Virgo CO Survey of Molecular Nuclei Yoshiaki Sofue Dept. Phys Virgo CO Survey of Molecular Nuclei Yoshiaki Sofue Dept.Phys., Meisei Univ. @ALMA WS Nearby Galaxies, NAOJ 2011 Feb. 10

GAMMA Project with ALMA Virgo Galaxy MAss MApping ー銀河Dynamics空白地帯を埋めるー

技術、サイエンス

ALMA時代の銀河研究 １．日米欧：敵情を知れ。 ２．ALMAは干渉計である。 3. NMAでの研究を基盤、正面突破 (本質的にマッピングマシンである。） 3. NMAでの研究を基盤、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 /CARMA (Owens Valley Radio Observatory )

Plateau de Bure Interferometer IRAM Plateau de Bure Interferometer

Nobeyama mm Array NMA

Visible from ALMA! Why Virgo? Cepheid Distance 16 Mpc CO rich Spirals All-wave Atlases (Opt, Radio, HI, IR, FIR, X) Visible from ALMA!

1. Nuclear Dynamics & Massive cores

NGC 3079 RAINBOW RB+C+D RB

NGC 3079 P-V Diagram: HI vs CO HI (Irwin & Seaquist 91) CO (NMA)

NGC 3079 CO PVD　→ RC　→ Mass Distribution

質量分布ー直接導出 > >

Surf. Mass Density Massive Core Bulge Disk Dark Halo

Black hole connection NGC 3079

2. “Single peak” vs “Twin peaks” Nuclear ISM Physics

V ”Twin” to “Single”

“Single peaks”

Molecular Nucleus (Single Peaks） Rate BIMA. 5”. 32% (14/44) NMA-OV. 4” Molecular Nucleus　 (Single Peaks） Rate BIMA 5” 32% (14/44) NMA-OV 4” 40% (8/20) Virgo 3” 33% (5/15) NMA Unifo 1.5” 66% (4/6)

3. Uniform wt maps in place for RAINBOW

Ico=5660 K km/s-1 　

4. ISM Physics of S-peaks

Single Peaks Ico > 500 K km/s N(H2) > 1023 H2 cm-2

超高密度分子コア 100 pc 銀河系と比較

High-Density Molecular Core in R~100 pc (if conv. X=1x1020 H2/ K km-1) High-Density Molecular Core in R~100 pc (if conv.X=1x1020 H2/ K km-1) Column Density N(H2) > 1023 H2 cm-2 Gass Mass M(H2) ~ Several108 Msun Dynamical mass ~ 109 Msun Schimidt Law

SFR∝Σ1.0(gas) (Schimidt law) (Komugi et al. 2004) X X X X X N3079

SFR=Schmidt / Starburst [1] Bar accretion “Twin peaks” + Ring Temporary [2] Feeding Nuclei [3] Nucl. Mol. Core, “Single Peak” Stationary SFR=Schmidt / Starburst

質量空白域 or DM cusp Rc

銀河質量研究の空白領域 BH - Bulge Log R

BH – Bulge – Disk 　 NGC 3079

BH formation in core/cusp Rc

作業仮説 Flat RC (Isothermal) beyond BH.

MBH ～ MG0.9 Log MBH～-1.8MB,disk

Log MBH ～ -1.8 MB,disk Log MBH MB,Bulge MB,disk Kormendy 2000

１．野辺山、ＡＬＭＡ 回転曲線 ２．質量分布 ３．銀河研究の空白地帯 ４．対数回転曲線 　　１．野辺山、ＡＬＭＡ　回転曲線 ２．質量分布 ３．銀河研究の空白地帯 ４．対数回転曲線 　

d=1 pc d=1 pc NMA Virgo D = 16 Mpc Θ=1” d=100 pc 45m Milky Way D = 10kpc Θ=15” d=1 pc ALMA Virgo D = 16Mpc Θ=0.01” d=1 pc