Photoionization modeling indicates NGC 5408 X-1's EUV and X-ray emission is mildly beamed, consistent with supercritical accretion.
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Feasibility calculations show SKA-Mid can detect polarized emission from a Holmberg II X-1-like ULX jet within 10 hours up to ~10 Mpc, while the bubble requires ~100 hours.
Deep VLBI observations of four ULXs yield no compact radio detections and tight upper limits, disfavoring persistently bright hard-state-like compact cores.
citing papers explorer
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Photoionization of the Composite Nebula Surrounding NGC 5408 X-1: Implications for Beamed Emission
Photoionization modeling indicates NGC 5408 X-1's EUV and X-ray emission is mildly beamed, consistent with supercritical accretion.
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Polarimetry of Ultraluminous X-ray sources
Feasibility calculations show SKA-Mid can detect polarized emission from a Holmberg II X-1-like ULX jet within 10 hours up to ~10 Mpc, while the bubble requires ~100 hours.
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Deep VLBI constraints on compact radio cores in four ultraluminous X-ray sources
Deep VLBI observations of four ULXs yield no compact radio detections and tight upper limits, disfavoring persistently bright hard-state-like compact cores.