We present the project of a VLBI study of the 22 GHz H2O maser in a prototypical low-mass protostellar system IRAS 16293-2422. The observation was conducted to characterise the cause of the newly discovered enhanced maser activity in the source and to study the source's ejection behaviour as traced by maser emission. Single-dish monitoring and analysis of archival data indicate that the activity of the H2O maser in IRAS 16293-2422 has a cyclic character and traces episodic ejection events in the source. A new maser flare was recently discovered in a spectral feature that has never shown such a significant increase in flux density before. The flare of this feature seems to indicate the beginning of a new cycle of activity.
@article{arxiv.2204.12910,
title = {Episodic ejection from a low-mass young stellar object traced by H$_2$O masers},
author = {Zs. M. Szabó and O. Bayandina and Á. Kóspál and P. Ábrahám and K. É. Gabányi and Zs. Nagy and V. L. Tóth and S. P. van den Heever},
journal= {arXiv preprint arXiv:2204.12910},
year = {2022}
}
Comments
5 pages, 3 figures, accepted in the proceedings of the European VLBI Network Mini-Symposium and Users' Meeting 2021, Proceedings of Science