Hot subdwarf binaries from the MUCHFUSS project - Analysis of 12 new systems and a study of the short-period binary population (2015)
Journal Article
Kupfer, T., Geier, S., Heber, U., Østensen, R., Barlow, B., Maxted, P., …Gänsicke, B. (2015). Hot subdwarf binaries from the MUCHFUSS project - Analysis of 12 new systems and a study of the short-period binary population. Astronomy & Astrophysics, A44 -?. https://doi.org/10.1051/0004-6361/201425213

The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars with massive compact companions like massive white dwarfs (M>1.0 M$_\odot$), neutron stars, or stellar-mass black holes. We... Read More about Hot subdwarf binaries from the MUCHFUSS project - Analysis of 12 new systems and a study of the short-period binary population.

Multiwaveband photometry of the irradiated brown dwarf WD0137-349B (2015)
Journal Article
Casewell, S., Lawrie, K., Maxted, P., Marley, M., Fortney, J., Rimmer, P., …Helling, C. (2015). Multiwaveband photometry of the irradiated brown dwarf WD0137-349B. Monthly Notices of the Royal Astronomical Society, 447(4), 3218 -3226. https://doi.org/10.1093/mnras/stu2721

WD0137-349 is a white dwarf–brown dwarf binary system in a 116 min orbit. We present radial velocity observations and multiwaveband photometry from V, R and I in the optical, to J, H and Ks in the near-IR and [3.6], [4.5], [5.8] and [8.0] µm in the m... Read More about Multiwaveband photometry of the irradiated brown dwarf WD0137-349B.

The final fate of stars that ignite neon and oxygen off-center: electron capture or iron core-collapse supernova? (2014)
Journal Article
Jones, S., Hirschi, R., & Nomoto, K. (2014). The final fate of stars that ignite neon and oxygen off-center: electron capture or iron core-collapse supernova?. Astrophysical Journal, 797(2), 83. https://doi.org/10.1088/0004-637X/797/2/83

In the ONeMg cores of $8.8-9.5~{\rm M}_\odot$ stars, neon and oxygen burning is ignited off-center. Whether the neon-oxygen flame propagates to the center is critical to determine whether these stars undergo Fe core collapse or electron capture induc... Read More about The final fate of stars that ignite neon and oxygen off-center: electron capture or iron core-collapse supernova?.

WASP-94 A and B planets: hot-Jupiter cousins in a twin-star system (2014)
Journal Article
Neveu-VanMalle, M., Queloz, D., Anderson, D., Charbonnel, C., Collier Cameron, A., Delrez, L., …West, R. (2014). WASP-94 A and B planets: hot-Jupiter cousins in a twin-star system. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201424744

We report the discovery of two hot-Jupiter planets, each orbiting one of the stars of a wide binary system. WASP-94A (2MASS 20550794–3408079) is an F8 type star hosting a transiting planet with a radius of 1.72 ± 0.06 RJup, a mass of 0.452 ± 0.034 MJ... Read More about WASP-94 A and B planets: hot-Jupiter cousins in a twin-star system.

Room Temperature Electroluminescence from Mechanically Formed van der Waals III-VI Homojunctions and Heterojunctions (2014)
Journal Article
Balakrishnan, N., Kudrynskyi, Z., Fay, M., Mudd, G., Svatek, S., Makarovsky, O., …Patanè, A. (2014). Room Temperature Electroluminescence from Mechanically Formed van der Waals III-VI Homojunctions and Heterojunctions. Advanced optical materials, 1064 - 1069. https://doi.org/10.1002/adom.201400202

Room temperature electroluminescence from semiconductor junctions is demonstrated. The junctions are fabricated by the exfoliation and direct mechanical adhesion of InSe and GaSe van der Waals layered crystals. Homojunction diodes formed from layers... Read More about Room Temperature Electroluminescence from Mechanically Formed van der Waals III-VI Homojunctions and Heterojunctions.

Pair-instability supernovae in the local universe (2014)
Journal Article
Whalen, D. J., Smidt, J., Heger, A., Hirschi, R., Yusof, N., Even, W., …Joggerst, C. C. (2014). Pair-instability supernovae in the local universe. Astrophysical Journal, 797(1), Article 9. https://doi.org/10.1088/0004-637X/797/1/9

The discovery of 150-300 M ? stars in the Local Group and pair-instability supernova candidates at low redshifts has excited interest in this exotic explosion mechanism. Realistic light curves for pair-instability supernovae at near-solar metalliciti... Read More about Pair-instability supernovae in the local universe.

