W4 West(AFGL 333)領域における
アンモニア分子輝線観測
副島隆史 (大分大学M2)
仲野誠（大分大学）
面高俊宏, 半田利弘, 亀﨑達也, Ross Burns, 馬場達也,
松尾光洋, 宮崎竜之介, 吉田友哉（鹿児島大学）
永山匠, 砂田和良, James Chibueze, 久野成夫（NAOJ）
31th NRO Users Meeting (2013)
Introduction
W3 Main
W4
W3
• Interaction HII region with
molecular cloud
AFGL333-Ridge
• W3/W4 HII region
W3(OH)
- High density layer
- - W3Main, W3(OH), AFGL333
• AFGL333-Ridge
(Rivera-Ingraham et al. 2013)
- 2.0 kpc (Xu et al. 2006)
- chemical properties of massive
clumps (Sakai et al. 2007)
Fig.1. Optical image by Roger Rao
Fig.2. IR image by Spitzer IRAC
Observations – Backup program
 Instruments
• NRO 45m telescope
• H22 + SAM45
 Period
• 2013/1/26 – 2013/6/11 (total ~ 135 h)
 Lines
• NH3(J,K) = (1,1), (2,2), (3,3) and H2O maser
- velocity resolution ~ 0.38 km/s
- HPBW ~ 73’’
 Method
• 1grid=37.5”×37.5”, total 267 positions
• NewStar – Noise level Trms ~ 0.043 K
Results
- dent in the east
BRC
maser
dent
• BRC (SFO 05)
- northeast
 H2O
• 2 H2O masers
- one is newly detected
Fig.3. NH3(1,1) Integrated intensity map
(K km/s)
 NH3
• Main cloud
- 11.8’×6.2’ (6.9×3.6 pc)
Results
(K km/s)
Ta(K)
(km/s)
Fig.4. observed spectra in the NH3
• τ = 0.63 ± 0.14
• Trot = 16.1 ± 0.4 [K]
• N(NH3) = 1.55×1015 [cm-2]
• R = 0.9×2.9 [pc]
• MLTE = 2600 M☉, Mvir = 1800 M☉
Fig.5. The black eclipse shows the extent
obtained N(NH3)
Results
30
3.0
28
2.5
26
22
20
1.5
18
16
1.0
14
Fig.6. Velocity width map
Fig.7. Rotational temperature map
• Broad velocity width - east
• High temperature - north, east
(K)
2.0
(km/s)
24
Discussion
Broad velocity width and high Trot in the east
1.4GHz (CGPS)
IRAS 02244+6117
• 2 clusters
b (degree)
- IRAS 02245+6115
- IRAS 02244+6117
• IRAS 02245+6115
IRAS 02245+6115
- B0.5 star
- compact HII region
(Hughes & Viner 1982)
Fig.8. IR image of the AFGL333-Ridge (left). The green
contour shows the extent of the compact HII region (right).
Discussion
Broad velocity width and high Trot in the east
3.0
Cluster
position
Center
position
2.0
1.5
1.0
l (degree)
Fig.9. The relation of HII region to velocity-width
(km/s)
b (degree)
2.5
Fig.10. The relation of HII region to Trot
• Broad velocity width and
high Trot and in the east
would be originated with
compact HII region.