The ASAS-SN catalogue of variable stars - VIII Virtual Observatory Resource

Authors
  1. Bredall J.W.
  2. Shappee B.J.
  3. Gaidos E.
  4. Jayasinghe T.
  5. Vallely P.,Stanek K.Z.
  6. Kochanek C.S.
  7. Gagne J.
  8. Hart K.
  9. Holoien T.W.-S.,Prieto J.L.
  10. Van Saders J.
  11. Published by
    CDS
Abstract

Some young stellar objects such as T Tauri-like 'dipper' stars vary due to transient partial occultation by circumstellar dust, and observations of this phenomenon inform us of conditions in the planet-forming zones close to these stars. Although many dipper stars have been identified with space missions such as Kepler/K2, ground-based telescopes offer longer term and multiwavelength perspectives. We identified 11 dipper stars in the Lupus star-forming region in data from the All-Sky Automated Survey for SuperNovae (ASAS-SN), and further characterized these using observations by the Las Cumbres Global Observatory Telescope (LCOGT) and the Transiting Exoplanet Survey Satellite (TESS), as well as archival data from other missions. Dipper stars were identified from a catalogue of nearby young stars and selected based on the statistical significance, asymmetry, and quasi-periodicity or aperiodicity of variability in their ASAS-SN light curves. All 11 stars lie above or redwards of the zero-age main sequence and have infrared (IR) excesses indicating the presence of full circumstellar discs. We obtain reddening-extinction relations for the variability of seven stars using our combined ASAS-SN-TESS and LCOGT photometry. In all cases, the slopes are below the ISM value, suggesting larger grains, and we find a tentative relation between the slope (grain size) and the K_s_-[22{mu}m] IR colour regarded as a proxy for disc evolutionary state.

Keywords
  1. variable-stars
  2. young-stellar-objects
  3. milky-way-galaxy
  4. stellar-spectral-types
  5. photometry
  6. visible-astronomy
Bibliographic source Bibcode
2020MNRAS.496.3257B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/3257
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/496/3257

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/496/3257
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/496/3257
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/496/3257
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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/496/3257/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/3257/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/3257/table2?

History

2023-10-12T15:23:37Z
Resource record created
2023-10-12T14:24:38Z
Updated
2023-10-12T15:23:37Z
Created

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