(X-ray) binaries in γ-rays
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1 (X-ray) binaries in γ-rays Guillaume Dubus thanks to B. Cerutti, S. Corbel, R. Corbet, R. Dubois, G. Henri, A. Hill, M. de Naurois, J. Pétri, A. Szostek..., Fermi/LAT & HESS collaborations TIARA workshop on the transient universe - NTHU, Hsinchu Taiwan Institut de Planétologie et d Astrophysique de Grenoble 1
2 Transients in the Galactic Plane Fermi/LAT all-sky survey mode. Automated search runs every 6 hours, 1 day, 1 week. weekly report Fermi/LAT 1 day 2
3 Transients in the Galactic Plane 3
4 Gamma-rays from a nova thermonuclear runaway WD ejects 10-6 M at ~ 3000 km/s symbiotic system: red giant wind & radiation Abdo et al Walder, Folini & Shore 2008 Mini-supernova, erg,!0 from high energy p + or IC on e - one every few years? (Yungelson et al. 1995) 4
5 Binaries in gamma-rays gamma-ray binaries (5) γ-ray emission dominates, modulated on orbital period powered by spindown of young pulsar (?) new probe of pulsar relativistic winds accreting X-ray binaries (1) accretion-powered, neutron star, black hole non-thermal radio emission associated to relativistic jet Cyg X-3, flares, modulation on orbital period Symbiotic nova (1) thermonuclear runaway ejects shell shock acceleration, mini SNR Colliding wind binary (1?) non-thermal emission associated with shock structure accreting compact binary gamma-ray binary symbiotic nova 5
6 Gamma-ray binaries O/Be + compact object d orbits dominant gamma-ray emission rotation powered by high E pulsar (?) probes of pulsar winds LS I spectral energy distribution (Zdziarski et al. 2009) GD
7 radio morphology Dhawan et al LS I (also PSR B1259, LS 5039, HESS J0632) 7
8 magnetar-like activity? SGR/AXP burst within 2 of LS I+61 o 303 Swift BAT GCN ms burst, E=10 37 erg blackbody kt=7.5 kev, R=100m 8
9 Gamma-ray binaries detected detected + orbital variability system Porb radio X-ray GeV TeV PSR B LS 5039 LS I HESS J FGL J psr Be 1237? O 3.9? Be 26.5? Be 320? O
10 Low-mass gamma-ray binaries...? detected detected + orbital variability system Porb radio X-ray GeV TeV PSR B LS 5039 LS I HESS J FGL J PSR J XSS J black widow... psr Be 1237? O 3.9? Be 26.5? Be 320? O 16.6 psr M 0.2? M 0.2 psr low
11 Orbital modulations X-rays (HESS J0632) (Swift) radio (PSR B ) (Parkes) Bongiorno et al Johnston et al GeV (LS I ) (Fermi/LAT) TeV (LS 5039) (HESS) Abdo et al Aharonian et al
12 γ-ray modulation inverse Compton on star photons apastron periastron apastron periastron apastron periastron inverse Compton (GeV) Bednarek ; Khangulyan & Bosch-Ramon, Sierpowska-Bartosik & Torres, GD Cerutti Henri, Takata & Taam, Yamaguchi & Takahara 13
13 γ-ray modulation inverse Compton on star photons pair production on star photons (opacity) apastron periastron apastron periastron apastron periastron inverse Compton (GeV) inverse Compton + pair production (TeV) Bednarek ; Khangulyan & Bosch-Ramon, Sierpowska-Bartosik & Torres, GD Cerutti Henri, Takata & Taam, Yamaguchi & Takahara 14
14 γ-ray modulation inverse Compton on star photons: anisotropic pair production on star photons (opacity) inf conj sup conj inf conj sup conj inf conj sup conj to observer inverse Compton (GeV) Bednarek ; Khangulyan & Bosch-Ramon, Sierpowska-Bartosik & Torres, GD Cerutti Henri, Takata & Taam, Yamaguchi & Takahara 15