Optoelectronic properties ofTa3N5: A joint theoretical and experimental study (2014)
Journal Article
Morbec, J. M., Narkeviciute, I., Jaramillo, T. F., & Galli, G. (2014). Optoelectronic properties ofTa3N5: A joint theoretical and experimental study. Physical review B: Condensed matter and materials physics, https://doi.org/10.1103/PhysRevB.90.155204

A joint theoretical and experimental study of the optoelectronic properties of Ta3N5 was conducted by means of ab initio calculations and ellipsometry measurements. Previous experimental work on Ta3N5 has not been conclusive regarding the direct or i... Read More about Optoelectronic properties ofTa3N5: A joint theoretical and experimental study.

Variable emission from a gaseous disc around a metal-polluted white dwarf (2014)
Journal Article
Wilson, D., Gänsicke, B., Koester, D., Raddi, R., Breedt, E., Southworth, J., & Parsons, S. (2014). Variable emission from a gaseous disc around a metal-polluted white dwarf. Monthly Notices of the Royal Astronomical Society, 445(2), 1878 -1884. https://doi.org/10.1093/mnras/stu1876

We present the discovery of strongly variable emission lines from a gaseous disc around the DA white dwarf SDSS J1617+1620, a star previously found to have an infrared excess indicative of a dusty debris disc formed by the tidal disruption of a rocky... Read More about Variable emission from a gaseous disc around a metal-polluted white dwarf.

The s-process enrichment of the globular clusters M4 and M22 (2014)
Journal Article
Hirschi. (2014). The s-process enrichment of the globular clusters M4 and M22. Astrophysical Journal, https://doi.org/10.1088/0004-637X/795/1/34

We investigate the enrichment in elements produced by the slow neutron-capture process (s-process) in the globular clusters M4 (NGC 6121) and M22 (NGC 6656). Stars in M4 have homogeneous abundances of Fe and neutron-capture elements, but the entire c... Read More about The s-process enrichment of the globular clusters M4 and M22.

KIC 10526294: a slowly rotating B star with rotationally split, quasi-equally spaced gravity modes (2014)
Journal Article
Pápics, P., Moravveji, E., Aerts, C., Tkachenko, A., Triana, S., Bloemen, S., & Southworth, J. (2014). KIC 10526294: a slowly rotating B star with rotationally split, quasi-equally spaced gravity modes. Astronomy & Astrophysics, 570, Article A8. https://doi.org/10.1051/0004-6361/201424094

Context. Massive stars are important for the chemical enrichment of the universe. Since internal mixing processes influence their lives, it is very important to place constraints on the corresponding physical parameters, such as core overshooting and... Read More about KIC 10526294: a slowly rotating B star with rotationally split, quasi-equally spaced gravity modes.

Observational Studies of Transiting Extrasolar Planets (2014)
Conference Proceeding
Southworth, J. (2014). Observational Studies of Transiting Extrasolar Planets. In Living Together: planets, host stars and binaries (321 -336)

The study of transiting extrasolar planets is only 15 years old, but has matured into a rich area of research. I review the observational aspects of this work, concentrating on the discovery of transits, the characterization of planets from photometr... Read More about Observational Studies of Transiting Extrasolar Planets.

High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 and WASP-26 (2014)
Journal Article
Southworth, J., Hinse, T., Burgdorf, M., Calchi Novati, S., Dominik, M., Galianni, P., …Vilela, C. (2014). High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 and WASP-26. Monthly Notices of the Royal Astronomical Society, 444(1), 776 -789. https://doi.org/10.1093/mnras/stu1492

We present time series photometric observations of 13 transits in the planetary systems WASP-24, WASP-25 and WASP-26. All three systems have orbital obliquity measurements, WASP-24 and WASP-26 have been observed with Spitzer, and WASP-25 was previous... Read More about High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 and WASP-26.

HD 183648: a Kepler eclipsing binary with anomalous ellipsoidal variations and a pulsating component (2014)
Journal Article
Borkovits, T., Derekas, A., Fuller, J., Szabó, G., Pavlovski, K., Csák, B., …Jankovics, I. (2014). HD 183648: a Kepler eclipsing binary with anomalous ellipsoidal variations and a pulsating component. Monthly Notices of the Royal Astronomical Society, 443(4), 3068 - 3081. https://doi.org/10.1093/mnras/stu1379

KIC 8560861 (HD 183648) is a marginally eccentric (e = 0.05) eclipsing binary with an orbital period of Porb = 31.973 d, exhibiting mmag amplitude pulsations on time-scales of a few days. We present the results of the complex analysis of high- and me... Read More about HD 183648: a Kepler eclipsing binary with anomalous ellipsoidal variations and a pulsating component.

