RC Nearby mission

Virgo Survey:
Single Peak Galaxies
• 祖父江義明
• U. Tokyo
ALMA時代の銀河研究
１．日米欧干渉計事情
２．ALMAは干渉計
3. NMAからの正面突破
BIMA
(BERKELEY
CO
SONG
ILLINOIS MARYLAND ASSOCIATION
Survey of Nearby Galaxies)
OVRO
(Owens
Valley Radio Observatory )
IRAM
Plateau de Bure Interferometer
Nobeyama mm Array
NMA
No Extinction
CO-Line：
Central Concentration
High Velocity Resolution
High Spatial Resolution
High Sensitivity
45m
Milky Way
Galactic
Center
NMA
Virgo
Cluster
Galaxies
ALMA
Nearby
Cluster
Galaxies
D = 10
kpc
Θ=15”
D = 16
Mpc
Θ=1”
D = 10 - 20
Mpc
Θ=0.01”
d=1 pc
d=100 pc
d=1 pc
NGC 3079
PV
Diagram
HI (Irwin &
Seaquist 91)
CO (NMA)
超高密度分子コア
100
銀河系と比較
pc
Virgo central rotation curves
300
Virgo
V (km/s)
300
V (km/s)
200
200
100
100
0
0
10
20
X (kpc)
-100
-200
-300
-3
0
Nearby gal.
-2
-1
0
1
2
3
X (kpc)
Nuclear steep rise = Universal !
30
Surf. Mass Density
• Core
• Bulge
• Disk
• Halo
ALMA RC (1pc=0.01”)
(1) Detailed RC 1 – 100 pc
(2) Mass Distribution
1-100 pc, BH-connection
“Speak” vs “Twin”
”Twin”
to
“Single”
“Single peaks”
AccretionActivity Cycle
Gas exhaust.
Burst,
Activity
Post-burst S-peak,
mol. core
Pre-burst accretion
Ico=5660 K km/s-1
303 K km/s-1
744 K km/s-1
246 K km/s-1
337 K km/s-1
762 K km/s-1
Single Peaks
Ico > 500 K km/s
High-Density Molecular Core
for usual Conv.X (1x1020 H2/ K km-1)
N(H2) > 1023 H2/cm2
M(H2) ~ a few 10^8 Msun
(cf Mdyn ~ 10^9 Msun)
SF surpresed=Preburst core
[1] Bar accretion
“Twin
peaks” + Ring
[2] Feeding Nuclei
[3] Nucl. Mol. Core,
“Single
[4] Start
Peak” preburst
burst/AGN
Conversion X Anomaly
X < 0.1 x
20
10
Metallicity
Temperature
H2 / K
-1
km
ALMA
Mappping (1pc=0.01”)
Detailed distribution/Dynamics
of ISM in M.Cores 1 – 100 pc
Higher Transitions & Various
Species in Sub-mm
ISM Physics/Chemistry
ALMA時代の銀河研究
１．銀河の骨格、基幹構造の研究
２．極限状態での星間物理と活動
３．密度波、銀河衝撃波、
ＧスケールＳＦの見直し
ALMA時代の銀河研究
２００３－２００７
１．日米欧：敵情を知る。
２．ALMAは干渉計である。
NMAを基艦に正面突破。
NMA to
ALMA
connection
V

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