15 γ-ray modulation inverse Compton on star photons: anisotropic pair production on star photons (opacity): anisotropic inf conj sup conj inf conj sup conj inf conj sup conj to observer inverse Compton (GeV) inverse Compton + pair production (TeV) identify emission mechanism distinguish intrinsic variability from variability due to observer geometry Bednarek ; Khangulyan & Bosch-Ramon, Sierpowska-Bartosik & Torres, GD Cerutti Henri, Takata & Taam, Yamaguchi & Takahara 16
16 γ-ray modulation of LS 5039 Massive star + orbit fixes (almost) everything Cerutti et al
17 VHE pair cascade LS 5039 Significant pair cascade emission at superior conjunction Limits magnetic field <B>~a few G. VHE lightcurve & model cascade emission sup. conjunction total pairs Cerutti et al
18 Modulated Doppler boost X-ray modulation in LS 5039 Takahashi+, Kishishita LS 5039 VHE X-ray GD
19 Modulated Doppler boost X-ray modulation in LS 5039 Takahashi+, Kishishita shocked wind ~ relativistic, orientation changes along orbit Doppler boost changes synchrotron and IC lightcurve LS 5039 VHE X-ray GD caveat: X-ray emission region likely large Szostek
20 LS I+61 o 303: lightcurve modulation: inverse Compton on star photons? Abdo+ 2009, Hadasch+ submitted 0.7 au to observer 26 d HE peak offset from IC expectations HE (VHE) modulation changes 21
21 LS I+61 o 303: spectrum spectrum: two populations of HE particles Hadasch+ submitted striped pulsar wind emission? (Pétri & GD 2011) GeV-faint, TeV-bright systems? pulsar wind nebula 22
22 X-ray binaries / microquasars relativistic outflow (radio, IR) probe link with gamma-rays normal star (IR, optical) accretion disk (optical, X, LE!) Image H. Spruit black hole or neutron star Accreting binaries in gamma-rays: Cygnus X-3 23
23 Cyg X-3: a microquasar in γ-rays AGILE & Fermi/LAT detections Tavani+ 2009, Abdo+ 2009, Williams+ 2011, Bulgarelli+ 2011, Corbel+ sub. Swift/BAT kev Fermi Abdo et al AGILE AGILE 24
24 Major radio flare, March 21, 2011 Corbel+ subm. Accretion non-thermal / thermal Ejection 25
25 HE γ-rays from a microquasar Figure: A. Szostek!-rays <10% X-rays 26
26 γ-ray and X-ray modulation X-ray modulation: Thomson scattering in Wolf-Rayet wind Abdo ~γ-ray min X-ray max inf. conj. X-ray min sup. conj. ~γ-ray max X-rays 27
27 γ-ray and X-ray modulation γ-ray modulation: inverse Compton on Wolf-Rayet photons GD ~γ-ray min X-ray max inf. conj. X-ray min sup. conj. ~γ-ray max X-rays 28
28 γ-ray and X-ray modulation location: not too close/far, recollimation shock? precession? GD X-rays 29
29 γ-ray emission zone corona unlikely Cerutti γγ opacity non-thermal corona 30
30 How unique is Cygnus X-3? Cyg X-3 HMXB LS 5039 Cyg X-1 LS I LMXB PSR B
31 Summary!-ray emission from NS/BH binaries F. Mirabel 2006 gamma-ray binaries (rotation) X-ray binaries / μquasar (accretion)!-ray flares/modulations are a powerful tool to understand these systems 32
32 Summary!-ray emission from NS/BH binaries F. Mirabel 2006 gamma-ray binaries (rotation) X-ray binaries / μquasar (accretion) Pulsars, Pulsar Wind Nebulae (Colliding Wind Binaries) Active Galactic Nuclei Gamma-Ray Bursts 33
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