Isolated Galaxies versus Interacting Pairs with MaNGAReport as inadecuate




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Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China



These authors contributed equally to this work.





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Academic Editors: Alexei Moiseev, José Alfonso López Aguerri and Enrichetta Iodice

Abstract We present preliminary results of the spectral analysis on the radial distributions of the star formation history in both a galaxy merger and a spiral isolated galaxy observed with MaNGA. We find that the central part of the isolated galaxy is composed by older stellar population ~2 Gyr than in the outskirts ~7 Gyr. Also, the time-scale is gradually larger from 1 Gyr in the inner part to 3 Gyr in the outer regions of the galaxy. In the case of the merger, the stellar population in the central region is older than in the tails, presenting a longer time-scale in comparison to central part in the isolated galaxy. Our results are in agreement with a scenario where spiral galaxies are built from inside-out. In the case of the merger, we find evidence that interactions enhance star formation in the central part of the galaxy. View Full-Text

Keywords: interacting galaxies; isolated galaxies; peculiar galaxies interacting galaxies; isolated galaxies; peculiar galaxies





Author: María del Carmen Argudo Fernández * , Fangting Yuan †, Shiyin Shen †, Jun Yin †, Ruixiang Chang † and Shuai Feng †

Source: http://mdpi.com/



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