A $\sim$100 mHz QPO in the X-ray emission from IGR J17361-4441

Abstract

IGR J17361-4441 was discovered by INTEGRAL undergoing its first detectable X-ray outburst in 2011 and initially classified as an accreting X-ray binary in the globular cluster NGC 6388. A reanalysis of the outburst data collected with INTEGRAL and Swift suggested that the enhanced X-ray emission from IGR J17361-4441 could have been due to a rare tidal disruption event of a terrestrial- icy planet by a white dwarf. In this letter we report on the analysis of XMM-Newton data collected in 2011 during the outburst from IGR J17361-4441. Our analysis revealed the presence of a $\sim$100 mHz quasi-periodic oscillation in the X-ray emission from the source and confirmed the presence of a soft thermal component (kT$\sim$0.08 keV) in its spectrum. We discuss these findings in the context of the different possibilities proposed to explain the nature of IGR J17361-4441.

Accepted for publication on A&A Letters

References in corpus (5)

• A 200-s Quasi-Periodicity Following the Tidal Disruption of a Star by a Dormant Black Hole
• The surface density profile of NGC 6388: a good candidate for harboring an intermediate-mass black hole
• Millihertz Oscillation Frequency Drift Predicts the Occurrence of Type I X-ray Bursts
• Quasi Periodic Oscillations and Strongly Comptonized X-ray emission from Holmberg IX X-1
• The puzzling source IGR J17361-4441 in NGC 6388: a possible planetary tidal disruption event

Cited by in corpus (3)

• New insights on the puzzling LMXB 1RXS J180408.9-342058: the intermediate state, the clocked type-I X-ray bursts and much more
• Upper-twin-peak quasiperiodic oscillation in x-ray binaries and the energy from tidal circularization of relativistic orbits
• Evidences of an innermost stable bound orbit predicted by general relativity from the amplitude of the twin-peak quasi-periodic oscillations