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It has been proposed that the filament environment is closely connected tothe pre-processing of galaxies, where their properties may have been changed byenvironmental effects in the filament before they fell into the galaxy cluster.We present the chemical properties of star-forming dwarf galaxies (SFDGs) infive filamentary structures (Virgo III, Leo Minor, Leo II A, Leo II B, andCanes Venatici) around the Virgo cluster using the Sloan Digital Sky Surveyoptical spectroscopic data and Galaxy Evolution Explorer ultravioletphotometric data. We investigate the relationship between stellar mass,gas-phase metallicity, and specific star formation rate (sSFR) of SFDGs in theVirgo filaments in comparison to those in the Virgo cluster and field. We findthat, at a given stellar mass, SFDGs in the Virgo filaments show lowermetallicity and higher sSFR than those in the Virgo cluster on average. Weobserve that SFDGs in the Virgo III filament show enhanced metallicities andsuppressed star formation activities comparable to those in the Virgo cluster,whereas SFDGs in the other four filaments exhibit similar properties to thefield counterparts. Moreover, about half of the galaxies in the Virgo IIIfilament are found to be morphologically transitional dwarf galaxies that aresupposed to be on the way to transforming into quiescent dwarf early-typegalaxies. Based on the analysis of the galaxy perturbation parameter, wepropose that the local environment represented by the galaxy interactions mightbe responsible for the contrasting features in "chemical pre-processing" foundin the Virgo filaments.

Star-forming Dwarf Galaxies in Filamentary Structures around the Virgo Cluster: Probing Chemical Pre-processing in Filament Environments