Rejuvenated galaxies with very old bulges at the origin of the bending of the main sequence and of the 'green valley'
| Autor: | Alvio Renzini, Maurilio Pannella, A. Puglisi, Pietro Bergamini, Emanuele Daddi, Ivano Baronchelli, Giulia Rodighiero, Alberto Franceschini, Michele Cappellari, Chiara Mancini, L. Rodríguez-Muñoz, Stéphanie Juneau, Daizhong Liu, Chiara D'Eugenio |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Age of the universe 010308 nuclear & particles physics Star formation astro-ph.GA FOS: Physical sciences Astronomy and Astrophysics Bending Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Astrophysics - Astrophysics of Galaxies Redshift Galaxy Flattening Space and Planetary Science Bulge Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Astrophysics::Earth and Planetary Astrophysics 10. No inequality 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Sequence (medicine) |
| Zdroj: | Monthly Notices of the Royal Astronomical Society |
| Popis: | We investigate the nature of star-forming galaxies with reduced specific star formation rate (sSFR) and high stellar masses, those `green valley' objects that seemingly cause a reported bending, or flattening, of the star-forming main sequence. The fact that such objects host large bulges recently led some to suggest that the internal formation of bulges was a late event that induced the sSFRs of massive galaxies to drop in a slow downfall, and thus the main sequence to bend. We have studied in detail a sample of 10 galaxies at $0.45 Comment: 26 pages, 19 figures, accepted by MNRAS |
| Databáze: | OpenAIRE |
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