All Outputs (756)

2D-Galactic chemical evolution: The role of the spiral density wave (2019)
Journal Article
Mollá, M., Wekesa, S., Cavichia, O., Díaz, I., Gibson, B. K., Rosales-Ortega, F. F., Ascasibar, Y., Wamalwa, D. S., & Sánchez, S. F. (2019). 2D-Galactic chemical evolution: The role of the spiral density wave. Monthly notices of the Royal Astronomical Society, 490(1), 665-682. https://doi.org/10.1093/mnras/stz2537

© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a 2D chemical evolution code applied to a Milky Way type Galaxy, incorporating the role of spiral arms in shaping azimuthal abundance v... Read More about 2D-Galactic chemical evolution: The role of the spiral density wave.

Heterogeneity of inverted calcium II H:K ratio cluster galaxies (2019)
Journal Article
Pimbblet, K. A., Crossett, J. P., & Fraser-McKelvie, A. (2019). Heterogeneity of inverted calcium II H:K ratio cluster galaxies. Monthly notices of the Royal Astronomical Society, 490(1), 455-466. https://doi.org/10.1093/mnras/stz2549

© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society The ratio of calcium II H plus H∊ to calcium II K inverts as a galaxy stellar population moves from being dominated by older stars to possessing mor... Read More about Heterogeneity of inverted calcium II H:K ratio cluster galaxies.

A direct measurement of the 17O(α,γ)21Ne reaction in inverse kinematics and its impact on heavy element production (2019)
Journal Article
Taggart, M. P., Akers, C., Laird, A. M., Hager, U., Ruiz, C., Hutcheon, D. A., Bentley, M. A., Brown, J. R., Buchmann, L., Chen, A. A., Chen, J., Chipps, K. A., Choplin, A., D'Auria, J. M., Davids, B., Davis, C., Diget, C. A., Erikson, L., Fallis, J., Fox, S. P., …Williams, M. (2019). A direct measurement of the 17O(α,γ)21Ne reaction in inverse kinematics and its impact on heavy element production. Physics letters. B, 798, Article 134894. https://doi.org/10.1016/j.physletb.2019.134894

© 2019 The Authors During the slow neutron capture process in massive stars, reactions on light elements can both produce and absorb neutrons thereby influencing the final heavy element abundances. At low metallicities, the high neutron capture rate... Read More about A direct measurement of the 17O(α,γ)21Ne reaction in inverse kinematics and its impact on heavy element production.

Redshift measurement through star formation (2019)
Journal Article
Lindholmer, M. O., & Pimbblet, K. A. (2019). Redshift measurement through star formation. Astronomy and Astrophysics, 629, Article A7. https://doi.org/10.1051/0004-6361/201833046

© ESO 2019. In this work we use the property that, on average, star formation rate increases with redshift for objects with the same mass - the so called galaxy main sequence - to measure the redshift of galaxy clusters. We use the fact that the gene... Read More about Redshift measurement through star formation.

Heavy Elements Nucleosynthesis on Accreting White Dwarfs Surface: Seeding the p-Process (2019)
Presentation / Conference Contribution
Battino, U., Travaglio, C., Pignatari, M., & Lederer-Woods, C. Heavy Elements Nucleosynthesis on Accreting White Dwarfs Surface: Seeding the p-Process. Presented at Nuclei in the Cosmos XV, Assergi, Italy

© 2019, Springer Nature Switzerland AG. The production of the proton-rich isotopes beyond iron that we observe today in the solar system is still uncertain. Thermonuclear supernovae (SNe Ia) exploding within the single-degenerate scenario have been p... Read More about Heavy Elements Nucleosynthesis on Accreting White Dwarfs Surface: Seeding the p-Process.

H-He Shell Interactions and Nucleosynthesis in Massive Population III Stars (2019)
Presentation / Conference Contribution
Clarkson, O., Herwig, F., Andrassy, R., Woodward, P., Pignatari, M., & Mao, H. H-He Shell Interactions and Nucleosynthesis in Massive Population III Stars. Presented at Nuclei in the Cosmos XV, Assergi, Italy

© 2019, Springer Nature Switzerland AG. We report on our ongoing investigation into the nucleosynthetic and hydrodynamic nature of mixing at the interface between the H- and He-convection zones in massive Pop III stars. Studying recent a grid of 26 1... Read More about H-He Shell Interactions and Nucleosynthesis in Massive Population III Stars.

