Transcript 石黒 正晃

2009年3月1日鹿児島大学
皆既日食中の太陽近傍黄道光の観測
石黒正晃（国立天文台）
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 ;
0o.5 x 0o.5 resolution
The Sky Observed by AKARI S9W-band
Leading direction
Trailing direction
The Sky Observed by AKARI L18W-band
Leading direction
Trailing direction
Resonance Ring around the Sun at 1 AU
3) SEASONAL VARIATION OF POLE BRIGHTNESS
Causes:
symmetry plane tilt
Earth eccentricity
off-centering of IPD cloud
Zodiacal Component
Faint Stars
Airglow mission
CMB
Cirrus
1.E-05
S k y B rig h tn ess (W m
1
)
-2
sr
-
1.E-04
1.E-06
1.E-07
1.E-08
1.E-09
1.E-10
0.1
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
黄極（南）
Intensity map of zodiacal light by WIZARD
F() x constant
Scattering phase function of the interplanetary dust
Hong (1985).
I0
phase angle: 
scattering angle:

F()I0
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
Field-of-view
Readout time
756510
5.8'/pix (0.2R)
3349
(more than?) 11 sec
8.6'/pix (0.3R)
7373
11 sec?
(4.6mm6.9mm)
512512
(10.2mm10.2mm)
ST-7 + 8mm-fisheye
ST-9 + 8mm-fisheye
Predicted Morphology of the Zodiacal Light on July 22
b ()
3.16106 S10
1.00106 S10
3.16105 S10
1.00105 S10
3.16104 S10
1.00104 S10
3.16103 S10
1.00103 S10
- ()
Spatial distribution: Kelsall el al. (1998)
Scattering phase function: Hong (1985)
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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25m30s
75
Available Instruments
• CCD
– SBIG ST-9
– SBIG ST-7  2
Nishi-Harima observatory
Amateurs' privately-owned
• Lens
– Nikon 8mm fish-eye
– Nikon 16mm fish-eye
– Nikon 24mm wide-field …
• Filter
– Johnson/Kron-Cousins (B,V,Rc,Ic), ECAS (b-z)