RCW86, Vela Jr., W28 に付随する分子雲

福井　康雄March 13, Nagoya

NANTEN & NANTEN2

@Atacama, alt.4800m@Las 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. 2000 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 0.5-1.0KeVImage Fe-K map

Contour 3.0-6.0KeVImage 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 -40 - -33 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 -60 - -50 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 G266.2-1.2

AXJ0851.9-4617

VLSR = -3 - +25 km/s

H Column density

(Exclude HI contribution)

X-CO anticorrelation in Eastern part

↓Possible absorptionby VMR component

Distance of VMR = 700±200 pc (Liseau 1992)

CO Integrated IntensityVelocity 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 RXJ0852.0-4622(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 35000 to 150000 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