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Radio QPO in the ${\gamma}$-ray-loud X-ray binary LS I +61${^\circ}$303
High Energy Astrophysical Phenomena · Submitted 26 Jul 2017
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We conclude that the observed QPO could result from multiple shocks in a jet.
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The abstract, sentence by sentence
LS I +61${^\circ}$303 is a $\gamma$-ray emitting X-ray binary with periodic radio outbursts with time scales of one month. Previous observations have revealed microflares superimposed on these large outbursts with periods ranging from a few minutes to hours. This makes LS I +61${^\circ}$303, along with Cyg X-1, the only TeV emitting X-ray binary exhibiting radio microflares. To further investigate these microflaring activity in LS I +61${^\circ}$303 we observed the source with the 100-m Effelsberg radio telescope at 4.85, 8.35, and 10.45 GHz and performed timing analysis on the obtained data. Radio oscillations of 15 hours time scales are detected at all three frequencies. We also compare the spectral index evolution of radio data to that of the photon index of GeV data observed by Fermi-LAT. We conclude that the observed QPO could result from multiple shocks in a jet.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | LS I +61${^\circ}$303 is a $\gamma$-ray emitting X-ray binary with periodic radio outbursts with time scales of one month. | background 1.00 | 0.09 | 0.02 | asserted 1.00 |
| s1 | Previous observations have revealed microflares superimposed on these large outbursts with periods ranging from a few minutes to hours. | background 1.00 | 0.04 | 0.01 | asserted 1.00 |
| s2 | This makes LS I +61${^\circ}$303, along with Cyg X-1, the only TeV emitting X-ray binary exhibiting radio microflares. | background 0.99 | 0.07 | 0.03 | asserted 1.00 |
| s3 | To further investigate these microflaring activity in LS I +61${^\circ}$303 we observed the source with the 100-m Effelsberg radio telescope at 4.85, 8.35, and 10.45 GHz and performed timing analysis on the obtained data. | method 0.96 | 0.97 | 0.02 | asserted 0.93 |
| s4 | Radio oscillations of 15 hours time scales are detected at all three frequencies. | result 1.00 | 0.95 | 0.12 | asserted 1.00 |
| s5 | We also compare the spectral index evolution of radio data to that of the photon index of GeV data observed by Fermi-LAT. | method 0.79 | 0.88 | 0.02 | asserted 0.70 |
| s6 | We conclude that the observed QPO could result from multiple shocks in a jet. | interpretation 1.00 | 0.78 | 0.94 | hedged possibility 1.00 |
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Original abstract
LS I +61${^\circ}$303 is a $\gamma$-ray emitting X-ray binary with periodic radio outbursts with time scales of one month. Previous observations have revealed microflares superimposed on these large outbursts with periods ranging from a few minutes to hours. This makes LS I +61${^\circ}$303, along with Cyg X-1, the only TeV emitting X-ray binary exhibiting radio microflares. To further investigate these microflaring activity in LS I +61${^\circ}$303 we observed the source with the 100-m Effelsberg radio telescope at 4.85, 8.35, and 10.45 GHz and performed timing analysis on the obtained data. Radio oscillations of 15 hours time scales are detected at all three frequencies. We also compare the spectral index evolution of radio data to that of the photon index of GeV data observed by Fermi-LAT. We conclude that the observed QPO could result from multiple shocks in a jet.
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