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Wavelength dependent light tunable resistive switching graphene oxide nonvolatile memory devices (2019)
Journal Article
Jaafar, A. H., & Kemp, N. (in press). Wavelength dependent light tunable resistive switching graphene oxide nonvolatile memory devices. Carbon, 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

Galactic chemical evolution of radioactive isotopes (2019)
Journal Article
Côté, B., Lugaro, M., Reifarth, R., Pignatari, M., Világos, B., Yagüe, A., & Gibson, B. K. (2019). Galactic chemical evolution of radioactive isotopes. The Astrophysical journal, 878(2), https://doi.org/10.3847/1538-4357/ab21d1

The presence of short-lived (∼ Myr) radioactive isotopes in meteoritic inclusions at the time of their formation represents a unique opportunity to study the circumstances that led to the formation of the Solar System. To interpret these observations... Read More

The effect of minor and major mergers on the evolution of low excitation radio galaxies (2019)
Journal Article
Gordon, Y. A., Pimbblet, K. A., Kaviraj, S., Owers, M. S., O'Dea, C. P., Walmsley, M., …Pierce, J. C. . S. (2019). The effect of minor and major mergers on the evolution of low excitation radio galaxies. The Astrophysical journal, 878, https://doi.org/10.3847/1538-4357/ab203f

We use deep, μ r lesssim 28 mag arcsec−2, r-band imaging from the Dark Energy Camera Legacy Survey to search for past, or ongoing, merger activity in a sample of 282 low-excitation radio galaxies (LERGs) at z < 0.07. Our principal aim is to assess t... Read More

Extended X-ray study of M49: The frontier of the Virgo cluster (2019)
Journal Article
Su, Y., Kraft, R. P., Nulsen, P. E. J., Jones, C., Maccarone, T. J., Mernier, F., …Churazov, E. (2019). Extended X-ray study of M49: The frontier of the Virgo cluster. The Astronomical journal, 158(1), https://doi.org/10.3847/1538-3881/ab1d51

The M49 group, residing outside the virial radius of the Virgo cluster, is falling onto the cluster from the south. We report results from deep XMM-Newton mosaic observations of M49. Its hot gas temperature is 0.8 keV at the group center and rises to... Read More

Percolation threshold enables optical resistive‐memory switching and light‐tuneable synaptic learning in segregated nanocomposites (2019)
Journal Article
Jaafar, A. H., O'Neill, M., Kelly, S. M., Verrelli, E., & Kemp, N. T. (2019). Percolation threshold enables optical resistive‐memory switching and light‐tuneable synaptic learning in segregated nanocomposites. Advanced Electronic Materials, https://doi.org/10.1002/aelm.201900197

An optical memristor where the electrical resistance memory depends on the history of both the current flowing through the device and the irradiance of incident light onto it is demonstrated. It is based on a nanocomposite consisting of functionalize... Read More

Using failed supernovae to constrain the Galactic r-process element production (2019)
Journal Article
Wehmeyer, B., Fröhlich, C., Côté, B., Pignatari, M., & Thielemann, F. (2019). Using failed supernovae to constrain the Galactic r-process element production. Monthly notices of the Royal Astronomical Society, 487(2), 1745-1753. https://doi.org/10.1093/mnras/stz1310

Rapid neutron capture process (r-process) elements have been detected in a large fraction of metal-poor halo stars, with abundances relative to iron (Fe) that vary by over two orders of magnitude. This scatter is reduced to less than a factor of 3 in... Read More

ASKAP commissioning observations of the GAMA 23 field (2019)
Journal Article
Leahy, D. A., Hopkins, A., Norris, R., Marvil, J., Collier, J., Taylor, E., …Wang, L. (in press). ASKAP commissioning observations of the GAMA 23 field. Publications of the Astronomical Society of Australia,

Probing the molecular orientation of a single conjugated polymer via nano-gap SERS (2019)
Journal Article
Marshall, A. R. L., Roberts, M., Gierschner, J., Bouillard, J. G., & Adawi, A. M. (in press). Probing the molecular orientation of a single conjugated polymer via nano-gap SERS. ACS applied polymer materials, https://doi.org/10.1021/acsapm.9b00180

