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Galaxies 2015, 3(4), 156-163;

Isolated Galaxies versus Interacting Pairs with MaNGA

Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editors: Alexei Moiseev, José Alfonso López Aguerri and Enrichetta Iodice
Received: 1 October 2015 / Revised: 26 October 2015 / Accepted: 26 October 2015 / Published: 30 October 2015
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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

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Fernández, M.D.C.A.; Yuan, F.; Shen, S.; Yin, J.; Chang, R.; Feng, S. Isolated Galaxies versus Interacting Pairs with MaNGA. Galaxies 2015, 3, 156-163.

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