Kalinova, V., Colombo, D., Sánchez, S. F., Rosolowsky, E., Kodaira, K., García-Benito, R., Meidt, S. E., Davis, Timothy  ORCID: https://orcid.org/0000-0003-4932-9379, Romeo, A. B., Yu, S.-Y., González Delgado, R. and Lacerda, E. A. D.
2022.
Investigating the link between inner gravitational potential and star-formation quenching in CALIFA galaxies.
Astronomy & Astrophysics
665
, A90.
10.1051/0004-6361/202243541
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Abstract
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 Hα (WHα) versus the amplitude (Vc) and shape (β = dlnVc/dlnR) of the circular velocity at given radii. We find that the WHα − Vc is a declining relationship, where the retired regions of the galaxies (the ones with WHα values of below 3 Å) tend to have higher Vc. Concurrently, WHα − β is a bimodal relationship, which is characterised by two peaks: concentration of the star forming regions at a positive β (rising CVC) and a second concentration of the retired regions with a negative β (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.
| Item Type: | Article |
|---|---|
| Date Type: | Published Online |
| Status: | Published |
| Schools: | Physics and Astronomy |
| Publisher: | EDP Sciences |
| ISSN: | 0004-6361 |
| Date of First Compliant Deposit: | 14 February 2023 |
| Date of Acceptance: | 7 July 2022 |
| Last Modified: | 25 May 2023 18:56 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/156987 |
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