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TWO TOPICS IN X-RAY ASTRONOMY WITH XEUS- microquasars and stellar flares

TWO TOPICS IN X-RAY ASTRONOMY WITH XEUS- microquasars and stellar flares. HESA, Observatory Univ Helsinki. Grs1915 binary. shooting. Mirabel et al. Flip-flop. Relativistic Iron line.

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TWO TOPICS IN X-RAY ASTRONOMY WITH XEUS- microquasars and stellar flares

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  1. TWO TOPICS IN X-RAY ASTRONOMY WITH XEUS- microquasars and stellar flares HESA, Observatory Univ Helsinki xeus-science October 2004/ O. Vilhu

  2. Grs1915 binary xeus-science October 2004/ O. Vilhu

  3. shooting Mirabel et al. xeus-science October 2004/ O. Vilhu

  4. Flip-flop xeus-science October 2004/ O. Vilhu

  5. Relativistic Iron line • is a most intresting high gravity probe when the inner disc is closest to the BH and the corona (reflection component) just touches the inner disc = high soft state • The blue horn is sharp but does it require calorimeter resolving power ? • gives a baseline for AGN’s xeus-science October 2004/ O. Vilhu

  6. NARROW LINES IN GRS1915+105 xeus-science October 2004/ O. Vilhu

  7. ASTRO-E2 50 KSEC (simulation) lines from CHANDRA observation (Lee et al.), variable within 10 ksec xeus-science October 2004/ O. Vilhu

  8. ORIGIN OF LINES ? Outflow, disk wind, origin of jet formation xeus-science October 2004/ O. Vilhu

  9. BUT here is a problem: • BRIGHT GALACTIC ONE CRAB SIZE SOURCES (e.g. grs1915,gx339,cygx-3, transients) HAVE HIGH XEUS COUNT RATES 10 4 - 10 5 CPS. • HENCE, NEED TO • 1. USE A MOVABLE FILTER TO CUT LOW ENERGIES or • 2. DEVELOPE FAST COUNTING CAPABILITY or • OBSERVE FAINTER SOURCES IN OTHER GALAXIES, LIKE ULX’s and LMC sources and • 4. OBSERVE HIGHLY ABSORBED NEW INTEGRAL IGR SOURCES and use bright microquasars as a guide xeus-science October 2004/ O. Vilhu

  10. Solar flare May 2004 Huovelin Alha Väänänen XSM/SMART-1 1.5 HOUR DYNAMICAL SPECTRUM RHESSI IMAGE 1ARCSEC = 700 KM TIME 20 0 ENERGY (keV) Fe K EW < 1 KEV xeus-science October 2004/ O. Vilhu

  11. Fe K : sensitive for log(n) > 16 cm-3 forbidden line • Sigma2CrB ASTRO-E2 simu 20 ksec xeus-science October 2004/ O. Vilhu

  12. MgXI and OVII CHANDRAactive stars 100 ksec Testa et al astroPH-0405018 forbidden line MgXI log(n) > 12.7 log(n) > 10.5 OVII xeus-science October 2004/ O. Vilhu

  13. XEUS/XSM-estimate, active star at 10 pc: • at max xeus-counts/16 sec = 1.e5 * (1.5e13/2e19)**2 (10m2/1mm2) * 10000. = 0.025*1e5 = 2500 xeus-science October 2004/ O. Vilhu

  14. XEUS/CHANDRA-estimate XEUS exposure time for MgXI and OVII of closeby active stars: 100 ksec * (10 – 200 cm2)/10 m2 = 0.1 ksec OK for flares ! xeus-science October 2004/ O. Vilhu

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