Reflections on nebulae around young stars: A systematic search for late-stage infall of material onto Class II disks
arXiv:2301.02994 · doi:10.1051/0004-6361/202245254
Abstract
Context. While it is generally assumed that Class II sources evolve largely in isolation from their environment, many still lie close to molecular clouds and may continue to interact with them. This may result in late accretion of material onto the disk that can significantly influence disk processes and planet formation. Aims. In order to systematically study late infall of gas onto disks, we identify candidate Class II sources in close vicinity to a reflection nebula (RN) that may be undergoing this process. Methods. First we targeted Class II sources with known kilo-au scale gas structures - possibly due to late infall of material - and we searched for RNe in their vicinity in optical and near-infrared images. Second, we compiled a catalogue of Class II sources associated with RNe and looked for the large-scale CO structures in archival ALMA data. Using the catalogues of protostars and RNe, we also estimated the probability of Class II sources interacting with surrounding material. Results. All of the sources with large-scale gas structures also exhibit some reflection nebulosity in their vicinity. Similarly, at least five Class II objects associated with a prominent RNe, and for which adequate ALMA observations are available, were found to have spirals or stream-like structures which may be due to late infall. We report the first detection of these structures around S CrA. Conclusions. Our results suggest that a non-negligible fraction of Class II disks in nearby star-forming regions may be associated with RNe and could therefore be undergoing late accretion of gas. Surveys of RNe and kilo-au scale gas structures around Class II sources will allow us to better understand the frequency and impact of late-infall phenomena.
Accepted for publication in Astronomy & Astrophysics
References in corpus (23)
- The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
- Theory of Star Formation
- A Compendium of Distances to Molecular Clouds in the Star Formation Handbook
- A protostellar system fed by a streamer of 10,500 au length
- The Disk Substructures at High Angular Resolution Project (DSHARP): IV. Characterizing substructures and interactions in disks around multiple star systems
- Infall-Driven Protostellar Accretion and the Solution to the Luminosity Problem
- Spiral arms in the disk of HD 142527 from CO emission lines with ALMA
- Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Late infall causing disk misalignment and dynamic structures in SU Aur
- Episodic accretion: the interplay of infall and disc instabilities
- PRODIGE -- Envelope to disk with NOEMA I. A 3000 au streamer feeding a Class I protostar
- Anisotropic Infall and Substructure formation in Embedded Disks
- Cloudlet capture by Transitional Disk and FU Orionis stars
- A case of simultaneous star and planet formation
- `Tail-end' Bondi-Hoyle accretion in young star clusters: Implications for disks, planets, and stars
- Are protoplanetary disks born with vortices? -- Rossby wave instability driven by protostellar infall
- Infrared Nebulae Around Young Stellar Objects
- Scattered light mapping of protoplanetary disks
- A Tail Structure Associated with Protoplanetary Disk around SU Aurigae
- Large-scale CO spiral arms and complex kinematics associated with the T Tauri star RU Lup
- A likely flyby of binary protostar Z CMa caught in action
- HD142527: Quantitative disk polarimetry with SPHERE
- Spiral-driven accretion in protoplanetary discs - III tri-dimensional simulations
- Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): A Panchromatic View of DO Tau's Complex Kilo-au Environment