Properties of green valley galaxies in relation to their selection criteria. Issue Volume 15:Issue S356(2019) (October 2019)

• Record Type: Journal Article
• Authors: Nyiransengiyumva, Beatrice; Pović, Mirjana; Nkundabakura, Pheneas; Mahoro, Antoine
• Editors: Pović, Mirjana; Marziani, Paola; Masegosa, Josefa; Netzer, Hagai; Negu, Seblu H.; Tessema, Solomon B.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S356(2019)
• Page Start: 152
• Page End: 157
• Publication Date: 2019-10
• Subjects: galaxies: active, -- galaxies: star formation, -- galaxies: fundamental parameters, -- galaxies: evolution, -- ultraviolet: galaxies, -- methods: statistical; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921320002781
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: The distribution of galaxies has been studied to show the difference between the blue cloud and red sequence and to define the green valley region. However, there are still many open questions regarding the importance of the green valley for understanding the morphological transformation and evolution of galaxies, how galaxies change from late-type to early-type and the role of AGN in galaxy formation and evolution scenario. The work focused on studying in more details the properties of green valley galaxies by testing the six most used selection criteria, differences between them, and how they may affect the main results and conclusions. The main findings are that, by selecting the green valley galaxies using different criteria, we are selecting different types of galaxies in terms of their stellar masses, sSFR, SFR, spectroscopic classification and morphological properties, where the difference was more significant for colour criteria than for sSFR and SFR vs. M* criteria.