Electron cyclotron maser emission from ejected stellar prominences on V374 Peg

C. E. Brasseur; M. M. Jardine; S. Daley-Yates; J. F. Donati; J. Morin

doi:10.1093/mnras/stag042

Electron cyclotron maser emission from ejected stellar prominences on V374 Peg

C. E. Brasseur, M. M. Jardine^*, S. Daley-Yates, J. F. Donati, J. Morin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We investigate a possible origin for bursty radio emission observed on the active M dwarf V374 Peg, combining data-driven magnetic field modelling with archival radio light curves. We examine whether stellar prominence ejection can plausibly account for the observed radio bursts that have been attributed to electron cyclotron maser (ECM) emission. Our analysis shows that ejected prominences can produce the required energy range to drive the emission, and that modelled ECM visibility exhibits a rotational phase dependence consistent with the limited observational data (four observed bursts). The results support prominence ejection as a viable mechanism for ECM generation on V374 Peg and motivate further observational campaigns to constrain this process.

Original language	English
Article number	stag042
Number of pages	12
Journal	Monthly Notices of the Royal Astronomical Society
Volume	546
Issue number	3
Early online date	10 Feb 2026
DOIs	https://doi.org/10.1093/mnras/stag042
Publication status	Published - 1 Mar 2026

Keywords

Stars: coronae
Stars: individual: V374 Peg
Stars: low-mass
Stars: magnetic fields

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10.1093/mnras/stag042Licence: CC BY

Brasseur_2026_MNRAS_Electron-cyclotron-maser-emission-V374-Peg_CC
© The Author(s) 2026. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Final published version, 4.86 MBLicence: CC BY

1 Finished
1 Active

CIRCE Co-rotating Interaction Regions Colliding with Exoplanets
Jardine, M. (PI)
STFC
1/04/25 → 31/03/28
Project: Standard
Astronomy at St Andrews 2018-2021: Astronomy at St Andrews 2018-2021
Jardine, M. (PI), Bonnell, I. (CoI), Cameron, A. (CoI), Cyganowski, C. (CoI), Dominik, M. (CoI), Helling, C. (CoI), Horne, K. (CoI), Scholz, A. (CoI), Tojeiro, R. (CoI), Weijmans, A.-M. (CoI), Wild, V. (CoI), Woitke, P. (CoI), Wood, K. (CoI) & Zhao, H. (CoI)
1/04/18 → 31/03/22
Project: Standard

Cite this

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title = "Electron cyclotron maser emission from ejected stellar prominences on V374 Peg",

abstract = "We investigate a possible origin for bursty radio emission observed on the active M dwarf V374 Peg, combining data-driven magnetic field modelling with archival radio light curves. We examine whether stellar prominence ejection can plausibly account for the observed radio bursts that have been attributed to electron cyclotron maser (ECM) emission. Our analysis shows that ejected prominences can produce the required energy range to drive the emission, and that modelled ECM visibility exhibits a rotational phase dependence consistent with the limited observational data (four observed bursts). The results support prominence ejection as a viable mechanism for ECM generation on V374 Peg and motivate further observational campaigns to constrain this process.",

keywords = "Stars: coronae, Stars: individual: V374 Peg, Stars: low-mass, Stars: magnetic fields",

author = "Brasseur, \{C. E.\} and Jardine, \{M. M.\} and S. Daley-Yates and Donati, \{J. F.\} and J. Morin",

note = "Funding: MMJ acknowledges support from STFC consolidated grant number ST/R000824/1. CEB acknowledges funding from the St Andrews GH Chaplin scholarship.",

year = "2026",

month = mar,

day = "1",

doi = "10.1093/mnras/stag042",

language = "English",

volume = "546",

journal = "Monthly Notices of the Royal Astronomical Society",

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T1 - Electron cyclotron maser emission from ejected stellar prominences on V374 Peg

AU - Brasseur, C. E.

AU - Jardine, M. M.

AU - Daley-Yates, S.

AU - Donati, J. F.

AU - Morin, J.

N1 - Funding: MMJ acknowledges support from STFC consolidated grant number ST/R000824/1. CEB acknowledges funding from the St Andrews GH Chaplin scholarship.

PY - 2026/3/1

Y1 - 2026/3/1

N2 - We investigate a possible origin for bursty radio emission observed on the active M dwarf V374 Peg, combining data-driven magnetic field modelling with archival radio light curves. We examine whether stellar prominence ejection can plausibly account for the observed radio bursts that have been attributed to electron cyclotron maser (ECM) emission. Our analysis shows that ejected prominences can produce the required energy range to drive the emission, and that modelled ECM visibility exhibits a rotational phase dependence consistent with the limited observational data (four observed bursts). The results support prominence ejection as a viable mechanism for ECM generation on V374 Peg and motivate further observational campaigns to constrain this process.

AB - We investigate a possible origin for bursty radio emission observed on the active M dwarf V374 Peg, combining data-driven magnetic field modelling with archival radio light curves. We examine whether stellar prominence ejection can plausibly account for the observed radio bursts that have been attributed to electron cyclotron maser (ECM) emission. Our analysis shows that ejected prominences can produce the required energy range to drive the emission, and that modelled ECM visibility exhibits a rotational phase dependence consistent with the limited observational data (four observed bursts). The results support prominence ejection as a viable mechanism for ECM generation on V374 Peg and motivate further observational campaigns to constrain this process.

KW - Stars: coronae

KW - Stars: individual: V374 Peg

KW - Stars: low-mass

KW - Stars: magnetic fields

U2 - 10.1093/mnras/stag042

DO - 10.1093/mnras/stag042

M3 - Article

SN - 0035-8711

VL - 546

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

M1 - stag042

ER -

Electron cyclotron maser emission from ejected stellar prominences on V374 Peg

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Projects

CIRCE Co-rotating Interaction Regions Colliding with Exoplanets

Astronomy at St Andrews 2018-2021: Astronomy at St Andrews 2018-2021

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