a... Read More about The z < 1.2 optical luminosity function from a sample of ∼410,000 galaxies in Boötes.

Modern yields per stellar generation: the effect of the IMF (2015)
Journal Article
Vincenzo, F., Matteucci, F., Belfiore, F., & Maiolino, R. (2016). Modern yields per stellar generation: the effect of the IMF. Monthly notices of the Royal Astronomical Society, 455(4), 4183–4190. https://doi.org/10.1093/mnras/stv2598

Gaseous and stellar metallicities in galaxies are nowadays routinely used to constrain the evolutionary processes in galaxies. This requires the knowledge of the average yield per stellar generation, $y_{\text{Z}}$, i.e. the quantity of metals that a... Read More about Modern yields per stellar generation: the effect of the IMF.

H ingestion into He-burning convection zones in super-AGB stellar models as a potential site for intermediate neutron-density nucleosynthesis (2015)
Journal Article
Jones, S., Ritter, C., Herwig, F., Fryer, C., Pignatari, M., Bertolli, M. G., & Paxton, B. (2016). H ingestion into He-burning convection zones in super-AGB stellar models as a potential site for intermediate neutron-density nucleosynthesis. Monthly notices of the Royal Astronomical Society, 455(4), 3848-3863. https://doi.org/10.1093/mnras/stv2488

We investigate the evolution of super-AGB (SAGB) thermal pulse (TP) stars for a range of metallicities (Z) and explore the effect of convective boundary mixing (CBM). With decreasing metallicity and evolution along the TP phase, the He-shell flash an... Read More about H ingestion into He-burning convection zones in super-AGB stellar models as a potential site for intermediate neutron-density nucleosynthesis.

Galaxy and mass assembly (GAMA): Panchromatic data release (far-UV-far-IR) and the low-z energy budget (2015)
Journal Article
Driver, S. P., Wright, A. H., Andrews, S. K., Davies, L. J., Kafle, P. R., Lange, R., Moffett, A. J., Mannering, E., Robotham, A. S. G., Vinsen, K., Alpaslan, M., Andrae, E., Baldry, I. K., Bauer, A. E., Bamford, S. P., Bland-Hawthorn, J., Bourne, N., Brough, S., Brown, M. J. I., Cluver, M. E., …Williams, R. (2016). Galaxy and mass assembly (GAMA): Panchromatic data release (far-UV-far-IR) and the low-z energy budget. Monthly notices of the Royal Astronomical Society, 455(4), 3911-3942. https://doi.org/10.1093/mnras/stv2505

We present the Galaxy And Mass Assembly (GAMA) Panchromatic Data Release (PDR) constituting over 230 deg2 of imaging with photometry in 21 bands extending from the far-UV to the far-IR. These data complement our spectroscopic campaign of over 300k ga... Read More about Galaxy and mass assembly (GAMA): Panchromatic data release (far-UV-far-IR) and the low-z energy budget.

Jellyfish: The origin and distribution of extreme ram-pressure stripping events in massive galaxy clusters (2015)
Journal Article
McPartland, C., Ebeling, H., Roediger, E., & Blumenthal, K. (2016). Jellyfish: The origin and distribution of extreme ram-pressure stripping events in massive galaxy clusters. Monthly notices of the Royal Astronomical Society, 455(3), 2994-3008. https://doi.org/10.1093/mnras/stv2508

We investigate the observational signatures and physical origin of ram-pressure stripping (RPS) in 63 massive galaxy clusters at z = 0.3–0.7, based on images obtained with the Hubble Space Telescope. Using a training set of a dozen ‘jellyfish’ galaxi... Read More about Jellyfish: The origin and distribution of extreme ram-pressure stripping events in massive galaxy clusters.

Feedback from massive stars and gas expulsion from proto-globular clusters (2015)
Journal Article
Calura, F., Few, C. G., Romano, D., & D'Ercole, A. (2015). Feedback from massive stars and gas expulsion from proto-globular clusters. Astrophysical journal. Letters, 814(1), Article ARTN L14. https://doi.org/10.1088/2041-8205/814/1/L14

© 2015. The American Astronomical Society. All rights reserved. Globular clusters (GCs) are considerably more complex structures than previously thought, harboring at least two stellar generations that present clearly distinct chemical abundances. Sc... Read More about Feedback from massive stars and gas expulsion from proto-globular clusters.

On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares (2015)
Journal Article
Zharkov, S., & Zharkova, V. (2015). On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares. Solar Physics, 290(11), 3163-3188. https://doi.org/10.1007/s11207-015-0813-x

Observations of solar flares with sunquakes by space- and ground-based instruments reveal essentially different dynamics of seismic events in different flares. Some sunquakes are found to be closely associated with the locations of hard X-ray (HXR) a... Read More about On the generation of hydrodynamic shocks by mixed beams and occurrence of sunquakes in flares.