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Other literature type . 2024
License: CC BY
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Conference object . 2024
License: CC BY
Data sources: Datacite
ZENODO
Conference object . 2024
License: CC BY
Data sources: Datacite
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M Dwarfs Variability in Magnetically Sensitive Balmer Emission Lines

Authors: Garcia Soto, Aylin; Newton, Elisabeth R.; Duvvuri, Girish M.; Núñez, Alejandro; Douglas, Stephanie T.;

M Dwarfs Variability in Magnetically Sensitive Balmer Emission Lines

Abstract

M Dwarfs, predominant among stars, offer a promising path for discovering Earth-size exoplanets due to their smaller sizes. Yet, their intense magnetic activity poses challenges for exoplanet detection and characterization, with active regions mimicking planetary signals in radial velocity and transmission spectroscopy. Understanding M dwarf magnetic activity, from internal dynamos to surface starspots, is vital for advancing exoplanet research. We monitored Hα, Hβ, Hγ and Hδ emission lines in 14 M Dwarfs to study short-term variability and emission sources. The sample consists of fully convective M Dwarfs at various evolutionary states, including young stars, T Tauri stars, and main sequence stars, as well as binaries and single stars. Spectra were obtained using the MDM Observatory's Ohio State Multi-Object Spectrograph on the 2.4m Hiltner Telescope, combined with TESS photometry to investigate evolving spot morphology and rotation periods. Sporadic short-term variability (equivalent width differences around -1 angstroms) in Balmer lines was observed in some stars, occurring on timescales (~ 15-60 min) much shorter than stellar rotation periods. In this poster, we quantify the type of variability we are seeing but also how its similar or different between each Balmer line. We also re-examine the amplitude-activity relation.

Related Organizations
Keywords

stars: balmer lines, stars: chromospheres, stars: M dwarfs, stars: activity, stars: halpha emission, stars: instrinsic variability, stars: low-mass stars, stars: balmer decrement

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green