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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¨

• sel, Lisa Zimmermann

Collaborators Emmanouil Angelakis MPIfR Masha Chernyakova Dublin City University Giuseppe Cim`

• 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)

Step-like pattern Westerbork Synthesis Radio Telescope at 5 GHz

• Fig. 2 in Peracaula et al. (1997)

Periodicity of 1.4 h Very Large Array 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

• 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

Effelsberg data

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

• Fig. 3 in Jaron et al. (2017, MNRAS Letters)

Methods

1 Wavelet

(Torrence & Compo, 1998)

2 Autocorrelation 3 Lomb-Scargle

P = 15.4±0.6 hours ⇒ Detection of QPO.

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¨
• sel, R. Sharma, M. Massi, G. Cim`
• , 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¨

• sel et al. (Accepted by MNRAS)

2 X-rays: Hint for variability by Harrison et al. (2000)

QPO detected by N¨

• sel 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.).

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