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Transient X-ray Binaries In Centaurus A

Transient X-ray Binaries In Centaurus A. Gregory R. Sivakoff ( UVa ) Chandra Cen A- Very Large Project Team. A Galaxy’s Cookbook A Population of X-Ray Binaries Start With A Galaxy’s Stellar IMF # NSs/BHs Stir In Stellar Dynamics # Binaries Form

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Transient X-ray Binaries In Centaurus A

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  1. Transient X-ray Binaries In Centaurus A Gregory R. Sivakoff (UVa)Chandra CenA-Very Large Project Team July 15, 2010: Accretion WorkshopCambridge, Massachusetts

  2. A Galaxy’s Cookbook A Population of X-Ray Binaries • Start With A Galaxy’s Stellar IMF • # NSs/BHs • Stir In Stellar Dynamics • # Binaries Form • Bake With Stellar Evolution & Binary Evolution For A Few Million/Billion Years • # HMXBS/LMXBs Form • Top With Accretion Physics • # XRBs Emitting At A Given LX July 15, 2010: Accretion WorkshopCambridge, Massachusetts

  3. X-ray Binary Variability • Soft X-ray Transients • Disk Instability + Irradiation + Disk Size King 2006 July 15, 2010: Accretion WorkshopCambridge, Massachusetts

  4. X-ray Binary Variability • Soft X-ray Transients • Disk Instability + Irradiation + Disk Size • Most Outbursts Are Short, But Some > 10 yr • (e.g., GRS1915, KS1731) GX339-4 Aql X1 EXO1745-248 1×1038 LX,0.3-10 kev (erg/s) 5×1037 2001 2003 2001 2003 2001 2003 Year Mar. 4, 2010: HEAD Meeting, Waikoloa, Hawaii

  5. Galactic/Extragalactic Studies ofXRBs are Complementary July 15, 2010: Accretion WorkshopCambridge, Massachusetts

  6. July 15, 2010: Accretion WorkshopCambridge, Massachusetts

  7. 2000 May 17 2007 May 08 2007 May 30 2002 Sep 03 2003 Sep 14 1999 Dec 05 2007 Mar 27 2007 Mar 22 2007 Mar 30 2007 Apr 17 Mar. 4, 2010: HEAD Meeting, Waikoloa, Hawaii

  8. The Importance Of Being Variable Steep Power Law State Thermal State Sivakoff et al. 2008 + Updates July 15, 2010: Accretion WorkshopCambridge, Massachusetts

  9. GX 339-4 Like Sources? July 15, 2010: Accretion WorkshopCambridge, Massachusetts

  10. But, Persistence Dominates July 15, 2010: Accretion WorkshopCambridge, Massachusetts

  11. … In Many Galaxies NGC 4697: Sivakoff et al. NGC 4365: Sivakoff et al. Accretion Processes in X-Rays:From White Dwarfs to Quasars

  12. … In Many Galaxies Accretion Processes in X-Rays:From White Dwarfs to Quasars

  13. Where Do We Go From Here? • Fainter Sources, Month-Year Timescales • Brighter Sources, Decade Timescales XLF of 14 E/SOs: Kim & Fabbiano 2003 Accretion Processes in X-Rays:From White Dwarfs to Quasars

  14. Where Do We Go From Here? Chandra X-ray Observatory • Fainter Sources, Month-Year Timescales • Brighter Sources, Decade Timescales Accretion Processes in X-Rays:From White Dwarfs to Quasars

  15. Where Do We Go From Here? LX,0.3-10 kev (erg/s) • Fainter Sources, Month-Year Timescales • Bright Sources, Decade Timescales • Week Timescales AQL X-1 1×1038 5×1037 2001 2003 Year Accretion Processes in X-Rays:From White Dwarfs to Quasars

  16. Where Do We Go From Here? Wide FieldX-ray Telescope • Fainter Sources, Month-Year Timescales • Bright Sources, Decade Timescales • Week Timescales Accretion Processes in X-Rays:From White Dwarfs to Quasars

  17. Take-Away Points • There Is A Wealth Of XRB Data In Cen A • Variability Reveals Black Hole Candidates • Sources Largely Persistent • Sources Largely NS XRBs? • Missing Short Timescale Transient XRBs? • BH XRBsAre Long Timescale Transients? • Accretion Theory Is Missing Something? July 15, 2010: Accretion WorkshopCambridge, Massachusetts

  18. Thank You Thank You July 15, 2010: Accretion WorkshopCambridge, Massachusetts

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