Determining the molecular orientation at the single molecule level is of key importance for a wide range of applica-tions ranging from molecular electronic devices to biomedical applications. In this work Surface-Enhanced Raman Scattering (SERS) was... Read More

Neutron star mergers might not be the only source of r-process elements in the Milky Way (2019)
Journal Article
Côté, B., Eichler, M., Arcones, A., Hansen, C. J., Simonetti, P., Frebel, A., …Matteucci, F. (2019). Neutron star mergers might not be the only source of r-process elements in the Milky Way. The Astrophysical journal, 875(2), 106. https://doi.org/10.3847/1538-4357/ab10db

Probing the origin of r-process elements in the universe represents a multidisciplinary challenge. We review the observational evidence that probes the properties of r-process sites, and address them using galactic chemical evolution simulations, bin... Read More

H2, HD, and D2 in the small cage of structure II clathrate hydrate: vibrational frequency shifts from fully coupled quantum six-dimensional calculations of the vibration-translation-rotation eigenstates (2019)
Journal Article
Lauvergnat, D., Felker, P., Scribano, Y., Benoit, D. M., & Bačić, Z. (2019). H2, HD, and D2 in the small cage of structure II clathrate hydrate: vibrational frequency shifts from fully coupled quantum six-dimensional calculations of the vibration-translation-rotation eigenstates. The Journal of chemical physics, 150(15), https://doi.org/10.1063/1.5090573

We report the first fully coupled quantum six-dimensional (6D) bound-state calculations of the vibration-translation-rotation eigenstates of a flexible H2, HD, and D2 molecule confined inside the small cage of the structure II clathrate hydrate embed... Read More

The R-Process alliance: Discovery of a Low-α, r-process-enhanced Metal-poor Star in the Galactic Halo (2019)
Journal Article
Sakari, C. M., Roederer, I. U., Placco, V. M., Beers, T. C., Ezzeddine, R., Frebel, A., …Watson, F. (2019). The R-Process alliance: Discovery of a Low-α, r-process-enhanced Metal-poor Star in the Galactic Halo. The Astrophysical journal, 874(2), 148. https://doi.org/10.3847/1538-4357/ab0c02

A new moderately r-process-enhanced metal-poor star, RAVE J093730.5−062655, has been identified in the Milky Way halo as part of an ongoing survey by the R-Process Alliance. The temperature and surface gravity indicate that J0937−0626 is likely a hor... Read More

A new class of x-ray tails of early-type galaxies and subclusters in galaxy clusters: Slingshot tails versus ram pressure stripped tails (2019)
Journal Article
Sheardown, A., Fish, T. M., Roediger, E., Hunt, M., ZuHone, J., Su, Y., …De Grandi, S. (2019). A new class of x-ray tails of early-type galaxies and subclusters in galaxy clusters: Slingshot tails versus ram pressure stripped tails. The Astrophysical journal, 874(2), 112. https://doi.org/10.3847/1538-4357/ab0c06

We show that there is a new class of gas tails—slingshot tails—that form as a subhalo (i.e., a subcluster or early-type cluster galaxy) moves away from the cluster center toward the apocenter of its orbit. These tails can point perpendicular or even... Read More

Evolution of the stellar mass function and infrared luminosity function of galaxies since z = 1.2 (2019)
Journal Article
Beare, R., Brown, M. J., Pimbblet, K., & Taylor, E. N. (2019). Evolution of the stellar mass function and infrared luminosity function of galaxies since z = 1.2. The Astrophysical journal, 873(1), https://doi.org/10.3847/1538-4357/ab041a

© 2019. The American Astronomical Society. All rights reserved. We measured evolution of the K-band luminosity function and stellar mass function (SMF) for red and blue galaxies at z < 1.2 using a sample of 353 594 I < 24 galaxies in 8.26 square degr... Read More

Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster – a post-merger scenario (2019)
Journal Article
Lyskova, N., Churazov, E., Zhang, C., Forman, W., Jones, C., Dolag, K., …Sheardown, A. (2019). Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster – a post-merger scenario. Monthly notices of the Royal Astronomical Society, 485(2), 2922-2934. https://doi.org/10.1093/mnras/stz597

