X-ray binaries and CXB

1
X-ray binaries and CXB

• Marat Gilfanov, Igor Prokopenko Rashid Sunyaev.
• MPA (Garching), IKI (Moscow)

2
X-ray binaries
HMXB - star formation
LMXB - stellar mass
3
X-ray binaries cosmic SF
Cosmic star formation
stellar mass
(from Nagamine et al., 2006)
4
This work - broad-band view
Previous work

• Bookbinder et al., 1980Griffiths Padovani,
  1990Moran, Lehnert Helfand, 1999
• Ghosh White, 2001and othersRanalli, Comastri
  Setti, 2005

CXB spectrum
?
X-ray binaries
5
HMXB

• SFR(z) from Hopkins Beacom06, Nagamine et
  al.06
• H070, ?M0.3, ??0.7
• consistent calibrations of SFR indicators
  (Bell03, Hopkins03,04)
• cosmic SFH
• Lx-SFR relation for HMXB
• consistent Lx-SFR from Grimm et al, 2003
  Ranalli et al.,2003
• SFR 0.1-100 Msun,
  Salpeter IMF

6
HMXB - spectra
HMXB spectra
HMXB luminosity function
HMXB pulsars
Black holes
ULX
Swartz et al., 2004
10 HMXB pulsars 20 BH 70 ULX
7
LMXB

• binary evolution ?1 Gyrs
• LMXB luminosity functionmain contribution
• brigth NS LMXBs (Z-sources)
• BH transients
• - ?

LMXB XLF
8
Contribution to CXB
2-10 keV HMXB 7-10 LMXB lt1-2

• ltzHMXBgt 1.5
• ltzLMXBgt 0.5

9
HMXBs unresolved part of CXB

• HMXB contribution can explain 50 of the
  unresolved part of the CXB (via contribution of
  faint normal galaxies)

10
Conclusions

• robust estimate of HMXB contribution to
  CXB7-10 in the 1-10 keV band
• significant contribution to unresolved CXB but
  insufficient to explain all of it
• LMXB contribution lt 1-2