Issue |
A&A
Volume 651, July 2021
|
|
---|---|---|
Article Number | A107 | |
Number of page(s) | 5 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361/202140697 | |
Published online | 28 July 2021 |
Bar quenching: Evidence from star-formation-rate indicators
1
Faculty of Physics, Ludwig-Maximilians-Universität, Scheinerstr. 1, Munich 81679, Germany
e-mail: koshyastro@gmail.com
2
Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India
Received:
1
March
2021
Accepted:
29
April
2021
The central regions of star-forming barred spiral galaxies can be devoid of star formation because of the redistribution of gas along the length of the bar. However, there can be gas outside the length of the bar that can host star formation. We study a sample of barred disc galaxies in the local Universe with an aim to discriminate between centrally quenched and globally quenched galaxies based on their positions on star-formation-rate–stellar mass (SFR−M⋆) plots and to find a connection between the SFR of quenched galaxies and the length of their bar. We classified barred galaxies as centrally quenched and globally quenched based on their position on SFR−M⋆ plots, with SFRs derived from Hα flux and spectral energy distribution fits on combined ultraviolet and optical flux. We selected galaxies as passive based on the distance from the main sequence relation. From a total 2514 barred galaxies studied here, we present 651 with suppressed star formation in their central region but hosting star formation outside. We also find a possible correlation between bar length and SFR for the galaxies that are fully quenched because of the stellar bar.
Key words: galaxies: evolution / galaxies: star formation / galaxies: formation / galaxies: nuclei
© ESO 2021
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.