Episodic ejection from a low-mass young stellar object traced by H₂O masers

2022/04/26 by Szabó, Zs. M., Bayandina, O., Kóspál, Á. +5
#Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR)

paper · doi:10.48550/arxiv.2204.12910

Abstract

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.

Related

• Properties of H₂O masers and their associated sources in Sagittarius B2
• Observations of extragalactic masers in bright IRAS sources
• Radioastron probing the fine structure of the flaring H2O maser in star-forming region G25.65+1.05
• Radio Continuum and Water Maser Observations of the High-Mass Protostar IRAS 19035+0641 A
• Considerations on the Origin of IRAS 19312+1950 Based on Long-Term Maser Observations