possible co follow-up of manga cheng li (shao), martin bureau (oxford)
TRANSCRIPT
Mapping Nearby Galaxies at Apache Point Observatory
(one of the three major experiments in SDSS-IV ) SDSS-IV 2014-2020 10,000 galaxies Mass-limited sample:
lg(M*/Mo)>9 0.0<z<0.15, <z>=0.03 Sloan 2.5m telescope, 3
deg field Spatial resolution = 2" (1-2
kpc) Spectral resolution = 60
km/s Spectral coverage: 3600-
10000AA Poisson-limited sky
subtraction S/N=4-8 at 1.5 Re Exposure ~3 hours: 3
dithers x 15 min, repeat 3 times over 3 nights
9/23/2014Future Science with the JCMT2
lg(h
alo
mass
)
lg(stellar mass)
MaNGA Key Science Questions Disk growth: How galactic disks grow through
gas accretion? Bulge growth: What are roles of stellar accretion,
major mergers, and disk instabilities in driving the growth of bulges?
Star formation quenching: How is the star formation cessation regulated by internal and external processes?
Kinematics: How was angular momentum distributed among baryonic and non-baryonic subcomponents as galaxies formed?
Dark Matter Halo: How do baryons and stars trace and influence the shape of the dark halos in which they reside?
9/23/2014Future Science with the JCMT3
Future Science with the JCMT
Ongoing efforts to obtain CO data
9/23/20148
Aim: CO emission line for a large sample of MaNGA galaxies with flat mass distribution and uniform limit MH2/M*=0.03
MaNGA ancillary program (PI: Jose Sanchez-Gallego) Prioritizing >150 MaNGA targets with COLD-GASS
data (Santonge et al. 2011) Two proposals submitted to NRO-45m (PI: Rieko
Momose) CO(J=1-0) for 100 MaNGA targets with
lg(M*/Mo)>11.0 and 0.02<z<0.05
CO follow-up with JCMT for MaNGA targets?
Future Science with the JCMT
CO – Optical IFU Science
9/23/201410
SF: Probe SF efficiency as a function of 2D
parameters… K-S law (morphological type, …)
Tully-Fisher relation Kinematics of different tracers
Metallicity gradients Accretion mechanisms and environment XCO conversion factor CO in early-type galaxies
Future Science with the JCMT
CO follow-up of MaNGA with JCMT
9/23/201411
Sample: a number of additional 250 galaxies (thus 500 in total
if the MaNGA ancillary proposal and NRO-45m proposals are approved)
9.5<lg(M*/Mo)<11.5, 0.01<z<0.025 flat mass distribution following COLD-GASS
Observation global molecular gas using CO(J=2-1) spectral line down to a uniform detection limit: MH2/M*=0.03
Observing strategy Pointing observations: 1-2 pointings per galaxy Beam 22” vs. IFU radius <32” Bad weather: Band 4
Future Science with the JCMT
Non-source rms noise and exposure time
9/23/201412
(Calculation done by Georgios Magdis)
Future Science with the JCMT
T=250 hrs for >250 galaxies9.5<lg(M*/Mo)<11.5, 0.01<z<0.025
9/23/201413
lg(M*/Mo)
z9.0-9.5 9.5-10.5
10.5-11.5
11.5-12.0
Total time
0.010-0.015
199(2252 hr)
72/72(18.6 hr)
2/2(0.06 hr)
0 18.7 hr
0.015-0.025
2625(NAN)
53/3852( 218 hr)
123/193(13.5 hr)
0 232 hr
0.025-0.035
260(NAN)
3882(94268
hr)
2533(1030
hr)
1(0.04 hr)
0.035-0.045
312(NAN)
3413(253074
hr)
1583(2137
hr)
1(0.08 hr)
0.045-0.055
0 1452(NAN)
1666(6192
hr)
1(10.2 hr)
Total time 237 hr 13.6 hr 250 hr
Future Science with the JCMT
People (MaNGA)
9/23/201414
China: Cheng Li, Yu Gao, Yong Shi, Junzhi Wang, Hong Wu, Ming Zhu
Taiwai: Li-hwai Lin, Yen-Ting Lin
Japan: Kevin Bundy, Rieko Momose, Wiphu Rujopakarn, Kenichi Tadaki,
Kotaro Kohno Korea ? UK:
Martin Bureau, Karen Masters, Georgios Magdis Canada ? Others:
Jose Sanchez-Gallego, Renbin Yan, Eva Schinnerer
And you…