Origin of stellar flares on M dwarfs using TESS Virtual Observatory Resource

Authors
  1. Doyle L.
  2. Ramsay G.
  3. Doyle J.G.
  4. Wu K.
  5. Published by
    CDS
Abstract

Detailed studies of the Sun have shown that sunspots and solar flares are closely correlated. Photometric data from Kepler/K2 has allowed similar studies to be carried out on other stars. Here, we utilize Transiting Exoplanet Survey Satellite (TESS) photometric 2-min cadence of 167 low-mass stars from Sectors 1 to 3 to investigate the relationship between star-spots and stellar flares. From our sample, 90 per cent show clear rotational modulation likely due to the presence of a large, dominant star-spot and we use this to determine a rotational period for each star. Additionally, each low-mass star shows one or more flares in its light curve and using Gaia Data Release 2 parallaxes and SkyMapper magnitudes we can estimate the energy of the flares in the TESS band-pass. Overall, we have 1834 flares from the 167 low-mass stars with energies from 6.0x10^29^ to 2.4x10^35^erg. We find none of the stars in our sample show any preference for rotational phase, suggesting the lack of a correlation between the large, dominant star-spot, and flare number. We discuss this finding in greater detail and present further scenarios to account for the origin of flares on these low-mass stars.

Keywords
  1. Stellar flares
  2. Magnetic fields
  3. M stars
  4. Dwarf stars
  5. Infrared photometry
  6. Optical astronomy
  7. Wide-band photometry
  8. Stellar spectral types
  9. Trigonometric parallax
  10. Stellar distance
Bibliographic source Bibcode
2019MNRAS.489..437D
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/489/437
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/489/437

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/489/437
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/489/437
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/489/437
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/489/437/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/489/437/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/489/437/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/489/437/tablea1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/489/437/tablea1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/489/437/tablea1?

History

2023-02-09T13:27:06Z
Resource record created
2023-02-09T13:27:06Z
Created
2023-03-16T06:50:47Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr