1,077 research outputs found
SDSS-IV MANGA: Spatially Resolved Star Formation Main Sequence and LI(N)ER Sequence
We present our study on the spatially resolved H_alpha and M_star relation
for 536 star-forming and 424 quiescent galaxies taken from the MaNGA survey. We
show that the star formation rate surface density (Sigma_SFR), derived based on
the H_alpha emissions, is strongly correlated with the M_star surface density
(Sigma_star) on kpc scales for star- forming galaxies and can be directly
connected to the global star-forming sequence. This suggests that the global
main sequence may be a consequence of a more fundamental relation on small
scales. On the other hand, our result suggests that about 20% of quiescent
galaxies in our sample still have star formation activities in the outer region
with lower SSFR than typical star-forming galaxies. Meanwhile, we also find a
tight correlation between Sigma_H_alpha and Sigma_star for LI(N)ER regions,
named the resolved "LI(N)ER" sequence, in quiescent galaxies, which is
consistent with the scenario that LI(N)ER emissions are primarily powered by
the hot, evolved stars as suggested in the literature.Comment: 6 pages, 4 figures. ApJ Letter accepte
Progress towards a quiescent, high confinement regime for the all-metal ASDEX Upgrade tokamak
EUROfusion Consortium 633053European Union’s Horizon 2020 80516
Characterization of edge poloidal impurity asymmetries at ASDEX Upgrade
EUROfusion Consortium 63305
Experimental study of the impact of ion orbit losses on the edge radial electric field at the ASDEX Upgrade tokamak
Spanish Ministry of Science, Innovation and Universities (grant FPU17/06273)EUROfusion Consortium 63305
Poloidal impurity asymmetry studies using the upgraded high field side edge CXRS diagnostic at ASDEX Upgrade
EUROfusion Consortium 63305
Experimental study of the impact of ion orbit losses on the edge radial electric field at the ASDEX Upgrade tokamak
Determination of the background neutral density from passive Balmer alpha CX emission at the ASDEX Upgrade tokamak
Determination of the background neutral density from passive Balmer alpha CX emission at the ASDEX Upgrade tokamak
EUROfusion Consortium 63305
In-out charge exchange measurements and 3D modelling of diagnostic thermal neutrals to study edge poloidal impurity asymmetries
A new method was developed to model the neutral population produced by the gas puff based charge exchange recombination spectroscopy systems at ASDEX Upgrade (AUG). With this method, the edge impurity density on the high field side (HFS) and low field side (LFS) can be obtained without the need to apply a neutral beam injection system. The neutral penetration needed for the calculation of the impurity density is obtained with a new gas puff module implemented in the FIDASIM code. The LFS impurity density profile evaluated with the new gas puff module matches the impurity density calculated with standard beam-based charge exchange diagnostics. Impurity temperature, rotation and density profiles at the HFS and LFS of an AUG H-mode discharge are presented. Edge impurity toroidal and poloidal flows show asymmetric structures. The impurity density asymmetries obtained with the new gas puff module are consistent with the observed flow structure
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