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Radio and X-rays from GRS1915+105

Alien!. Radio and X-rays from GRS1915+105. Close Correlations of the Third Kind Ralph Spencer and Tony Rushton JBCA, The University of Manchester. Type 1. Type 2. Plateau Low/hard X-ray “C” state. Flaring Soft High or Intermediate State 23 mas/day. 10 years of monitoring.

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Radio and X-rays from GRS1915+105

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  1. Alien! Radio and X-rays from GRS1915+105 Close Correlations of the Third Kind Ralph Spencer and Tony Rushton JBCA, The University of Manchester

  2. Type 1 Type 2 Plateau Low/hard X-ray “C” state Flaring Soft High or Intermediate State 23 mas/day

  3. 10 years of monitoring

  4. 14 Merlin runs - 4 have extended jets following an X-ray flare Type 1 See Rushton et al MNRAS 2010

  5. Hardness X-ray counts Ryle radio 1996 2006

  6. Type 2 !

  7. 1999 2005 Type 3 ? Rushton et al 2010 in prep.

  8. Summary • Type 1: • Relativistic jets ejected following a state change and X-ray flare – related to disc formation and evolution • Apparent velocity varies – angle change? • Type 2: • Close correlation with X-rays in plateau state: strong coupling between accretion (ADAF) and radio strength (unlikely) or X-rays from same electrons (synchrotron?) • Type 3 • Long term (~1 yr) cyclic behaviour – thermal timescale of equatorial disc? Magnetic dynamo timescale of companion? Synodic variations due to a 3rd body? Mystery!

  9. Questions ?

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