2025MNRAS.538L..89S

Query : 2025MNRAS.538L..89S

2025MNRAS.538L..89S - Mon. Not. R. Astron. Soc., 538, L89-L93 (2025/March-3)

Mining the time axis with TRON - II. MeerKAT detects a stellar radio flare from a distant RS CVn candidate.

SMIRNOV O.M., GOLDEN A., MYBURGH T., NGCEBETSHA B., TASSE C., HEYWOOD I., RAMAILA A.J.T., THOMPSON M.A., KENYON J.S., PERKINS S.J., DAWSON J., BESTER H.L., BRIGHT J.S., OOZEER N., SAMBOCO V.G.G., SIHLANGU I. and CHOZA C.

Abstract (from CDS):

Medium-time-scale (minutes to hours) radio transients are a relatively unexplored population. The wide field-of-view and high instantaneous sensitivity of instruments such as MeerKAT provides an opportunity to probe this class of sources, using image-plane detection techniques. The previous letter in this series describes our project and associated Transient Radio Observations for Newbies (TRON) pipeline designed to mine archival MeerKAT data for transient and variable sources. In this letter, we report on a new transient, a radio flare, associated with Gaia DR3 6865945581361480448, a G type star, whose parallax places it at a distance of 1330 pc. Its duration and high degree of circular polarization suggests electron cyclotron maser instability as the mechanism, consistent with an RS CVn variable.

Abstract Copyright: © 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): methods: data analysis - techniques: interferometric - stars - radio continuum: transients

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 22468 RS* 03 36 47.2904292073 +00 35 15.943692002 7.09 6.79 5.90     K2:Vnk 1206 0
2 UCAC4 348-186976 RS* 20 07 30.2859689829 -20 35 49.121309895   16.241 15.145 14.873   ~ 1 0

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