Over the past few years, chemical studies have revealed multiple structures in the vicinity of young stellar objects (YSOs). It has become evident that specific physical conditions are associated with the emission of particular molecular lines, allowing us to use molecular probes of the YSO physics. Consequently, chemical surveys are now necessary to fully constrain the origin of the observed structures. Several surveys have been conducted to explore the chemistry of YSOs, focusing on Class 0 and Class II objects. However, our knowledge of intermediate objects, that are Class I objects, remains limited. To bridge the gap and establish the relationship between observed structures and molecular line emission at the Class I evolutionary stage, we investigate the spatial distribution of key molecular gas species in the low-mass Class I protostar L1489 IRS (IRAS 04016+2610), a source part of the ChemYSO survey. We performed a 3mm line survey at high spatial and high spectral resolution using the NOEMA interferometer and the IRAM-30m telescope. For the data analysis, we applied and compared two methods: a streamline model and the new python package TIPSY. We present here the ten brightest lines of our survey, in which we identified a new ~3000au long streamer in HC_3_N, C_2_H, and c-C_3_H_2_ emission, likely associated with more localized accretion shocks probed in SO. In addition, two ~10000 au bubbles are seen with the dense molecular tracers HCO+, CS, and HCN around the YSO. We retrieve previously identified structures, like an outflow in HCO+ and another streamer in C_2_H. Additionally, potential indicators of a second outflow appear in CS and HCN emission, but its nature remains to be confirmed.

Cone search capability for table J/A+A/687/A92/list (List of fits files)