Investigating the link between inner gravitational potential and star-formation quenching in CALIFA galaxies

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Kalinova, VMax Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (författare)

It has been suggested that gravitational potential can have a significant role in suppressing star formation in nearby galaxies. To establish observational constraints on this scenario, we investigated the connection between the dynamics - taking the circular velocity curves (CVCs) as a proxy for the inner gravitational potential - and star formation quenching in 215 non-active galaxies across the Hubble sequence from the Calar Alto Legacy Integral Field Area (CALIFA) survey. Our results show that galaxies with similar CVCs tend to have a certain star-formation quenching pattern. To explore these findings in more details, we constructed kiloparsec (kpc) resolved relations of the equivalent width of the H alpha (W-H alpha) versus the amplitude (V-c) and shape (beta = dln V-c/d ln R) of the circular velocity at given radii. We find that the W-H alpha V-c is a declining relationship, where the retired regions of the galaxies (the ones with W-H alpha values of below 3 angstrom) tend to have higher V-c. Concurrently, W-H alpha-beta is a bimodal relationship, which is characterised by two peaks: concentration of the star forming regions at a positive beta (rising CVC) and a second concentration of the retired regions with a negative beta (declining CVC). Our results show that both the amplitude of the CVC - driven by the mass of the galaxies - and its shape - which reflects the internal structure of the galaxies - play an important role in the quenching history of a galaxy.

Colombo, D.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (författare)
Sanchez, S. F.Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico (författare)
Rosolowsky, E.University of Alberta (författare)
Kodaira, K.National Astronomical Observatory of Japan,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),The Graduate University for Advanced Studies (SOKENDAI) (författare)
Garcia-Benito, R.Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council (författare)
Meidt, S. E.Universiteit Gent,Ghent university (författare)
Davis, T. A.Cardiff University (författare)
Romeo, Alessandro,1961Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)romeo (författare)
Yu, S-YMax Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (författare)
Delgado, R. GonzalezAgencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council (författare)
Lacerda, E. A. D.Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico (författare)
Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG)Universidad Nacional Autónoma de México (UNAM) (creator_code:org_t)

Av författaren/redakt...: Kalinova, V; Colombo, D.; Sanchez, S. F.; Rosolowsky, E.; Kodaira, K.; Garcia-Benito, R ...; visa fler...; Meidt, S. E.; Davis, T. A.; Romeo, Alessandr ...; Yu, S-Y; Delgado, R. Gonz ...; Lacerda, E. A. D ...; visa färre...

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