NuGrid stellar data set - III. Updated low-mass AGB models and s-process nucleosynthesis with metallicities Z = 0.01, Z = 0.02, and Z = 0.03 (2019)
Journal Article
Battino, U., Tattersall, A., Lederer-Woods, C., Herwig, F., Denissenkov, P., Hirschi, R., Trappitsch, R., den Hartogh, J. W., & Pignatari, M. (2019). NuGrid stellar data set - III. Updated low-mass AGB models and s-process nucleosynthesis with metallicities Z = 0.01, Z = 0.02, and Z = 0.03. Monthly notices of the Royal Astronomical Society, 489(1), 1082-1098. https://doi.org/10.1093/mnras/stz2158

© 2019 Oxford University Press. All rights reserved. The production of the neutron-capture isotopes beyond iron that we observe today in the Solar system is the result of the combined contribution of the r-process, the s-process, and possibly the i-p... Read More about NuGrid stellar data set - III. Updated low-mass AGB models and s-process nucleosynthesis with metallicities Z = 0.01, Z = 0.02, and Z = 0.03.

Inhomogeneous Chemical Evolution of r-Process Elements in the Galactic Halo (2019)
Presentation / Conference Contribution
Wehmeyer, B., Fröhlich, C., Pignatari, M., & Thielemann, F. K. Inhomogeneous Chemical Evolution of r-Process Elements in the Galactic Halo. Presented at Nuclei in the Cosmos XV, Assergi, Italy

© 2019, Springer Nature Switzerland AG. The origin of the heaviest elements is still a matter of debate. For the rapid neutron capture process (“r-process”), multiple sites have been proposed, e.g., neutron star mergers and (sub-classes) of supernova... Read More about Inhomogeneous Chemical Evolution of r-Process Elements in the Galactic Halo.

Presolar SiC Grains of Type AB with Isotopically Light Nitrogen: Contributions from Supernovae? (2019)
Presentation / Conference Contribution
Hoppe, P., Pignatari, M., & Amari, S. Presolar SiC Grains of Type AB with Isotopically Light Nitrogen: Contributions from Supernovae?. Presented at Nuclei in the Cosmos XV, Assergi, Italy

Primitive solar system materials contain presolar grains that formed in the winds of evolved stars and in the ejecta of stellar explosions. Here, we report on NanoSIMS measurements of C-, N-, Al–Mg-, Si-, and S-isotopic compositions of 10 submicromet... Read More about Presolar SiC Grains of Type AB with Isotopically Light Nitrogen: Contributions from Supernovae?.

Star-Forming, Rotating Spheroidal Galaxies in the GAMA and SAMI Surveys (2019)
Journal Article
Moffett, A. J., Phillipps, S., Robotham, A. S. G., Driver, S. P., Bremer, M. N., Cortese, L., Wong, O. I., Brough, S., Brown, M. J. I., Bryant, J. J., Conselice, C. J., Croom, S. M., George, K., Goldstein, G., Goodwin, M., Holwerda, B. W., Hopkins, A. M., Konstantopoulos, I. S., Lawrence, J. S., Lorente, N. P. F., …Van De Sande, J. (2019). Star-Forming, Rotating Spheroidal Galaxies in the GAMA and SAMI Surveys. Monthly notices of the Royal Astronomical Society, 489(2), 2830–2843. https://doi.org/10.1093/mnras/stz2237

The Galaxy And Mass Assembly (GAMA) survey has morphologically identified a class of ‘Little Blue Spheroid’ (LBS) galaxies whose relationship to other classes of galaxies we now examine in detail. Considering a sample of 868 LBSs, we find that such g... Read More about Star-Forming, Rotating Spheroidal Galaxies in the GAMA and SAMI Surveys.

