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

(BERKELEY ILLINOIS MARYLAND ASSOCIATION CO Survey of Nearby Galaxies) BIMA SONG (BERKELEY ILLINOIS MARYLAND ASSOCIATION CO Survey of Nearby Galaxies)

(Owens Valley Radio Observatory ) OVRO (Owens Valley Radio Observatory )

Plateau de Bure Interferometer IRAM Plateau de Bure Interferometer

Nobeyama mm Array NMA

CO-Line： No Extinction Central Concentration High Velocity Resolution High Spatial Resolution High Sensitivity

d=1 pc d=1 pc 45m Milky Way Galactic Center D = 10 kpc Θ=15” NMA Virgo Cluster Galaxies D = 16 Mpc Θ=1” d=100 pc ALMA Nearby Cluster Galaxies D = 10 - 20 Mpc Θ=0.01” d=1 pc

NGC 3079

PV Diagram HI (Irwin & Seaquist 91) CO (NMA)

超高密度分子コア 100 pc 銀河系と比較

Virgo central rotation curves Nearby gal. Nuclear steep rise = Universal ! Discussion: “Single Peaks” vs “Twin Peaks” Twin Activity Ico,center

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”

Accretion-Activity Cycle “Single peaks” Accretion-Activity Cycle Pre-burst accretion S-peak, mol. core Post-burst Burst, Activity Gas exhaust. (Ho et al. 1997 ApJ.S.,112, 315)

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) 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 Peak” preburst [4] Start burst/AGN

Conversion X Anomaly X < 0 Conversion X Anomaly X < 0.1 x 1020 H2 / K km-1 Metallicity Temperature

ALMA Mappping (1pc=0. 01”) Detailed distribution/Dynamics of ISM in M 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。

V NMA to ALMA connection