Search
Skip to Search Results- 122Physics, Department of
- 120Physics, Department of/Journal Articles (Physics)
- 1Earth and Atmospheric Sciences, Department of
- 1Earth and Atmospheric Sciences, Department of/Journal Articles (Earth and Atmospheric Sciences)
- 1Physics, Department of/Conference/Workshop Presentations (Physics)
- 1Physics, Department of/Book Chapters (Physics)
- 73Rankin, Robert
- 32Sivakoff, Gregory Robert
- 18Kabin, Konstantin
- 15Marchand, Richard
- 13Altamirano, Diego
- 13Miller-Jones, James C. A.
- 23X-Rays: Binaries
- 14Field Line Resonances
- 14Magnetosphere
- 11Accretion
- 11Radio Continuum: Stars
- 10Acceleration
-
Understanding X-ray irradiation in low-mass X-ray binaries directly from their light-curves
Download2018-01-01
Sivakoff, Gregory Robert, Tetarenko, Bailey E., Dubus, G., Lasota, Jean-Pierre, Heinke, Craig O.
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...
-
2018-01-01
Tetarenko, Alexandra Jean, Freeman, P., Rosolowsky, E. W., Miller-Jones, James C. A., Sivakoff, Gregory Robert
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...
-
2018-01-01
Shaw, A. W., Heinke, Craig O., Mukai, K., Sivakoff, Gregory Robert, Tomsick, John A., Rana, Vikram
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...
-
Extreme quiescent variability of the transient neutron star low-mass X-ray binary EXO 1745-248 in Terzan 5
Download2018-01-01
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...
-
International Collaboration Within the United Nations Committee on the Peaceful Uses of Outer Space: Framework for International Space Weather Services (2018–2030)
Download2018-05-06
Mann, I. R., Di Pippo, S., Opgenoorth, H. J., Kuznetsova, M., Kendall, D. J.
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...
-
2018-01-01
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,...
-
2017-01-01
Bahramian, Arash, Heinke, Craig O., Tudor, Vlad, Miller-Jones, James. C. A., Bogdanov, Slavko, Maccarone, Thomas J., Knigge, C., Sivakoff, Gregory Robert, Chomiuk, Laura, Strader, Jay, Garcia, Javier A., Kallman, Timothy
47 Tuc X9 is a low-mass X-ray binary (LMXB) in the globular cluster 47 Tucanae, and was previously thought to be a cataclysmic variable. However, Miller-Jones et al. recently identified a radio counterpart to X9 (inferring a radio/X-ray luminosity ratio consistent with black hole LMXBs), and...
-
2017-01-01
Mooley, Kunal. P., Miller-Jones, James. C. A., Fender, Rob P., Sivakoff, Gregory Robert, Rumsey, C., Perrott, Y., Titterington, David, Grainge, K. J. B., Russell, Thomas D., Carey, S. H., Hickish, Jack, Razavi-Ghods, Nima, Scaife, A., Scott, P., Waagen, Elizabeth O.
The connection between accretion and jet production in accreting white dwarf binary systems, especially dwarf novae, is not well understood. Radio wavelengths provide key insights into the mechanisms responsible for accelerating electrons, including jets and outflows. Here, we present densely...
-
2017-01-01
Tetarenko, Alexandra Jean, Sivakoff, Gregory Robert, Miller-Jones, James C. A., Rosolowsky, E. W., Petitpas, G., Gurwell, M., Wouterloot, J., Fender, Rob P., Heinz, S., Maitra, D., Markoff, Sera B., Migliari, Simone, Rupen, Michael P., Rushton, Anthony P., Russell, D. M., Russell, Thomas D., Sarazin, Craig L.
We present simultaneous radio through sub-mm observations of the black hole X-ray binary (BHXB) V404 Cygni during the most active phase of its June 2015 outburst. Our 4 h long set of overlapping observations with the Very Large Array, the Sub-millimeter Array and the James Clerk Maxwell Telescope...
-
3-D Joint Inversion of Magnetotelluric and Airborne Tipper Data: A case study from the Morrison porphyry Cu-Au-Mo deposit, British Columbia, Canada
Download2017-01-01
Lee, Benjamin M, Unsworth, Martyn, Hubert, Juliane, Richards, Jeremy, Legault, Jean M
Z-axis tipper electromagnetic (ZTEM) and broadband magnetotelluric (MT) data were used to determine three-dimensional (3-D) electrical resistivity models of the Morrison porphyry Cu-Au-Mo deposit in British Columbia. ZTEM data are collected with a helicopter, thus allowing rapid surveys with...