Long-term ambient air-stable cubic CsPbBr3 perovskite quantum dots using molecular bromine (2019)
Journal Article
Thapa, S., Bhardwaj, K., Basel, S., Pradhan, S., Eling, C. J., Adawi, A. M., Bouillard, J. S. G., Stasiuk, G. J., Reiss, P., Pariyar, A., & Tamang, S. (2019). Long-term ambient air-stable cubic CsPbBr3 perovskite quantum dots using molecular bromine. Nanoscale advances, 1(9), 3388-3391. https://doi.org/10.1039/c9na00486f

We report unprecedented phase stability of cubic CsPbBr3 quantum dots in ambient air obtained by using Br2 as halide precursor. Mechanistic investigation reveals the decisive role of temperature-controlled in situ generated, oleylammonium halide spec... Read More about Long-term ambient air-stable cubic CsPbBr3 perovskite quantum dots using molecular bromine.

The chromospheric response to the sunquake generated by the X9.3 flare of NOAA 12673 (2019)
Journal Article
Quinn, S., Reid, A., Mathioudakis, M., Nelson, C., Prasad, S. K., & Zharkov, S. (2019). The chromospheric response to the sunquake generated by the X9.3 flare of NOAA 12673. The Astrophysical journal, 881(1), Article 82. https://doi.org/10.3847/1538-4357/ab2c9e

Active region NOAA 12673 was extremely volatile in 2017 September, producing many solar flares, including the largest of solar cycle 24, an X9.3 flare of 2017 September 06. It has been reported that this flare produced a number of sunquakes along the... Read More about The chromospheric response to the sunquake generated by the X9.3 flare of NOAA 12673.

The frequency of dust lanes in edge-on spiral galaxies identified by galaxy Zoo in KiDS Imaging of GAMA Targets (2019)
Journal Article
Holwerda, B. W., Kelvin, L., Baldry, I., Lintott, C., Alpaslan, M., Pimbblet, K. A., Liske, J., Kitching, T., Bamford, S., De Jong, J., Bilicki, M., Hopkins, A., Bridge, J., Steele, R., Jacques, A., Goswami, S., Kusmic, S., Roemer, W., Kruk, S., Popescu, C. C., …Kitching, T. (2019). The frequency of dust lanes in edge-on spiral galaxies identified by galaxy Zoo in KiDS Imaging of GAMA Targets. Astronomical Journal, 158(3), Article 103. https://doi.org/10.3847/1538-3881/ab2886

Dust lanes bisect the plane of a typical edge-on spiral galaxy as a dark optical absorption feature. Their appearance is linked to the gravitational stability of spiral disks; the fraction of edge-on galaxies that displays a dust lane is a direct ind... Read More about The frequency of dust lanes in edge-on spiral galaxies identified by galaxy Zoo in KiDS Imaging of GAMA Targets.

Dynamic electric field alignment of metal-organic framework micro- rods (2019)
Journal Article
Cheng, F., Young, A. J., Bouillard, J.-S. G., Kemp, N. T., Guillet-Nicolas, R., Hall, C. H., Roberts, D., Jaafar, A. H., Adawi, A. M., Kleitz, F., Imhof, A., Reithofer, M.-C. R., & Chin, J. M. (2019). Dynamic electric field alignment of metal-organic framework micro- rods. Journal of the American Chemical Society, 141(33), 12989-12993. https://doi.org/10.1021/jacs.9b06320

Alignment of Metal Organic Framework (MOF) crystals has previously been performed via careful control of oriented MOF growth on substrates, as well as by dynamic magnetic alignment. We show here that microrod crystals of the MOF NU-1000 can also be d... Read More about Dynamic electric field alignment of metal-organic framework micro- rods.

Zoom-in cosmological hydrodynamical simulation of a star-forming barred, spiral galaxy at redshift z=2 (2019)
Journal Article
Vincenzo, F., Kobayashi, C., & Yuan, T. (2019). Zoom-in cosmological hydrodynamical simulation of a star-forming barred, spiral galaxy at redshift z=2. Monthly notices of the Royal Astronomical Society, 488(4), 4674–4689. https://doi.org/10.1093/mnras/stz2065

We present gas and stellar kinematics of a high-resolution zoom-in cosmological chemodynamical simulation, which fortuitously captures the formation and evolution of a star-forming barred spiral galaxy, from redshift $z\sim3$ to $z\sim2$ at the peak... Read More about Zoom-in cosmological hydrodynamical simulation of a star-forming barred, spiral galaxy at redshift z=2.

