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We present the N2H+(J=1-0) map of the Serpens South molecular cloud obtainedas part of the CARMA Large Area Star Formation Survey (CLASSy). Theobservations cover 250 square arcminutes and fully sample structures from 3000AU to 3 pc with a velocity resolution of 0.16 km/s, and they can be used toconstrain the origin and evolution of molecular cloud filaments. The spatialdistribution of the N2H+ emission is characterized by long filaments thatresemble those observed in the dust continuum emission by Herschel. However,the gas filaments are typically narrower such that, in some cases, two or threequasi-parallel N2H+ filaments comprise a single observed dust continuumfilament. The difference between the dust and gas filament widths casts doubton Herschel ability to resolve the Serpens South filaments. Some molecularfilaments show velocity gradients along their major axis, and two arecharacterized by a steep velocity gradient in the direction perpendicular tothe filament axis. The observed velocity gradient along one of these filamentswas previously postulated as evidence for mass infall toward the centralcluster, but these kind of gradients can be interpreted as projection oflarge-scale turbulence.

CARMA Large Area Star Formation Survey: Observational Analysis of Filaments in the Serpens South Molecular Cloud