RCW86, Vela Jr., W28 に付随する分 子雲 福井 康雄 March 13, Nagoya

NANTEN & Campanas, alt.2400m

RCW 86 (G315.4 – 2.3)

人類が記録した最古の SNR ( AD 185 ) –Age ~ 2000 yr SNR までの距離 ～ 2.8 kpc ASCA の観測 ( Bamba et al 等 ) –SW, NE の rim から、シンクロトロン X 線を検出 – ショックで加速された電子起源 Suzaku の観測 ( Yamaguchi et al. 2008) –NE 領域で硬 X 線 –East 領域で Fe-K 線、軟 X 線 (thermal 成分 )

(Yamaguchi et al.2008) Contour KeV Image Fe-K map Contour KeV Image Fe-K map

Integrated intensity of 12CO(J=2-1) Left: NANTEN2 12CO(J=2-1) integrated intensity of the RCW86 region for Vlsr = -40 to -33 km/s with 843MHz significance contours overlaid (white). Lowest contour is 0.01 Jy/Beam and interval is 0.02 Jy/Beam. Right: Typical profile example of the 12CO(J=2-1) emission. The velocity scale is form -75 to 5 km/s. Red squares are observing region at 12CO(J=2-1) line. -40km/s - -33km/s

Left: NANTEN2 12CO(J=2-1) integrated intensity of the RCW86 region for Vlsr = -60 to -50 km/s with 843MHz significance contours overlaid (white). Lowest contour is 0.01 Jy/Beam and interval is 0.02 Jy/Beam. Right: Typical profile example of the 12CO(J=2-1) emission. The velocity scale is form -75 to 5 km/s. Red squares are observing region at 12CO(J=2-1) line. Integrated intensity of 12CO(J=2-1) -60km/s - -50km/s

12CO(J=2-1) vs suzaku image: 12CO(2-1) integrated intensity for Vlsr = -33 to -40 km/s with suzaku significance contours overlaid (red). -40km/s - -33km/s

Integrated intensity ratio image: 12CO(2-1)/(1-0) integrated intensity ratio. Integrated velocity range is km/s. Left image contour: 12CO(J=1-0) integrated intensity. Lowest contour is 2 K km/s. contour intervals are 2 K km/s Right image contour: 843MHz radio continuum. Lowest contour is 0.01 Jy/Beam. contour intervals are 0.02 Jy/Beam.

Integrated intensity ratio image: 12CO(2-1)/(1-0) integrated intensity ratio. Integrated velocity range is km/s. Left image contour: 12CO(J=1-0) integrated intensity. Lowest contour is 2 K km/s. contour intervals are 2 K km/s Right image contour: 843MHz radio continuum. Lowest contour is 0.01 Jy/Beam. contour intervals are 0.02 Jy/Beam.

Vela Jr.

Molecular clouds toward G AXJ V LSR = km/s H Column density (Exclude HI contribution) X-CO anticorrelation in Eastern part ↓ Possible absorption by VMR component Distance of VMR = 700±200 pc (Liseau 1992)

CO Integrated Intensity Velocity range = - 4 km/s - + 2km/s ・ Image: HESS Gamma Ray Image (F.Aharonian et al. 2007) ・ Contour: CO(J=1-0) (NANTEN) min:1(K ・ km/s) interval:1(K ・ km/s) Black contour: X-ray observation (by Suzaku telescope) Min.contour=15K ・ km/s Interval=15K ・ km/s

SNR RXJ (Vela Jr.) ・距離 1kpc 、年齢は数千年の type 2 の SNR であると推定されている。 (2005 川瀬修論 ) ・ HESS によって TeVγ 線が受かっている SNR の一つ。 ・ TeVγ 線の放射起源を調べるために、 NANTEN2 を用いて今期 12CO(J=2-1) の観測を行った。

・ composite or mixed-morphology SNR ・ dimension 50’×45’ and estimated distance between 1.8 and 3.3 kpc ・ Old-age SNR(age to yr) ・ There are γ-ray sources and HII region in the surroundings. surroundings Three-color images from VLA 90cm(blue), MSX 8 um (red), and SGPS+VLA 20 cm (green). Brogan et al.(2006) Contours are VHE γ-ray observed by H.E.S.S. -levels 4, 5, 6σ. Aharonian et al.(2007)

12CO(J=2-1) spectrum