ASKAP commissioning observations of the GAMA 23 field (2019)
Journal Article
Leahy, D. A., Hopkins, A. M., Norris, R. P., Marvil, J., Collier, J. D., Taylor, E. N., Allison, J. R., Anderson, C., Bell, M., Bilicki, M., Bland-Hawthorn, J., Brough, S., Brown, M. J., Driver, S., Gurkan, G., Harvey-Smith, L., Heywood, I., Holwerda, B. W., Liske, J., Lopez-Sanchez, A. R., …Wang, L. (2019). ASKAP commissioning observations of the GAMA 23 field. Publications / Astronomical Society of Australia, 36, Article e024. https://doi.org/10.1017/pasa.2019.16

© Astronomical Society of Australia 2019. We have observed the G23 field of the Galaxy AndMass Assembly (GAMA) survey using the Australian Square Kilometre Array Pathfinder (ASKAP) in its commissioning phase to validate the performance of the telesco... Read More about ASKAP commissioning observations of the GAMA 23 field.

The i-process yields of rapidly accreting white dwarfs from multicycle He-shell flash stellar evolution models with mixing parametrizations from 3D hydrodynamics simulations (2019)
Journal Article
Denissenkov, P. A., Herwig, F., Woodward, P., Andrassy, R., Pignatari, M., & Jones, S. (2019). The i-process yields of rapidly accreting white dwarfs from multicycle He-shell flash stellar evolution models with mixing parametrizations from 3D hydrodynamics simulations. Monthly notices of the Royal Astronomical Society, 488(3), 4258-4270. https://doi.org/10.1093/mnras/stz1921

© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society We have modelled the multicycle evolution of rapidly accreting CO white dwarfs (RAWDs) with stable H burning intermittent with strong He-shell flash... Read More about The i-process yields of rapidly accreting white dwarfs from multicycle He-shell flash stellar evolution models with mixing parametrizations from 3D hydrodynamics simulations.

The effect of pressure on hydrogen solubility in Zircaloy-4 (2019)
Journal Article
Weekes, H. E., Dye, D., Proctor, J. E., Smith, D., Simionescu, C., Prior, T. J., & Wenman, M. R. (2019). The effect of pressure on hydrogen solubility in Zircaloy-4. Journal of Nuclear Materials, 524, 256-262. https://doi.org/10.1016/j.jnucmat.2019.07.012

The effect of pressure on the room temperature solubility of hydrogen in Zircaloy-4 was examined using synchrotron X-ray diffraction on small ground flake samples in a diamond anvil cell at pressures up to 20.9 GPa. Different combinations of hydrogen... Read More about The effect of pressure on hydrogen solubility in Zircaloy-4.

Wavelength dependent light tunable resistive switching graphene oxide nonvolatile memory devices (2019)
Journal Article
Jaafar, A. H., & Kemp, N. T. (2019). Wavelength dependent light tunable resistive switching graphene oxide nonvolatile memory devices. Carbon, 153, 81-88. https://doi.org/10.1016/j.carbon.2019.07.007

This paper reports on the first optically tunable graphene oxide memristor device. Modulation of resistive switching memory by light opens the route to new optoelectronic devices that can be switched optically and read electronically. Applications in... Read More about Wavelength dependent light tunable resistive switching graphene oxide nonvolatile memory devices.

Ballistic Spin Transport (2019)
Book Chapter
Doudin, B., & Kemp, N. (2019). Ballistic Spin Transport. In E. Y. Tsymbal, & I. Žutić (Eds.), Spintronics Handbook: Spin Transport and Magnetism, vol.3. (2nd. edition). CRC Press. https://doi.org/10.1201/9780429441189

This chapter presents the study of ballistic transport in magnetic nanostructures. Ballistic means that the charges carrying the electrical current go through the sample without experiencing scattering. Ballistic transport is a topic of increasing im... Read More about Ballistic Spin Transport.