Optical follow-up of ASAS-SN M dwarf flares Virtual Observatory Resource

Authors
  1. Schmidt S.J.
  2. Shappee B.J.
  3. van Saders J.L.
  4. Stanek K.Z.
  5. Brown J.S.,Kochanek C.S.
  6. Dong S.
  7. Drout M.R.
  8. Frank S.
  9. Holoien T.W.-S.
  10. Johnson S.,Madore B.F.
  11. Prieto J.L.
  12. Seibert M.
  13. Seidel M.K.
  14. Simonian G.V.A.
  15. Published by
    CDS
Abstract

The All-sky Automated Survey for Supernovae (ASAS-SN) is the only project in existence to scan the entire sky in optical light approximately every day, reaching a depth of g~18mag. Over the course of its first 4yr of transient alerts (2013-2016), ASAS-SN observed 53 events classified as likely M dwarf flares. We present follow-up photometry and spectroscopy of all 53 candidates, confirming flare events on 47 M dwarfs, one K dwarf, and one L dwarf. The remaining four objects include a previously identified T Tauri star, a young star with outbursts, and two objects too faint to confirm. A detailed examination of the 49 flare star light curves revealed an additional six flares on five stars, resulting in a total of 55 flares on 49 objects ranging in V-band contrast from {Delta}V=-1 to -10.2mag. Using an empirical flare model to estimate the unobserved portions of the flare light curve, we obtain lower limits on the V-band energy emitted during each flare, spanning log(E_V_/erg)=32-35, which are among the most energetic flares detected on M dwarfs. The ASAS-SN M dwarf flare stars show a higher fraction of H{alpha} emission, as well as stronger H{alpha} emission, compared to M dwarfs selected without reference to activity, consistent with belonging to a population of more magnetically active stars. We also examined the distribution of tangential velocities, finding that the ASAS-SN flaring M dwarfs are likely to be members of the thin disk and are neither particularly young nor old.

Keywords
  1. visible-astronomy
  2. spectroscopy
  3. m-stars
  4. stellar-flares
  5. infrared-photometry
  6. photometry
  7. line-intensities
  8. proper-motions
  9. stellar-spectral-types
Bibliographic source Bibcode
2019ApJ...876..115S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/876/115
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/876/115
Document Object Identifer DOI
doi:10.26093/cds/vizier.18760115

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/876/115
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/876/115
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/876/115
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/ApJ/876/115/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/876/115/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/876/115/table2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/876/115/flarestars?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/876/115/flarestars?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/876/115/flarestars?

History

2021-01-18T08:35:24Z
Resource record created
2021-01-18T08:35:24Z
Created
2022-01-18T15:06:46Z
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