J-PLUS : the impact of bars on quenching time-scales in nearby green valley disc galaxies

Nogueira-Cavalcante, J. P. and Dupke, R. and Coelho, P. and Dantas, M. L. L. and Gonçalves, T. S. and Menéndez-Delmestre, K. and Oliveira, R. Lopes de and Jiménez-Teja, Y. and López-Sanjuan, C. and Alcaniz, J. and Angulo, R. E. and Cenarro, A. J. and Cristóbal-Hornillos, D. and Hernández-Monteagudo, C. and Ederoclite, A. and Marín-Franch, A. and Oliveira, C. Mendes de and Moles, M. and Jr, L. Sodré and Varela, J. and Ramió, H. Vázquez and Alvarez-Candal, A. and Chies-Santos, A. and Díaz-Garcia, R. and Galbany, L. and Hernandez-Jimenez, J. and Sánchez-Blázquez, P. and Sánchez-Portal, M. and Sobral, D. and Telles, E. and Tempel, E. (2019) J-PLUS : the impact of bars on quenching time-scales in nearby green valley disc galaxies. Astronomy and Astrophysics, 630: A88. ISSN 1432-0746

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Abstract

In a framework where galaxies mostly migrate on the colour-magnitude diagram from star-forming to quiescent, the green valley is considered a transitional galaxy stage. The details of the processes that drive galaxies from star-forming to passive systems still remain unknown. We developed a method that estimates empirically the star formation quenching times-scales of green valley galaxies, assuming an exponential decay model of the SFH and through a combination of narrow and broad bands from J-PLUS and GALEX. We correlate these quenching time-scales with the presence of bars. We find that the J-PLUS colours F0395-g and F0415-g are sensitive to different SFH, showing, a clear correlation with the Dn(4000) and H-delta,A spectral indices. We find that quenching time-scales obtained with our new approach are in agreement with those determined using spectral indices. We also find that galaxies with high bar probability tend to quench their star formation slowly. We conclude that: 1) J-PLUS filters can be used to measure quenching timescales in nearby green valley galaxies; and 2) the resulting star formation quenching time-scales are longer for barred green valley galaxies. Considering that the presence of a bar indicates that more violent processes (e.g., major mergers) are absent in host galaxies, we conclude that the presence of a bar can be used as a morphological signature for slow star formation quenching.