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A Multiwavelength Study of SNR 3C396

A Multiwavelength Study of SNR 3C396. Yang Su Purple Mountain Observatory yangsu@pmo.ac.cn Yang Chen (NJU) Ji Yang (PMO) Bon-Chul Koo (SRAO) Xin Zhou (NJU). 3C396 (G39.2-0.3): HI  D~6.5-9.6 kpc (Caswell et al. 1975) Spectral index~-0.49 (Anderson et al. 1993)

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A Multiwavelength Study of SNR 3C396

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  1. A Multiwavelength Study of SNR 3C396 Yang Su Purple Mountain Observatory yangsu@pmo.ac.cn Yang Chen (NJU) Ji Yang (PMO) Bon-Chul Koo (SRAO) Xin Zhou (NJU)

  2. 3C396 (G39.2-0.3): HID~6.5-9.6 kpc (Caswell et al. 1975) Spectral index~-0.49 (Anderson et al. 1993) ASCA X-ray (Harrus et al. 1999):

  3. VLA 1465MHz (Patnaik et al. 1990): Blow-out structure

  4. Left: Radio Grey & X-ray Contour; • Right: Chandra X-ray (Olbert et al. 2003) PWN: Index~1.5

  5. Red: H2 2.12um • Blue: [Fe II] 1.64um • Contour: Radio Lee et al. 2008 MS wind RSG wind The H2 shell is outside of the [Fe II] shell.

  6. Hewitt et al. (2009): 1, Multi-phase pre-shock ISM (atomic, molecular and dense gas); 2, C shock +C shock or C shock + J shock

  7. 0.5-8.0 keV Si~1.65-2.1 keV S~2.25-2.6 keV 3.0-7.0 keV

  8. R: Si (1.65-2.1keV) G: S (2.25-2.6 keV) B: continuum (3.0-7.0 keV) north Shell PWN SW Z>1 south Z~1

  9. Whole-PWN 35525 counts (NH~4.6E22cm-2,kT~1keV, Si,S~1&Ca>1)

  10. PWN 2733 counts(NH~4.7E22cm-2, kT~0.68keV)

  11. PWNOUT 4693 counts(NH~4.3E22cm-2, kT~1.9keV,Si,S,Ca~1)

  12. North 6010 counts(NH~4.9E22cm-2, kT~1.3keV,Si,S,Ca>1)

  13. South 3368 counts(NH~4.8E22cm-2, kT~1.0keV,Si,S,Ca>1)

  14. East 2380 counts(NH~4.6E22cm-2, kT~0.73keV,S>1)

  15. SW 2493 counts(NH~4.4E22cm-2, kT~0.66keV, Si,S~1)

  16. W-Shell 1530 counts (NH~5.8E22cm-2,kT~0.64keV, Si~1&S>1)

  17. Vnei for thermal X-ray gas • Power-law for non-thermal PWN emission

  18. The northeastern shell-like structure: 2’*3’ region Thick: 12CO(1-0)  The wing Thin: 13CO(1-0)*5  The main-body of MC 12CO(1-0): V~69.5 km/s FWHM~3.1 km/s 13CO(1-0): V~69.3 km/s FWHM~2.1 km/s

  19. 12CO-13CO*5 The subtracted image display the partial-shell structure. For the blue-shift of the 69 km/s

  20. For the red-shift of the 69 km/s

  21. Cavity-like structure Broad wing: 12CO: 65-68 km/s • Red: CO • Green: IR • Blue: X-ray Main body: 13CO: 68-72 km/s Left Contour: Radio Right Contour: IR

  22. Lee et al. (2008): 13CO Contour & Near-IR Grey

  23. For the tangent point (v~85 km/s)

  24. 69 km/s 85 km/s

  25. 69 km/s 85 km/s

  26. 3C396 (G39.2-0.3) R0=8kpc, v0=220km/s Position A B Velocity (km/s) 69 85 Distance (kpc) 8.1 6.2 CO data  69 km/s  85 km/s  8.1 kpc  6.2 kpc So, the SNR is likely near the tangent point or the far-side of the Sagittarius arm X-ray Spectral Fitting: N(H)~4.6e22(cm-2), n~2cm-3, D~7.4 kpc

  27. HI self-absorption?  Near point? Thick: 13CO(1-0)*100 & Thin: HI 69 km/s 85 km/s

  28. R: 13CO 83-86 km/s G: 24um IR B: X-ray Peak of X-ray, IR & radio: Interaction between SNR shock and MC

  29. L~1.0’~1.8 pc @6.2kpc D~0.2’~0.4 pc @6.2kpc e.g. Kes 75 e.g. Crab

  30. N(H)~3.1E21 cm-2 (16.3 arcmin at 6.2 kpc) • The Mass of the wind bubble: 3.6E3 Msun • n(R~3’~5.4pc)~450 cm-3 • r2(bubble)~8.0 pcRc~0.86*r2~6.8 pc • v2(bubble)~4.7 km/s • 1’@6.2kpc~1.8 pc Rc>Radius of SNR

  31. For the SW region: • X-ray: n~2.7 cm-3 P~8E-9 dynes cm-2 Vs~0.66 keV~740 km/s t~0.4R/Vs~3000 yr • IR: n~1E6 cm-2 or 1E4 cm-2 P~1E-6 dynes cm-2 or 1E-7 dynes cm-2 Chevalier (1999): Pressure enhancements of 10-100 times can occur when the SNR shell interacts with dense clumps.

  32. M(hot gas)~20-30 Msun; • M(MC)~ 4E3 Msun in half ball; Jet ? 500 counts Z>1 MC Peak of X-ray, IR & radio: Interaction between SNR shock and MC Blow-out Z~1 Z>1

  33. THANKS

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