Embed Size (px)
DESCRIPTION
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. - PowerPoint PPT Presentation
Citation preview
Radio and X-rays from GRS1915+105
- Close Correlations of the Third Kind
Ralph Spencer and Tony RushtonJBCA, The University of
Manchester
Alien!
PlateauLow/hard X-ray“C” state
FlaringSoftHigh or IntermediateState23 mas/day
10 years of monitoring
Date X-ray flare(MJD)
Motion mas/day
1998June09
50967 27±3
2003Mar06 52694 18 ±2
2003Apr18 52733 16.5 ±1
2003June15
52788 or52792
17.5 ±123.5 ±1
14 Merlin runs - 4 have extended jets following an X-ray flare
See Rushton et al MNRAS 2010
1996 2006
Hardness
X-ray counts
Ryle radio
1999 2005
Rushton et al 2010 in prep.
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!
Questions ?
