Abstract We present results of spectroscopy with the Southern African Large Telescope (SALT) of 35 objects from the Nearby Void Galaxy (NVG) sample, residing in the Local Volume (LV). The observed galaxies represent mainly the intermediate range of luminosities, with MB, tot between –14.7 and –17.3 mag. For 28 galaxies, confirmed as residing in the nearby voids, we obtain spectra of the diverse quality. For all of them, we detect Hydrogen and strong Oxygen lines that allow us to derive parameter O/H in the observed Hii regions. For 16 galaxies, we detect the faint line Oiiiλ4363, that allows us to directly derive the electron temperature Te and obtain their gas O/H by the direct method. For two objects without Oiiiλ4363 line, their value of 12+log(O/H) falls below ~7.4 dex. To estimate their O/H, we use the empirical ’Strong line’ method of Izotov et al. For 10 objects without Oiiiλ4363 line, with the higher O/H, the modified version of the ’semi-empirical’ method of Izotov and Thuan is used. It takes into account the effect of the excitation parameter O32 on the empirically estimated Te. Of the 35 objects from the parent NVG sample, seven have mistaken radial velocities, and do not reside in the nearby voids. We summarise the current status of the Local Volume void galaxies spectral study. We also discuss the two LV strong metallicity-outliers, DDO215 and ESO252-001, resembling the unusual distant void galaxy VGS 12 with the compelling evidence of cold accretion.
Pustilnik et al. (Tue,) studied this question.