(X-ray) binaries in γ-rays
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1 (X-ray) binaries in γ-rays Guillaume Dubus Understanding relativistic jets, Kraków 2011 Institut de Planétologie et d Astrophysique de Grenoble
2 Variable galactic γ-ray sources gamma-ray binaries O/Be + compact object: PSR B1259, LS 5039, LS I , HESS J0632, 1FGL J1018 X-ray binaries / microquasars in gamma-rays WR/O + compact object: Cyg X-3, (Cyg X-1) symbiotic novae M giant + white dwarf: V407 Cyg colliding wind binaries massive star binary: (Eta Carinae) interacting black hole or neutron star + normal star pulsars Crab flare, pulsars in binaries unidentified transients in the Galactic Plane
3 Gamma-ray binaries O/Be + compact object PSR B , LS 5039, LS I , HESS J0632, 1FGL J1018 dominant gamma-ray emission likely pulsar winds in binaries PSR B LS I spectral energy distribution (Zdziarski et al. 2009)
4 Gamma-ray binaries O/Be + compact object PSR B , LS 5039, LS I , HESS J0632, 1FGL J1018 dominant gamma-ray emission likely pulsar winds in binaries PSR B known & expected γ-rays pulse (ms) Porb companion de/dt (erg/s) PSR B d Be PSR J d > 11 M PSR J d > 6 M PSR J d > 4 M pulsar catalog Lorimer 2008
5 Radio morphology Dhawan et al comet tails on m.a.s. scales in PSR B , LS I+61 o 303, LS5039
6 Gamma-ray binaries system Porb radio X-ray GeV TeV PSR B LS 5039 LS I +61 o 303 HESS J FGL J psr Be 1237? O 3.9? Be 26.5? Be 320? O 16.6 detected detected + orbital modulation
7 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. 2006
8 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 ;Kirk +, Khangulyan & Bosch-Ramon, Sierpowska-Bartosik & Torres, Takata & Taam, Yamaguchi & Takahara
9 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) Bednarek ;Kirk +, Khangulyan & Bosch-Ramon, Sierpowska-Bartosik & Torres, Takata & Taam, Yamaguchi & Takahara
10 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
11 γ-ray modulation of LS 5039 Cerutti et al Massive star + orbit fixes emission value of B
12 Pair cascade LS 5039 Significant pair cascade emission at sup conj. Limits magnetic field <B>~a few G, compatible with pulsar. VHE lightcurve & model cascade emission sup. conjunction total pairs Cerutti et al. 2010
13 Modulated Doppler boost Puzzling X-ray modulation in LS 5039 Takahashi et al Shocked wind ~ relativistic, orientation changes along orbit Doppler boost changes synchrotron and IC lightcurve LS 5039 VHE X-ray GD et al caveat: X-ray emission region likely large Szostek+ 2011
14 LS I+61 o 303 modulation: inverse Compton on star photons? Abdo et al au to observer 26 d HE peak offset from IC expectations HE modulation absent recently VHE peak phase varies
15 LS I+61 o 303 modulation: inverse Compton on star photons? spectrum: two populations of HE particles? (also LS 5039) Abdo et al pulsar magnetospheric pulsar wind emission nebula (but modulation, variability??)
16 LS I+61 o 303 modulation: inverse Compton on star photons? spectrum: two populations of HE particles? (also LS 5039) Abdo et al striped pulsar wind emission? (Pétri & GD 2011) pulsar wind nebula
17 PSR B Fermi/LAT lightcurve (Abdo et al. 2011) orbit close to periastron erg/s spindown pulsar in 3.5 year orbit around Be star Fermi/LAT detection at periastron mid-december 2010 brighter in February (near inf. conjunction)
18 PSR B Fermi/LAT lightcurve (Abdo et al. 2011) orbit close to periastron More complex than inv. Compton on star photons Be disk (π0, free-free...)? HE sync? Doppler boost? IC on other fields?... Nearly all spindown power radiated away at peak
19 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
20 Cygnus X-3 flares AGILE & Fermi/LAT detections Tavani et al. 2009, Abdo et al. 2009, Williams et al. 2011, + ATels Swift/BAT kev Fermi Abdo et al AGILE AGILE
21 HE γ-rays from a microquasar Relations between X-rays, radio, γ-ray Link between non-thermal processes and jet formation? Only confirmed detection from a microquasar Radio jet Cyg X-3 (Martí et al. 2001) Figure: A. Szostek γ-rays <10% X-rays
22 γ-ray and X-ray modulation X-ray modulation from Thomson scattering in Wolf-Rayet wind Abdo et al X-ray max inf. conj. X-ray min sup. conj. X-rays γ-ray modulation due to inv. Compton on Wolf-Rayet photons?
23 γ-ray and X-ray modulation γ-ray modulation due to inv. Compton on Wolf-Rayet photons GD et al. 2010, Cerutti et al X-ray max inf. conj. ~γ-ray min X-ray min sup. conj. ~γ-ray max X-rays location: not too close/far, recollimation shock? precession?
24 γ-ray and X-ray modulation γ-ray modulation due to inv. Compton on Wolf-Rayet photons GD et al. 2010, Cerutti et al X-ray max inf. conj. ~γ-ray min X-ray min sup. conj. ~γ-ray max X-rays location: not too close/far, recollimation shock? precession? matter, radiation field density : is Cyg X-3 unique?
25 Summary γ-ray emission from NS/BH binaries F. Mirabel 2006 gamma-ray binaries (rotation) X-ray binaries / μquasar (accretion) Orbital modulations are a powerful tool to understand these systems
26 Summary γ-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
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