Production of 92Nb, 92Mo, and 146Sm in the gamma-process in SNIa (2014)
Presentation / Conference
Rauscher, T., Travaglio, C., Gallino, R., Nishimura, N., & Hirschi, R. (2014, July). Production of 92Nb, 92Mo, and 146Sm in the gamma-process in SNIa. Paper presented at 13th Symposium on Nuclei in the Cosmos (NIC XIII), Debrecen, Hungary

The knowledge of the production of extinct radioactivities like 92Nb and 146Sm by photodisintegration processes in ccSN and SNIa models is essential for interpreting abundances in meteoritic material and for Galactic Chemical Evolution (GCE). The 92M... Read More about Production of 92Nb, 92Mo, and 146Sm in the gamma-process in SNIa.

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.

Difficulties in Probing Nuclear Physics: A Study of Ti and Ni (2008)
Presentation / Conference
Hungerford, A., Fryer, C. L., Timmes, F. X., Young, P., Bennett, M., Diehl, S., …Rockefeller, G. (2008, July). Difficulties in Probing Nuclear Physics: A Study of Ti and Ni. Paper presented at 10th Symposium on Nuclei in the Cosmos, Mackinac Island, Michigan, USA

The nucleosynthetic yield from a supernova explosion depends upon a variety of effects: progenitor evolution, explosion process, details of the nuclear network, and nuclear rates. Especially in studies of integrated stellar yields, simplifications re... Read More about Difficulties in Probing Nuclear Physics: A Study of Ti and Ni.

44Ti and 56Ni in core-collapse supernovae (2008)
Presentation / Conference
Magkotsios, G., Timmes, F. X., Wiescher, M., Fryer, C. L., Hungerford, A., Young, P., …Rockefeller, G. (2008, July). 44Ti and 56Ni in core-collapse supernovae. Paper presented at 10th Symposium on Nuclei in the Cosmos, Mackinac Island, Michigan, USA

We investigate the physical conditions where 44Ti and 56Ni are created in core-collapse supernovae. In this preliminary work we use a series of post-processing network calculations with parametrized expansion profiles that are representative of the w... Read More about 44Ti and 56Ni in core-collapse supernovae.

NuGrid: Toward High Precision Double-Degenerate Merger Simulations with SPH in 3D (2008)
Presentation / Conference
(2008, July). NuGrid: Toward High Precision Double-Degenerate Merger Simulations with SPH in 3D. Presented at 10th Symposium on Nuclei in the Cosmos, Mackinac Island, Michigan, USA

We present preliminary results from recent high-resolution double-degenerate merger simulations with the Smooth Particle Hydrodynamics (SPH) technique. We put particular emphasis on verification and validation in our effort and show the importance of... Read More about NuGrid: Toward High Precision Double-Degenerate Merger Simulations with SPH in 3D.

Nucleosynthetic Yields from "Collapsars" (2008)
Presentation / Conference
(2008, July). Nucleosynthetic Yields from "Collapsars". Presented at 10th Symposium on Nuclei in the Cosmos, Mackinac Island, Michigan, USA

The "collapsar" engine for gamma-ray bursts invokes as its energy source the failure of a normal supernova and the formation of a black hole. Here we present the results of the first three-dimensional simulation of the collapse of a massive star down... Read More about Nucleosynthetic Yields from "Collapsars".

The impact of stellar rotation on the CNO abundance patterns in the Milky Way at low metallicities (2008)
Presentation / Conference
(2008, July). The impact of stellar rotation on the CNO abundance patterns in the Milky Way at low metallicities. Presented at 10th Symposium on Nuclei in the Cosmos, Mackinac Island, Michigan, USA

We investigate the effect of new stellar models, which take rotation into account, computed for very low metallicities on the chemical evolution of the earliest phases of the Milky Way. We check the impact of these new stellar yields on a model for t... Read More about The impact of stellar rotation on the CNO abundance patterns in the Milky Way at low metallicities.

Nucleosynthesis Calculations from Core-Collapse Supernovae (2008)
Presentation / Conference
(2008, July). Nucleosynthesis Calculations from Core-Collapse Supernovae. Presented at 10th Symposium on Nuclei in the Cosmos, Mackinac Island, Michigan, USA

We review some of the uncertainties in calculating nucleosynthetic yields, focusing on the explosion mechanism. Current yield calculations tend to either use a piston, energy injection, or enhancement of neutrino opacities to drive an explosion. We s... Read More about Nucleosynthesis Calculations from Core-Collapse Supernovae.

Complete nucleosynthesis calculations for low-mass stars from NuGrid (2008)
Presentation / Conference
(2008, July). Complete nucleosynthesis calculations for low-mass stars from NuGrid. Presented at 10th Symposium on Nuclei in the Cosmos, Mackinac Island, Michigan, USA

Many nucleosynthesis and mixing processes of low-mass stars as they evolve from the Main Sequence to the thermal-pulse Asymptotic Giant Branch phase (TP-AGB) are well understood (although of course important physics components, e.g. rotation, magneti... Read More about Complete nucleosynthesis calculations for low-mass stars from NuGrid.

Spatial Distribution of Nucleosynthesis Products in Cassiopeia A: Comparison Between Observations and 3D Explosion Models (2008)
Presentation / Conference
(2008, July). Spatial Distribution of Nucleosynthesis Products in Cassiopeia A: Comparison Between Observations and 3D Explosion Models. Presented at 10th Symposium on Nuclei in the Cosmos, Mackinac Island, Michigan, USA

We examine observed heavy element abundances in the Cassiopeia A supernova remnant as a constraint on the nature of the Cas A supernova. We compare bulk abundances from 1D and 3D explosion models and spatial distribution of elements in 3D models with... Read More about Spatial Distribution of Nucleosynthesis Products in Cassiopeia A: Comparison Between Observations and 3D Explosion Models.

Testing convection in stellar models using detached eclipsing binaries (2006)
Presentation / Conference
(2006, August). Testing convection in stellar models using detached eclipsing binaries. Presented at IAUS 239 (Convection in Astrophysics), Prague

The fundamental properties of detached eclipsing binary stars can be measured very accurately, which could make them important objects for constraining the treatment of convection in theoretical stellar models. However, only four or five pieces of in... Read More about Testing convection in stellar models using detached eclipsing binaries.

Asteroseismology with SuperWASP
Presentation / Conference
Smalley, B. Asteroseismology with SuperWASP

The highly successful SuperWASP planetary transit finding programme has surveyed a large fraction of both the northern and southern skies. There now exists in the its archive over 420 billion photometric measurements for more than 31 million stars. S... Read More about Asteroseismology with SuperWASP.

The first K2 roAp star: HD 24355 pulsating in a distorted quadruploe mode
Presentation / Conference
Smalley. The first K2 roAp star: HD 24355 pulsating in a distorted quadruploe mode. Presented at eismology of the Sun and the Distant Stars 2016 – Using Today’s Successes to Prepare the Future – TASC2 & KASC9 Workshop – SPACEINN & HELAS8 Conference

We present an analysis of the first K2 observations of a rapidly oscillating Ap (roAp) star, HD 24355. The star was discovered to be a roAp star by [1], with a frequency of 224.31 d-1 (2596.18 µHz; P = 6.4 min) and an amplitude of 1.51 mmag in SuperW... Read More about The first K2 roAp star: HD 24355 pulsating in a distorted quadruploe mode.