Science with ALMA
Archive
Masa Hayashi (NAOJ)
East Asia ALMA Science Workshop, Korea (July 14, 2014)
2
Archive Science
• Masa Hayashi (NAOJ): Science with ALMA
Archive
• Aya Higuchi (Ibaraki): Science case with ALMA
archive
• Tohru Nagao (Ehime): Extragalactic Studies
with ALMA Archival Data
• Erik Muller (NAOJ): Using ALMA Archive; ALMA
Science Archive substructure and operation
3
ALMA Status
ALMA: a giant array of 66 antennas
incl. ACA (Morita array) with four 12-m total power antennas
45 Antennas
ALMA (ESO/NAOJ/NRAO), S. Komugi (NAOJ/ALMA)
band4
band8
band10
4
Science Capabilities
Cycle 0 (2011-2013)
 >16 x 12m antennas
 Bands 3 (3.1mm), 6 (1.3mm), 7 (0.87mm), 9 (0.44mm)
 Max 400 m baseline (~0.3″ resolution)
Cycle 1 (2013-2014)
 32 x 12m antennas
 ACA (9 x 7m, 2 x 12m TP antennas)
 Bands 3 (3.1mm), 6 (1.3mm), 7 (0.87mm), & 9 (0.44mm)
 Max 1 km baseline (~0.1″ resolution)
Cycle 2 (2014-2015)
 34 x 12m antennas
 ACA (9 x 7m, 2 x 12m TP antennas)
 Bands 3, 4 (2.1mm), 6, 7, 8 (0.74mm), & 9
 Max 1-1.5 km baseline (~0.1″ resolution)
 Polarization (Band 3, 6, & 7, no ACA)
5
ALMA
Science Archive
- ASA:(12
Proprietary
Period
Protection of your Proprietary periods
months)
Proposed data (standard and DDT proposals)
Instantly available to PI
- Available to anyone after proprietary period (12 or 6 calendar months).
Verification and calibrator data are instantly available to anyone
Accessible by
anyone
Accessible
to anonymous
Accessible only by PI
ALMA PI & delegated COIs
QA2
12 Mnths after delivery
Director discretionary time
QA2
6 Mnths
Processing period
Science
verification
Calibrator data
QA2
verification
QA2
verification
Accessible by
Accessible
to anyone
anonymous
6
Proprietary Period (12 months)
Most of Cycle 0 data
(>100 projects)
are publicly available now.
7
Publication with ALMA Archive
Archive
Cycle0 (4)
3%
1/3 of ALMA publications
are based on archival data.
There are only a few papers
based on Cycle0 archival
data.
Archive SV
(37)
32%
PI Cycle0/1
(83)
65%
As of 2014-07-09
(ALMA publication statistics)
Refereed ALMA publications (total: 124)
8
ALMA Archival Papers
 Discovery of the simplest sugar, Glycolaldehyde (HCOCH2OH)
from the young “solar-mass” protostellar binary, IRAS 16293-2422
ALMA SV Band 6 Data
16 antennas, 5.4 hours, 2 pointings
Mass ~ 3 M⊙
Sources A (rotation)
Jørgensen et al. 2012, ApJL
Pineda et al. 2012, A&AL
Source B (inflow - inverse P-Cygni profile)
9
ALMA Archival Papers
 The first detection of vibrationally-excited water vapor emission in
star forming regions
 Revealing the disk and its kinematics around Orion KL Source I:
A new tool to explore the vicinity of forming stars
Receding gas
ALMA SV band 6 Data
16 antennas, 20 minutes
Hirota et al. 2012, ApJL
Approaching gas
10
ALMA Archival Papers
 Probing detailed physical and chemical conditions of
protoplanetary disks
TW Hydrae
Bergin et al. 2013, Nature
SMA 2 nights =>
Hughes et al. 2011
CO(3-2)
ALMA SV band 7 Data, 9 antennas, 2.4 hours
(x10 more sensitive than the previous SMA observations)
CO(3-2)
Tgas = 30 K
Mgas> 3.9 × 10−3 M⊙
Spectrum of the central region
HST image (1.7-2.2um)
Debes et al. 2013, ApJ
100AU
160AU / 3”
NASA, ESA, Z. Levay (STScI/AUR
11
ALMA Archival Papers
 Clear [CII] 158μm line detection from the distant galaxy
BR1202-0725 (z=4.7)
ALMA SV Band 7 Data
17 antennas, 30 minutes
SMA 20 hours
Iono et al. 2006
Wagg et al. 2012, ApJL
12
ALMA Archival Papers
 Discovery of a clumpy molecular gas arm in merging galaxies
 Stars will born in the clumps in the tidal molecular arms as
predicted by numerical simulations
The Antennae
Numerical Simulation
Teyssier et al. 2010, A&AL
ALMA
(ESO/NAOJ/NRAO)
HST (NASA/ESA)
ALMA SV Band 6 Data
14 antennas, 17 pointings
CO(2-1)
Espada et al. 2012, ApJL
The star formation efficiency in the tidal arm (~6 Gyr-1) is a
factor of x10 higher than those in normal disk galaxies.
Gas
Old
Stars
Young
Stars
Numerical Simulation
Matsui et al. 2012,ApJ
13
ALMA Archive
http://almascience.nao.ac.jp/aq/
CO(3-2)
14
Quick Look with JVO
http://jvo.nao.ac.jp/portal/alma/archive.do
CO(3-2)
15
Quick Look with JVO
CO(3-2)
CO(3-2) emission from the AGB star R Sculptoris
(Maercker et al. 2012, Nature)
16
Summary
• ALMA archival data of >100 Cycle 0
projects are now publicly available.
• 1/3 of ALMA publications are based on
archival data.
• There are only a few Cycle0 archival
papers publihed yet.
• JVO is useful to visually check the archival
data.