KIC 7582608: a new Kepler roAp star with frequency variability (2014)
Presentation / Conference
Holdsworth, D., Smalley, B., Kurtz, D., Southworth, J., Cunha, M., & Clubb, K. (2014, July). KIC 7582608: a new Kepler roAp star with frequency variability. Poster presented at The Space Photometry Revolution – CoRoT Symposium 3, Kepler KASC-7 Joint Meeting, Toulouse, France

We analyse the fifth roAp star reported in the Kepler field, KIC 7582608, discovered with the SuperWASP project. The object shows a high frequency pulsation at 181.7324d-1 (P = 7.9 min) with an amplitude of 1.45 mmag, and low frequency rotational mod... Read More about KIC 7582608: a new Kepler roAp star with frequency variability.

Tunable spectral response by hydrogen irradiation of Ga(AsN) superlattice diodes (2014)
Journal Article
Patanè, A., Hopkinson, M., Makarovsky, O., Balakrishnan, N., & Pettinari, G. (2014). Tunable spectral response by hydrogen irradiation of Ga(AsN) superlattice diodes. Applied Physics Letters, 242110 - 242110. https://doi.org/10.1063/1.4884425

We report on the tuning of the spectral response of superlattice (SL) diodes based on dilute nitride Ga(AsN) alloys by post-growth hydrogenation. Hydrogen is incorporated into the superlattice where it neutralizes the electronic activity of nitrogen... Read More about Tunable spectral response by hydrogen irradiation of Ga(AsN) superlattice diodes.

A micrometer-size movable light emitting area in a resonant tunneling light emitting diode (2013)
Journal Article
Pettinari, G., Balakrishnan, N., Makarovsky, O., Campion, R., Polimeni, A., Capizzi, M., & Patanè, A. (2013). A micrometer-size movable light emitting area in a resonant tunneling light emitting diode. Applied Physics Letters, 241105 - 241105. https://doi.org/10.1063/1.4844975

We report on the fabrication of a micrometer-size movable light emitting area in a GaAs/AlAs quantum well resonant tunneling p-i-n diode. The spatial position of the micrometer-size light emitting area shifts linearly with increasing applied bias, up... Read More about A micrometer-size movable light emitting area in a resonant tunneling light emitting diode.

Grids of stellar models with rotation - III. Models from 0.8 to 120 Msun at a metallicity Z = 0.002 (2013)
Journal Article
Georgy, C., Ekström, S., Eggenberger, P., Meynet, G., Haemmerlé, L., Maeder, A., …Barblan, F. (2013). Grids of stellar models with rotation - III. Models from 0.8 to 120 Msun at a metallicity Z = 0.002. Astronomy & Astrophysics, 558, Article A103. https://doi.org/10.1051/0004-6361/201322178

(shortened) We provide a grid of single star models covering a mass range from 0.8 to 120 Msun with an initial metallicity Z = 0.002 with and without rotation. We discuss the impact of a change in the metallicity by comparing the current tracks with... Read More about Grids of stellar models with rotation - III. Models from 0.8 to 120 Msun at a metallicity Z = 0.002.

Role of vacancies in the magnetic and electronic properties of SiC nanoribbons: A nab initio study (2013)
Journal Article
Morbec, J. M., & Rahman, G. (2013). Role of vacancies in the magnetic and electronic properties of SiC nanoribbons: A nab initio study. Physical review B: Condensed matter and materials physics, https://doi.org/10.1103/physrevb.87.115428

Using ab initio calculations based on density functional theory, we investigate the effects of vacancies on the electronic and magnetic properties of zigzag SiC nanoribbons (Z-SiCNR). Single (V C and V Si ) and double (V Si V Si and V Si V C) vacanc... Read More about Role of vacancies in the magnetic and electronic properties of SiC nanoribbons: A nab initio study.

A rapidly spinning supermassive black hole at the centre of NGC?1365. (2013)
Journal Article
(2013). A rapidly spinning supermassive black hole at the centre of NGC?1365. Nature, 449 - 451. https://doi.org/10.1038/nature11938

Broad X-ray emission lines from neutral and partially ionized iron observed in active galaxies have been interpreted as fluorescence produced by the reflection of hard X-rays off the inner edge of an accretion disk. In this model, line broadening and... Read More about A rapidly spinning supermassive black hole at the centre of NGC?1365..

Intrinsic magnetism in nanosheets of SnO2: A first-principles study (2013)
Journal Article
Abreu Da Silva Morbec. (2013). Intrinsic magnetism in nanosheets of SnO2: A first-principles study. Journal of Magnetism and Magnetic Materials, 104 -108. https://doi.org/10.1016/j.jmmm.2012.10.017

We propose intrinsic magnetism in nanosheets of SnO2, based on first-principles calculations. The electronic structure and spin density reveal that p orbitals of the oxygen atoms, surrounding Sn vacancies, have a non-itinerant nature which gives birt... Read More about Intrinsic magnetism in nanosheets of SnO2: A first-principles study.