Outflow and accretion detections in the young stellar object IRAS 04579+4703

TL;DR

This study uses submillimeter observations to detect outflows and potential accretion disk structures around a young stellar object, revealing key dynamics of early star formation.

Contribution

First detection of outflow and accretion disk signatures in IRAS 04579+4703 using high-resolution submillimeter data.

Findings

Outflow lobes extend approximately 0.14 and 0.13 pc.

Outflow mass is about 1.8 solar masses.

Estimated outflow dynamical timescale is 17,000 years.

Abstract

We present Submillimeter Array observations of the young stellar object IRAS 04579+4703 in the 1.3 mm continuum and in the 12CO(2-1), 13CO(2-1) and C18O(2-1) lines. The 1.3 mm continuum image reveals a flattened structure with a mass of 13 Msun. The 12CO(2-1) line map and position-velocity (PV) diagram, together with the broad wing (full width=30 km/s of 12CO(2-1)) line, clearly show that there is an outflow motion, which originates from an embedded massive YSO in this region. The lengths of the blue-shifted and red-shifted lobes are 0.14 pc and 0.13 pc respectively. The total gas mass, average dynamical timescale and mass entrainment rate of the outflow are 1.8 Msun, 1.7*10^4 yr and 1.1*10^(-4) Msun/yr, respectively. The flattened morphology of the continuum source perpendicular to the outflow direction, and the velocity gradient seen in the spectra of C18O(2-1) taken from different locations along the major axis of the continuum source, suggest the presence of an accretion disk in this region.