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- 115Physics, Department of
- 113Physics, Department of/Journal Articles (Physics)
- 1Earth and Atmospheric Sciences, Department of
- 1Earth and Atmospheric Sciences, Department of/Journal Articles (Earth and Atmospheric Sciences)
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- 73Rankin, Robert
- 32Sivakoff, Gregory Robert
- 18Kabin, Konstantin
- 15Marchand, Richard
- 13Altamirano, Diego
- 13Miller-Jones, James C. A.
- 23X-Rays: Binaries
- 14Field Line Resonances
- 11Radio Continuum: Stars
MATLAB functions for Lightning Excitation of the Ionospheric Alfvén Resonator by Charles NokesDownload
Code for the analysis in the thesis titled "Lightning Excitation of the Ionospheric Alfvén Resonator" by Charles Nokes was written in Matlab. 26 Matlab functions were created in all. lightning_and_iar.m is the function in which all the main input parameters are set. It then calls the next...
International Collaboration Within the United Nations Committee on the Peaceful Uses of Outer Space: Framework for International Space Weather Services (2018–2030)Download
Severe space weather is a global threat that requires a coordinated global response. In this Commentary, we review some previous successful actions supporting international coordination between member states in the United Nations (UN) context and make recommendations for a future approach. Member...
The X-ray spectra of intermediate polars can be modelled to give a direct measurement of white dwarf mass. Here, we fit accretion column models to NuSTAR spectra of three intermediate polars; V709 Cas, NY Lup, and V1223 Sgr in order to determine their masses. From fits to 3–78 keV spectra, we...
Tudor, Vlad, Miller-Jones, James C. A., Knigge, C., Maccarone, Thomas J., Tauris, T. M., Bahramian, Arash, Chomiuk, Laura, Heinke, Craig O., Sivakoff, Gregory Robert, Strader, Jay, Plotkin, Richard M., Soria, Roberto, Albrow, M. D., Anderson, G. E., van den Berg, Maureen, Bernardini, Federico, Bogdanov, Slavko, Britt, Christopher. T., Russell, D. M., Zurek, David R.
To confirm the nature of the donor star in the ultracompact X-ray binary candidate 47 Tuc X9, we obtained optical spectra (3000–10 000 Å) with the Hubble Space Telescope / Space Telescope Imaging Spectrograph. We find no strong emission or absorption features in the spectrum of X9. In particular,...
Extreme quiescent variability of the transient neutron star low-mass X-ray binary EXO 1745-248 in Terzan 5Download
Rivera Sandoval, L. E., Wijnands, Rudy, Denegaar, Nathalie, Cavecchi, Y., Heinke, Craig O., Cackett, Edward M., Homan, Jeroen, Altamirano, Diego, Bahramian, Arash, Sivakoff, Gregory Robert, Miller, Jon M., Parikh, Aastha S.
EXO 1745−248 is a transient neutron star low-mass X-ray binary that resides in the globular cluster Terzan 5. We studied the transient during its quiescent state using 18 Chandra observations of the cluster acquired between 2003 and 2016. We found an extremely variable source, with a luminosity...
On the Role of Last Closed Drift Shell Dynamics in Driving Fast Losses and Van Allen Radiation Belt ExtinctionDownload
We present observations of very fast radiation belt loss as resolved using high time resolution electron flux data from the constellation of Global Positioning System (GPS) satellites. The time scale of these losses is revealed to be as short as ∼0.5–2 hr during intense magnetic storms, with...
Sanna, Andrea, Bahramian, Arash, Bozzo, E., Heinke, Craig O., Wijnands, Rudy, Degenaar, Nathalie, Maccarone, T., Riggio, Alessandro, Di Salvo, Tiziana, Iaria, Rosario, Burgay, M., Possenti, Andrea, Ferrigno, C., Papitto, A., Sivakoff, Gregory Robert, D'Amico, Nicolo, Burderi, Luciano, Altamirano, Diego
We report the discovery of X-ray pulsations at 105.2 Hz (9.5 ms) from the transient X-ray binary IGR J16597–3704 using NuSTAR and Swift. The source was discovered by INTEGRAL in the globular cluster NGC 6256 at a distance of 9.1 kpc. The X-ray pulsations show a clear Doppler modulation that...
We experimentally investigate the behaviour of a line-source plume falling through a finite two-layer stratified ambient where the depth of the upper ambient layer increases in time. Laboratory observations suggest one of two possible flow regimes depending on the value of 𝜆 , which represents...
The X-ray light curves of the recurring outbursts observed in low-mass X-ray binaries provide strong test beds for constraining (still) poorly understood disc-accretion processes. These light curves act as a powerful diagnostic to probe the physics behind the mechanisms driving mass inflow and...
We present Atacama Large Millimetre/Sub-Millimetre Array (ALMA) observations of IRAS 19132+1035, a candidate jet–interstellar medium (ISM) interaction zone near the black hole X-ray binary (BHXB) GRS 1915+105. With these ALMA observations (combining data from the 12 m array and the Atacama...