RCW86, Vela Jr., W28に付随する分子雲
福井 康雄
March 13, Nagoya
NANTEN & NANTEN2
@Las Campanas, alt.2400m
@Atacama, alt.4800m
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 0.5-1.0KeV
Image Fe-K map
Contour 3.0-6.0KeV
Image Fe-K map
Integrated intensity of 12CO(J=2-1)
-40km/s - -33km/s
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.
Integrated intensity of 12CO(J=2-1)
-60km/s - -50km/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.
12CO(J=2-1) vs suzaku
-40km/s - -33km/s
image: 12CO(2-1) integrated intensity for Vlsr = -33 to -40 km/s with suzaku
significance contours overlaid (red).
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
H Column density
(Exclude HI contribution)
X-CO anticorrelation
in Eastern part
↓
Possible absorption
by VMR component
AXJ0851.9-4617
Distance of VMR =
700±200 pc (Liseau 1992
VLSR = -3 - +25 km/s
CO Integrated Intensity
Velocity range = - 4 km/s - + 2km/s
Black contour:
X-ray observation
(by Suzaku telescope)
Min.contour=15K・km/s
Interval=15K・km/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)
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。
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)
・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.
12CO(J=2-1) spectrum