We study a merger of the NGC 4839 group with the Coma cluster using X-ray observations from the XMM–Newton and Chandra telescopes. X-ray data show two prominent features: (i) a long (∼600 kpc in projection) and bent tail of cool gas trailing (towards... Read More

Constraining gas motions in the intra-cluster medium (2019)
Journal Article
Simionescu, A., ZuHone, J., Zhuravleva, I., Churazov, E., Gaspari, M., Nagai, D., …Paerels, F. (2019). Constraining gas motions in the intra-cluster medium. Space Science Reviews, 215, https://doi.org/10.1007/s11214-019-0590-1

The detailed velocity structure of the diffuse X-ray emitting intra-cluster medium (ICM) remains one of the last missing key ingredients in understanding the microphysical properties of these hot baryons and constraining our models of the growth and... Read More

Catching element formation in the act (2019)
Other
Fryer, C. L., Timmes, F., Hungerford, A. L., Couture, A., Adams, F., Aoki, W., …Pignatari, M. (2019). Catching element formation in the act

Gamma-ray astronomy explores the most energetic photons in nature to address some of the most pressing puzzles in contemporary astrophysics. It encompasses a wide range of objects and phenomena: stars, supernovae, novae, neutron stars, stellar-mass b... Read More

Enrichment of the Galactic disc with neutron capture elements: Sr (2019)
Journal Article
Mishenina, T., Pignatari, M., Gorbaneva, T., Bisterzo, S., Travaglio, C., Thielemann, F. K., & Soubiran, C. (2019). Enrichment of the Galactic disc with neutron capture elements: Sr. Monthly notices of the Royal Astronomical Society, 484(3), 3846-3864. https://doi.org/10.1093/mnras/stz178

The enrichment history of heavy neutron-capture elements in the Milky Way disc provides fundamental information about the chemical evolution of our Galaxy and about the stellar sources that made those elements. In this work we give new observational... Read More

Nucleosynthetic yields from neutron stars accreting in binary common envelopes (2019)
Journal Article
Keegans, J. D., Fryer, C. L., Jones, S. W., Côté, B., Belczynski, K., Herwig, F., …Diget, C. A. (2019). Nucleosynthetic yields from neutron stars accreting in binary common envelopes. Monthly notices of the Royal Astronomical Society, 485(1), 620-639. https://doi.org/10.1093/mnras/stz368

Massive-star binaries can undergo a phase where one of the two stars expands during its advanced evolutionary stage as a giant and envelops its companion, ejecting the hydrogen envelope and tightening its orbit. Such a common envelope phase is requir... Read More

Variability and proper motion of x-ray knots in the jet of Centaurus A (2019)
Journal Article
Snios, B., Wykes, S., Nulsen, P. E. . J., Kraft, R. P., Meyer, E. T., Birkinshaw, M., …Jones, C. (2019). Variability and proper motion of x-ray knots in the jet of Centaurus A. The Astrophysical journal, 871(2), doi:10.3847/1538-4357/aafaf3

We report results from Chandra observations analyzed for evidence of variability and proper motion in the X-ray jet of Centaurus A. Using data spanning 15 years, collective proper motion of 11.3±3.3 mas yr−1, or 0.68±0.20c, is detected for the fainte... Read More

Spectacular Hubble Space Telescope observations of the Coma Galaxy D100 and Star Formation in Its Ram Pressure–stripped Tail (2019)
Journal Article
Cramer, W. J., Kenney, J. D. P., Sun, M., Crowl, H., Yagi, M., Jáchym, P., …Waldron, W. (2019). Spectacular Hubble Space Telescope observations of the Coma Galaxy D100 and Star Formation in Its Ram Pressure–stripped Tail. The Astrophysical journal, 870(2), 63. doi:10.3847/1538-4357/aaefff

We present new HST F275W, F475W, and F814W imaging of the region of the Coma cluster around D100, a spiral galaxy with a remarkably long and narrow (60 × 1.5 kpc) ram pressure–stripped gas tail. We find blue sources coincident with the Hα tail, which... Read More