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Jets from quiescent stellar black holes Elena Gallo UCSB

Jets from quiescent stellar black holes Elena Gallo UCSB. Black hole X-ray binary jets. Hard X-ray state : Persistent radio emission with flat radio-mm spectrum Partially self-absorbed synchrotron from conical outflow ( Blandford & Königl‘79; Hjellming & Johnston‘88; Kaiser‘06 )

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Jets from quiescent stellar black holes Elena Gallo UCSB

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  1. Jets from quiescent stellar black holesElena GalloUCSB

  2. Black hole X-ray binary jets Hard X-ray state: • Persistent radio emission with flat radio-mm spectrum • Partially self-absorbed synchrotron from conical outflow(Blandford & Königl‘79; Hjellming & Johnston‘88; Kaiser‘06) • Jet interpretation confirmed by VLBI in Cyg X-1 & GRS 1915+105 (1e-2 LEdd) GRS 1915+105 Dhawan et al.’01 Fuchs et al.’03 Cyg X-1 Stirling et al.‘01

  3. Radio/X-ray correlation in hard state V 404 Cyg GX339-4 J1118+480 4U 1543-47 GS 1354-64 1E 1740.9 J1550-564 Cygnus X-1 J0422+32 GRS 1758-258 radio flux density - scaled to 1 kpc (mJy) LradioLx0.70.1 X-ray flux density - scaled to 1 kpc (Crab) Corbel et al. ‘03; Gallo, Fender & Pooley ‘03

  4. Radio/X-ray correlation in quiescence Simultaneous VLA/Chandra observations of A0620-00 (10 MSun BH at 10-8.5 LEdd) F8.5GHz = 51 ± 7 mJy Lowest radio luminosity measured for X-ray binary Interpreted as synchrotron emission from a persistent outflow Gallo et al. ‘06

  5. Radio/X-ray correlation in quiescence • A0620-00 • Lx=7x1030 erg/sec • Lradio=7x1026 erg/sec • Non-linear radio/X-ray correlation holds down to 10-8.5 LEdd • Quenched radio emission above 10-2 LEdd Gallo et al. ‘06

  6. Jet power via jet/ISM interaction Jet-powered radio nebula around Cygnus X-1 Gallo et al. ‘05, Nature

  7. Jet power via jet/ISM interaction Kaiser & Alexander ’97 104< Tbow< 2x106 Jet/ISM in pressure balance constant Pjet Pjet > 0.2 x 1037 erg /sec = 0.2 LX,bol

  8. Jet power via jet/ISM interaction Follow-up optical (ING) observations confirm the shock-compressed nature of the gas in the arc Refinement of shock velocity trough optical lines ratios gives: Pjet~ 0.5 LX,bol Russell, Fender & Gallo in prep.

  9. Cyg X-1 A0620-00 Jet power in quiescence

  10. Jets in quiescence A look with Spitzer Hard/quiescent state jets: optically thick-to- thin break in the mid-IR, thus Spizter IRAC/MIPS Muno & Mauerhan claim evidence for excess mid IR emission due to circumbinary material in 4 quiescent X-ray binaries Muno & Mauerhan ‘06

  11. Jets in quiescence A look with Spitzer Re-analysis of the MIPS data gives higher values/lower limits Jet interpretation for the mid-IR excess as likely (yet strictly simultaneous data required) Confirms prediction of jet spectral break near K band(Russell et al’06) Gallo et al., in preparation

  12. Jet power in quiescence A0620-00 Lacc = 6x1035 y (/0.1) erg/sec Pjet = 4x1035 erg/sec (derived from Lradio following Heinz & Grimm 2004) If Pjet comparable to Lacc then the jet must affect the dynamics of the accretion flow pure ADAF solutions thus ruled out

  13. Future work: quiescent super-massive black holes Large Chandra proposal (~450 ksec; PI: Treu) approved to observe 86 spheroidals in the Virgo cluster, covering the entire HST/ACS VCS (Cote’ et al.) Look for highly sub-Eddington accretion-powered nuclear emission (5.3 ksec/target with ACIS-S: sensitive down to Eddington for a neutron star) Plus: Spitzer (awarded) and possibly Keck and VLA Aim: to bridge the gap between inactive galaxies and AGN in a neat nearby sample

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