Detection of radio quasi-periodic oscillations in the γ -ray-loud X-ray binary LS I +61 ◦ 303 Fr´ ed´ eric Jaron Max-Planck-Institute for Radio Astronomy Institute of Geodesy and Geoinformation, University of Bonn Effelsberg Science Workshop February 21, 2018 Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 1 / 13
The team Quasi-periodic oscillations in LS I +61 ◦ 303 Project: Quasi-periodic oscillations in LS I +61 ◦ 303 The team Maria Massi (P.I.) MPIfR Richa Sharma MPIfR Fr´ ed´ eric Jaron University of Bonn Former members: Silvia N¨ osel, Lisa Zimmermann Collaborators Emmanouil Angelakis MPIfR Masha Chernyakova Dublin City University Giuseppe Cim` o JIVE Sergio Dzib MPIfR Lars Fuhrmann University of Siegen Alex Kraus MPIfR Guang-Xing Li University of Munich Ioannis Myserlis MPIfR Xun Shi Max Planck Institute for Astrophysics Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 2 / 13
Introduction X-ray binaries Artist’s impression of an X-ray binary, c � NASA/CXC/M.Weiss. Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 3 / 13
Introduction X-ray binaries Artist’s impression of an X-ray binary, c � NASA/CXC/M.Weiss. Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 3 / 13
Introduction Radio outbursts Cyg X-3 Observed with Greenbank Interferometer, Waltman et al. (1995) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 4 / 13
Introduction Radio outbursts LS I +61 ◦ 303 Observed with Greenbank Interferometer, Ray et al. (1995) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 5 / 13
Introduction Radio outbursts LS I +61 ◦ 303 – Outbursts predictable (Jaron & Massi 2013, A&A) Observed with Greenbank Interferometer, Ray et al. (1995) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 5 / 13
Introduction Microflaring in LS I +61 ◦ 303 Fig. 2 in Taylor et al. (1992) Fig. 2 in Peracaula et al. (1997) Step-like pattern Periodicity of 1.4 h Westerbork Synthesis Radio Very Large Array at 5 GHz Telescope at 5 GHz Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 6 / 13
Introduction Microflaring in LS I +61 ◦ 303 Effelsberg data Fig. 1 in Zimmermann, Fuhrmann, & Massi (2015, A&A Letters) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 7 / 13
Results The light curves Jaron, Sharma, Massi, Fuhrmann, Angelakis, Myserlis, Li, Shi (2017, MNRAS Letters) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 8 / 13
Results The light curves Jaron, Sharma, Massi, Fuhrmann, Angelakis, Myserlis, Li, Shi (2017, MNRAS Letters) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 8 / 13
Results The light curves Jaron, Sharma, Massi, Fuhrmann, Angelakis, Myserlis, Li, Shi (2017, MNRAS Letters) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 8 / 13
Results The light curves Jaron, Sharma, Massi, Fuhrmann, Angelakis, Myserlis, Li, Shi (2017, MNRAS Letters) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 8 / 13
Results The light curves Jaron, Sharma, Massi, Fuhrmann, Angelakis, Myserlis, Li, Shi (2017, MNRAS Letters) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 8 / 13
Results The light curves Jaron, Sharma, Massi, Fuhrmann, Angelakis, Myserlis, Li, Shi (2017, MNRAS Letters) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 8 / 13
Results Timing analysis Timing analysis of 5 GHz data Methods 1 Wavelet (Torrence & Compo, 1998) 2 Autocorrelation 3 Lomb-Scargle P = 15 . 4 ± 0 . 6 hours ⇒ Detection of QPO. Fig. 3 in Jaron et al. (2017, MNRAS Letters) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 9 / 13
Results QPO during rising part of radio outbursts WSRT, 2 GHz, P ≈ 55 minutes X-ray (Suzaku), P ≈ 2 hours Previous hint for X-ray variability Fig. 5 in Harrison et al. (2000) S. N¨ osel, R. Sharma, M. Massi, G. Cim` o, and M. Chernyakova (accepted by MNRAS) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 10 / 13
Conclusions Physical scenario GRS 1915+105 – QPOs have been interpreted as ejection of plasmoids Fig. 7 in Mirabel & Rodriguez (1999) Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 11 / 13
Conclusions Physical scenario Fig. 1 a in Yuan et al. (2009) Fig. 1 in Petropoulou et al. (2016) Magnetic reconnection can occur in the disk (Yuan et al. 2009), in the jet (Petropoulou et al. 2016, Sironi et al. 2016). In magnetic reconnection events the current sheet fragments into a chain of plasmoids that can be of different size and can be ejected with different timescales (minutes, hours, days). Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 12 / 13
Conclusions Summary 1 Radio: Short-term variability observed by Taylor et al. (1992) Zimmermann, Fuhrmann, & Massi (2015, A&A Letters) QPO have been detected Peracaula et al. (1997) Jaron et al. (2017, MNRAS Letters) N¨ osel et al. (Accepted by MNRAS) 2 X-rays: Hint for variability by Harrison et al. (2000) QPO detected by N¨ osel et al. (Accepted by MNRAS) 3 Magnetic reconnection in the accretion disk or the jet is a possible physical process behind QPO (Yuan et al. 2009, Petropoulou et al. 2016, Sironi et al. 2016). 4 Work in progress: In summer 2017 multifrequency radio and simultaneous X-ray observations of LS I +61 ◦ 303 were carried out to further investigate the coupling between accretion and ejection in X-ray binaries (Sharma, Massi, Kraus, Dzib et al., in prep.). Fr´ ed´ eric Jaron (IGG Uni Bonn) Radio QPO in LS I +61 ◦ 303 February 21, 2018 13 / 13
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