Discovery of an Accretion Streamer and a Slow Wide-angle Outflow around FU Orionis

• DOI: 10.3847/1538-4357/ad31a1
• Publication Date: 2024-04-29T09:19:41Z
• Authors: A. S. Hales; A. Gupta; D. Ruíz-Rodríguez; J. P. Williams; S. Pérez; L. Cieza; C. González-Ruilova; J. E. Pineda; A. Santamaría-Mir...; J. Tobin; P. Weber; Z. Zhu; A. Zurlo
• Keywords: Outflow

Abstract We present Atacama Large Millimeter/submillimeter Array 12-m, 7-m, and Total Power observations of the FU Orionis outbursting system, covering spatial scales ranging from 160 to 25,000 au. The high-resolution interferometric data reveal an elongated 12 CO(2–1) feature previously observed at lower resolution in CO(3–2). Kinematic modeling indicates that this can be interpreted as accretion streamer feeding binary system. mass infall rate provided by is significantly than typical stellar rates (even quiescent states), suggesting alone not massive enough sustain enhanced characteristic class prototype. may directly linked current outburst, but rather a remnant previous, more have contributed disk render it unstable trigger outburst. new detect, for first time, vast, slow-moving carbon monoxide molecular outflow emerging object. To accurately assess properties (mass, momentum, kinetic energy), we employ 13 correct optical depth effects. analysis corresponds swept-up material associated with similar slow outflows around other FUor Class I protostellar objects.