COLD METHANOL FORMATION LADDER AND VISUAL EXTINCTION: TEST THE CHEMICAL MODEL

Abstract

In this work, we present the maps of the (2–1) and (3–2) methanol transitions towards seven dense cores in the L1495 star-forming region in Taurus. We search for correlation between methanol abundance and visual extinction measured using the Herschel /SPIRE dust con-tinuum observations. For one of the cores, we also present the maps of the methanol precursors, HCO and H 2 CO. Towards four dense cores, methanol forms ring-like structures while towards three cores methanol emission peak coincides with dust emission peak. These three cores are probably young, they have not formed their CO freeze-out zones yet.