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

• Interaction HII region with molecular cloud

• W3/W4 HII region - 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)

W4

AFGL333-Ridge

W3(OH)

W3 Main

Fig.1. Optical image by Roger Rao

Fig.2. IR image by Spitzer IRAC

W3

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

Observations – Backup program

NH3

• Main cloud - 11.8’×6.2’ (6.9×3.6 pc) - dent in the east• BRC (SFO 05) - northeast

H2O• 2 H2O masers - one is newly detected

Results

dent

BRCmaser

Fig.3. NH3(1,1) Integrated intensity map

(K k

m/s

)

preliminary

(K k

m/s

)

Fig.5. The black eclipse shows the extent obtained N(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.4. observed spectra in the NH3

Ta(K)

(km/s)

Results

preliminarypreliminary

• Broad velocity width - east• High temperature - north, east

Results

Fig.7. Rotational temperature map Fig.6. Velocity width map

30

28

26

24

22

20

18

16

14

(K)

2.5

1.5

1.0

3.0

2.0

(km

/s)

preliminary

preliminary

Discussion Broad velocity width and high Trot in the east

• IRAS 02245+6115 - B0.5 star - compact HII region (Hughes & Viner 1982)

• 2 clusters- IRAS 02245+6115- IRAS 02244+6117

Fig.8. IR image of the AFGL333-Ridge (left). The green contour shows the extent of the compact HII region (right).

IRAS 02244+6117

IRAS 02245+6115

b (d

egre

e)

1.4GHz (CGPS)

preliminary

b (d

egre

e)

l (degree)

• Broad velocity width and high Trot and in the east would be originated with compact HII region.

Fig.9. The relation of HII region to velocity-width

Fig.10. The relation of HII region to Trot

2.5

1.5

1.0

3.0

2.0

(km

/s)

Discussion Broad velocity width and high Trot in the east

Clusterposition

Centerposition

preliminary

preliminary