VizieR Online Data Catalog: Role of bars in enhancing central star formation (Lin+, 2020)

As one of the three key programs of the fourth-generation of SDSS (SDSS-IV; Blanton et al. 2017AJ....154...28B), MaNGA is an integral-field unit (IFU) spectroscopic survey (Bundy et al. 2015ApJ...798....7B), aiming to achieve kpc-scale spatially resolved IFU datacubes for about 10000 nearby galaxies.

In this work, we use the internal data release of MaNGA, the MaNGA Product Launch 7 (MPL-7), that includes DRP and DAP products for 4672 galaxies and is identical to the MaNGA data released with the SDSS Data Release 15 (DR15; Aguado et al. 2019ApJS..240...23A).

For our study, we select a sample of galaxies from the MPL-7 as follows. First, we select nearly face-on galaxies, with minor-to-major axial ratio b/a>0.5. Secondly, we restrict ourselves to relatively low redshifts z<0.05. Third, we select late-type galaxies by requiring T-type>0. The morphological classification was taken from Dominguez Sanchez et al. (2018MNRAS.476.3661D, Cat. J/MNRAS/476/3661). Finally, we make use of the MPL-7 version of the close pair galaxy catalogue to exclude 78 galaxies that are merging systems at the final coalescence stage. These restrictions give rise to a sample of 1452 late-type galaxies.

We visually examined the SDSS gri images of all 1425 galaxies in our sample and constructed our barred galaxy sample consisting of 252 galaxies. See Table 2 for details.

We also searched for turnover galaxies in our sample and found 121 galaxies having a central upturn in EW(Hα), EW(Hδ_A), and/or a central drop in D_n(4000). See Table 3 for details.

(2 data files).