Science with NANTEN2

The science projects with NANTEN2 will focus on the study of the large scale distribution, structure, dynamics, and chemistry of the ISM in the Milky Way and nearby external galaxies. The most important diagnostics to determine physical parameters such as temperature, column density, and density in the mm and submm windows are:

Low-J CO, atomic carbon lines: large scale distribution of gas

Mid-J CO lines, 13CO 8-7 (880 GHz) warm gas in dense cores.

The main science goal for SMART at NANTEN2 is simultaneous large scale mapping in both atomic carbon lines (492 and 810 GHz) and CO 4-3/7-6 (460 and 806 GHz) of the southern Milky Way and selected nearby galaxies.

Observations of these lines in the largely unexplored southern sky will be analyzed and interpreted using tools to characterize cloud structure (e.g. -variance), radiative transfer models, and models of Photon Dominated Regions (PDRs). In addition, they serve as complementary and preperatory work for studies with HIFI/Herschel, SOFIA, APEX, and ALMA. NANTEN2 will reach angular resolutions of ~24'' at 810 GHz, slightly better than HIFI onboard the Herschel satellite and comparable with the IRAM 30 m telescope at 115 GHz.

The science topics and a selection of prime targets determined by the joint working groups in the NANTEN2 consortium are:


Low mass star formation: Chamaeleon, Lupus, Serpens, B68, Ophiuchus, ...

High mass star formation: Carina, NGC 3603, NGC 6334/6357, RCW 106, ...

Supernova remnants, Galactic Center

Nearby galaxies

Magellanic clouds, M83, NGC 253, Cen A, Antennae, ...


List of publications containing data obtained at the NANTEN2 telescope