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The properties of inside-out assembled galaxies at z < 0.1

Published online by Cambridge University Press:  29 January 2021

Dejene Zewdie ,
Mirjana Pović ,
Manuel Aravena ,
Roberto J. Assef  and
Asrate Gaulle
Dejene Zewdie
Affiliation:
Núcleo de Astronomía, Universidad Diego Portales, Santiago, Chile email: [email protected] Department of Physics, Debre Berhan University (DBU), Debre Berhan, Ethiopia Ethiopian Space Science and Technology Institute-AAU, Addis Ababa, Ethiopia
Mirjana Pović
Affiliation:
Ethiopian Space Science and Technology Institute-AAU, Addis Ababa, Ethiopia Instituto de Astrofisica de Andalucía (IAA-CSIC), Granada, Spain
Manuel Aravena
Affiliation:
Núcleo de Astronomía, Universidad Diego Portales, Santiago, Chile email: [email protected]
Roberto J. Assef
Affiliation:
Núcleo de Astronomía, Universidad Diego Portales, Santiago, Chile email: [email protected]
Asrate Gaulle
Affiliation:
Department of Physics, Dilla University, Dilla, Ethiopia
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Abstract

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In this work, we study the properties of galaxies that are showing the inside-out assembly (which we call inside-out assembled galaxies; IOAGs), with the main aim to understand better their properties and morphological transformation. We analysed a sample of galaxies from the Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8), with stellar masses in the range log M* = 10.73 – 11.03 M⊙ at at z < 0.1, and analyze their location in the stellar mass-SFR and the color-stellar mass diagram. We found that IOAGs have different spectroscopic properties, most of them being classified either as AGN or composite. We found that the majority of our sources are located below the main sequence of star formation in the SFR-stellar mass diagram, and in the green valley or red sequence in the color-stellar mass diagram. We argue that IOAGs seem to correspond to the transition area where the galaxies are moving from star-forming to quiescent, and from the blue cloud to the red sequence and/or to recently quenched galaxies.

Keywords

Galaxies: propertiesgalaxies: inside-out
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 358 - 360
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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