Fechar

@Article{Sá-FreitasGCMBSBDM:2022:CoTrFu,
               author = "S{\'a}-Freitas, Camila de and Gon{\c{c}}alves, T. S. and 
                         Carvalho, R. R. de and Men{\'e}ndez-Delmestre, K. and Barchi, 
                         Paulo Henrique and Sampaio, V. M. and Basu-Zych, A. and Darvish, 
                         B. and Martin, C.",
          affiliation = "{Universidade Federal do Rio de Janeiro (UFRJ)} and {Universidade 
                         Federal do Rio de Janeiro (UFRJ)} and {Universidade Cruzeiro do 
                         Sul} and {Universidade Federal do Rio de Janeiro (UFRJ)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Cruzeiro do Sul} and {NASA Goddard Space Flight 
                         Center} and {California Institute of Technology} and {California 
                         Institute of Technology}",
                title = "Quenching, bursting, and galaxy shapes: Colour transformation as a 
                         function of morphology",
              journal = "Monthly Notices of the Royal Astronomical Society",
                 year = "2022",
               volume = "509",
               number = "3",
                pages = "3889--3903",
                month = "Jan.",
             keywords = "cD, galaxies: elliptical and lenticular, galaxies: evolution, 
                         galaxies: spiral, galaxies: star formation.",
             abstract = "Different mechanisms for quenching star formation in galaxies are 
                         commonly invoked in the literature, but the relative impact of 
                         each one at different cosmic epochs is still unknown. In 
                         particular, the relation between these processes and morphological 
                         transformation remains poorly understood. In this work, we measure 
                         the effectiveness of changes in star formation rates by analysing 
                         a new parameter, the Star Formation Acceleration (SFA), as a 
                         function of galaxy morphology. This methodology is capable of 
                         identifying both bursting and quenching episodes that occurred in 
                         the preceding 300 Myr. We use morphological classification 
                         catalogues based on Deep Learning techniques. Our final sample has 
                         \∼14 200 spirals and \∼2500 ellipticals. We find 
                         that elliptical galaxies in the transition region have median 
                         shorter quenching time-scales (\τ < 1 Gyr) than spirals 
                         (\τ \≥ 1 Gyr). This result conforms to the scenario 
                         in which major mergers and other violent processes play a 
                         fundamental role in galaxy evolution for most ellipticals, not 
                         only quenching star formation more rapidly but also playing a role 
                         in morphological transformation. We also find that 
                         \∼two-thirds of galaxies bursting in the green valley in 
                         our sample are massive spirals (\$M_star ge 10^{11.0}, 
                         mathrm{M}_odot\$) with signs of disturbance. This is in 
                         accordance with the scenario where low-mass galaxies are losing 
                         their gas in an interaction with a massive galaxy: while the 
                         former is quenching, the last is being refueled and going through 
                         a burst, showing signs of recent interaction.",
                  doi = "10.1093/mnras/stab3230",
                  url = "http://dx.doi.org/10.1093/mnras/stab3230",
                 issn = "0035-8711 and 1365-2966",
             language = "en",
           targetfile = "freitas2022_quenching.pdf",
        urlaccessdate = "25 jun. 2024"
}


Fechar