Filamentary accretion flows in high-mass star-forming clouds

Abstract

We quantify the gas flows from a scale of up to several parsecs down to the sub-parsec scale along filamentary structures in the three high-mass star-forming regions G75.78, IRAS21078+5211 and NGC7538 with data obtained from the IRAM 30 m telescope. The analysis is carried out using the surface density derived from 1.2 mm continuum emission and velocity differences estimated from HCO${}^{+}$ and H${}^{13}$CO${}^{+}$ molecular line data.

Accepted for publication in A&A, 20 pages