2009年3月1日鹿児島大学
共同研究者： 上野宗孝、猿楽祐樹、臼井文彦、
Hong Seung Soo、Pyo Jeonghyun、Yang Hongu

Poynting-Robertson効果によるダストの寿命
Mann et al. A&A Rv, 13, 3, 159-228

黄道光 b
Pictoris (V=3.85 )

Kalas et al. 2005

Wyatt 2008

Chap 4. THE IPD CLOUD REVEALED TO AKARI
1) AKARI MAPS OF ZE BRIGHTNESS
AKARI L18W ZE map after bands being removed ;
0 o .5 x 0 o .5 resolution

The Sky Observed by AKARI S9W-band
Leading direction
Trailing direction

The Sky Observed by AKARI L18W-band
Leading direction
Trailing direction

3) SEASONAL VARIATION OF POLE BRIGHTNESS
Causes: symmetry plane tilt
Earth eccentricity off-centering of IPD cloud

1.E-04
1.E-05
1.E-06
1.E-07
1.E-08
1.E-09
1.E-10
0.1
Zodiacal Component
Faint Stars
Airglow mission
CMB
Cirrus
1 10 100
Wavelength (É m)
夜空の明るさ（Leinert et al. 1998）
1000 10000

明け方 真夜中 夕方
黄極（北）
黄道面
Intensity map of zodiacal light by WIZARD
黄極（南）

Scattering phase function of the interplanetary dust
Hong (1985).
I
0 phase angle:
 scattering angle:

F (

) I
0

Venus i=3.4°  =77°
Mars i=1.9°  =50°
Jupiter i=1.3°  =101°
Saturn i=2.5°  =114°

Giese, Kneissel and Rittich 1986

ST-7
ST-9
CCD format Resolution
756

510
(4.6mm

6.9mm)
512

512
(10.2mm

10.2mm)
5.8'/pix (0.2R

)
8.6'/pix (0.3R

)
Field-of-view
33
73


49
73


Readout time
( more than?
) 11 sec
11 sec?

ST-7 + 8mm-fisheye
ST-9 + 8mm-fisheye

Predicted Morphology of the Zodiacal Light on July 22
3.16

10 6 S
10 
1.00

10 6 S
10 
3.16

10 5 S
10 
1.00

10 5 S
10 
3.16

10 4 S
10 
1.00

10 4 S
10 
3.16

10 3 S
10 
1.00

10 3 S
10 

-


(

)
Spatial distribution: Kelsall el al. (1998)
Scattering phase function: Hong (1985)

•
Observation site:
•
Predicted time for the total eclipse:
•
Solar ecliptic longitude:
•
Solar elevation:
135

E, 28

N
11:06:25-11:13:05 JST


=119

25 m 30 s
75


– SBIG ST-9
– SBIG ST-7 
2
Nishi-Harima observatory
– Nikon 8mm fish-eye
Amateurs' privately-owned
– Nikon 16mm fish-eye
– Nikon 24mm wide-field …
– Johnson/Kron-Cousins (B,V,Rc,Ic), ECAS (b-z)