M Dwarf Stellar Activity Data Within 10 Parsecs

159 M dwarf stars within 10 parsecs of Earth, selected from the All-Sky Catalog of bright M dwarfs. The dataset combines archival ROSAT, XMM-Newton, and GALEX data with published H-alpha emission and rotation studies to analyze high-energy stellar activity. It was created by the HEASARC in July 2017 based on CDS catalog data.

Use Cases

• Modeling stellar magnetic activity based on X-ray and ultraviolet flux measurements.
• Studying the age-activity relationship for M dwarfs based on comparisons with a young stellar association sample.
• Analyzing flux-flux power-law dependencies between H-alpha, NUV, FUV, and X-ray emission.
• Investigating the spread of activity indices and rotation rates across different M dwarf spectral types.

Strengths

• Nearly volume-limited sample with an estimated 90% completeness for M dwarfs within 10 parsecs.
• Combines multi-wavelength data from ROSAT, XMM-Newton, and GALEX with spectroscopic and rotation studies.
• Includes a comparison sample of young M dwarfs from the TW Hya association (~10 Myr old).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect observational bias inherent to the source archival surveys.

Provenance

Source

National Aeronautics and Space Administration (NASA), HEASARC.

Collection Method

Archival data from ROSAT, XMM-Newton, and GALEX combined with published spectroscopic studies.

Time Range

Observational data likely spans the operational periods of the source telescopes.

Freshness

Last updated 2026-03 13 20:09:26.329297; freshness should be verified.

Geography

All-sky survey, targeting stars within 10 parsecs of Earth.