Star Formation in the Local Universe from the CALIFA Sample. II. Activation and Quenching Mechanisms in Bulges, Bars, and Disks

• Autores: Catalán-Torrecilla, C.; Gil De Paz, A.; Castillo-Morales, A.; Méndez-Abreu, J.; Falcón-Barroso, J.; Bekeraite, S.; Costantin, L.; Lorenzo-Cáceres, A. De; Florido, E.; García-Benito, R.; Husemann, B.; Iglesias-Páramo, J.; Kennicutt, R.C.; Mast, Damian; Pascual, S.; Ruiz-Lara, T.; Sánchez-Menguiano, L.; Sánchez, S.F.; Walcher, C.J.; Bland-Hawthorn, J.; Puertas, S. Duarte; Marino, R. A.; Masegosa, J.; Sánchez-Blázquez, P.; Califa Collaboration
• Año de publicación: 2017
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: GALAXIES: EVOLUTION; GALAXIES: SPIRAL; GALAXIES: STAR FORMATION; GALAXIES: STRUCTURE; TECHNIQUES: PHOTOMETRIC; TECHNIQUES: SPECTROSCOPIC
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

We estimate the current extinction-corrected Hα star formation rate (SFR) of the different morphological components that shape galaxies (bulges, bars, and disks). We use a multicomponent photometric decomposition based on Sloan Digital Sky Survey imaging to Calar Alto Legacy Integral Field Area Integral Field Spectroscopy (IFS) datacubes for a sample of 219 galaxies. This analysis reveals an enhancement of the central SFR and specific SFR (sSFR = SFR/M ∗) in barred galaxies. Along the main sequence, we find that more massive galaxies in total have undergone efficient suppression (quenching) of their star formation, in agreement with many studies. We discover that more massive disks have had their star formation quenched as well. We evaluate which mechanisms might be responsible for this quenching process. The presence of type 2 AGNs plays a role at damping the sSFR in bulges and less efficiently in disks. Also, the decrease in the sSFR of the disk component becomes more noticeable for stellar masses around 1010.5for bulges, it is already present at ∼ 109.5. The analysis of the line-of-sight stellar velocity dispersions (σ) for the bulge component and of the corresponding Faber-Jackson relation shows that AGNs tend to have slightly higher σ values than star-forming galaxies for the same mass. Finally, the impact of environment is evaluated by means of the projected galaxy density, Σ5. We find that the SFR of both bulges and disks decreases in intermediate- to high-density environments. This work reflects the potential of combining IFS data with 2D multicomponent decompositions to shed light on the processes that regulate the SFR.
Fil: Catalán-Torrecilla, C.. Universidad Complutense de Madrid; España
Fil: Gil De Paz, A.. Universidad Complutense de Madrid; España
Fil: Castillo-Morales, A.. Universidad Complutense de Madrid; España
Fil: Méndez-Abreu, J.. University of St. Andrews; Reino Unido
Fil: Falcón-Barroso, J.. Universidad de La Laguna; España. Instituto Astrofisico de Canarias; España
Fil: Bekeraite, S.. Astrophysikalisches Institut Potsdam; Alemania
Fil: Costantin, L.. Università di Padova; Italia
Fil: Lorenzo-Cáceres, A. De. University of St. Andrews; Reino Unido
Fil: Florido, E.. Universidad de Granada; España
Fil: García-Benito, R.. Instituto de Astrofísica de Andalucía; España
Fil: Husemann, B.. European Southern Observatory; Alemania
Fil: Iglesias-Páramo, J.. Instituto de Astrofísica de Andalucía; España
Fil: Kennicutt, R.C.. Instituto de Astrofísica de Andalucía; España. University Of Cambridge Institute Of Astronomy; Reino Unido
Fil: Mast, Damian. Centro Brasileiro de Pesquisas Físicas; Brasil. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Pascual, S.. Universidad Complutense de Madrid; España
Fil: Ruiz-Lara, T.. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; España. Universidad de Granada; España
Fil: Sánchez-Menguiano, L.. Universidad de Granada; España. Instituto de Astrofísica de Andalucía; España
Fil: Sánchez, S.F.. Universidad Nacional Autónoma de México; México
Fil: Walcher, C.J.. Astrophysikalisches Institut Potsdam; Alemania
Fil: Bland-Hawthorn, J.. The University Of Sydney; Australia. Instituto de Astrofísica de Andalucía; España
Fil: Puertas, S. Duarte. Instituto de Astrofísica de Andalucía; España
Fil: Marino, R. A.. Escuela Politécnica Federal de Zúrich. Instituto de Astronomía. Departamento de Física; Suiza
Fil: Masegosa, J.. Instituto de Astrofísica de Andalucía; España
Fil: Sánchez-Blázquez, P.. Universidad de Chile; Chile. Universidad Autónoma de Madrid; España
Fil: Califa Collaboration. No especifica;