SIMBAD references

2019RAA....19...81C - Research in Astron. and astroph., 19, 81-81 (2019/June-0)

The morphology, kinematics and metallicity of blue-core galaxies.

CHEN Y.-Y., CHEN Y.-M., GU Q.-S., SHI Y., BING L.-J. and YU X.-L.

Abstract (from CDS):

We select 107 blue-core galaxies from the MaNGA survey, studying their morphology, kinematics as well as the gas-phase metallicity. Our results are as follows: (i) In our sample, 26% of blue-core galaxies have decoupled gas-star kinematics, indicating external gas accretion; 15% have bar-like structure and 8% show post-merger features, such as tidal tails and irregular gas/star velocity field. All these processes/features, such as accreting external misaligned gas, interaction and bar, can trigger gas inflow. Thus the central star-forming activities lead to bluer colors in their centers (blue-core galaxies). (ii) By comparing with the SDSS DR7 star-forming galaxy sample, we find that the blue-core galaxies have higher central gas-phase metallicity than what is predicted by the local mass-metallicity relation. We explore the origin of the higher metallicity, finding that not only the blue-core galaxies, but also the flat-gradient and red-core galaxies all have higher metallicity. This can be explained by the combined effect of redshift and galaxy color.

Abstract Copyright:

Journal keyword(s): galaxies: abundances - galaxies: formation - galaxies: structure

Status in Simbad:  being processed

Simbad objects: 1

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