TW Hydrae association with X-shooter Virtual Observatory Resource

Authors
  1. Venuti L.
  2. Stelzer B.
  3. Alcala J.M.
  4. Manara C.F.
  5. Frasca A.
  6. Jayawardhana R.,Antoniucci S.
  7. Argiroffi C.
  8. Natta A.
  9. Nisini B.
  10. Randich S.
  11. Scholz A.
  12. Published by
    CDS
Abstract

Measurements of the protoplanetary disk frequency in young star clusters of different ages indicate disk lifetimes <10Myr. However, our current knowledge of how mass accretion in young stars evolves over the lifespans of disks is subject to many uncertainties, especially at the lower stellar masses. In this study, we investigate ongoing accretion activity in the TW Hydrae association (TWA), the closest association of pre-main sequence stars with active disks. The age (8-10Myr) and the proximity of the TWA render it an ideal target to probe the final stages of disk accretion down to brown dwarf masses. The study is based on homogeneous spectroscopic data from 300nm to 2500nm, obtained synoptically with X-shooter, which allows simultaneous derivation of individual extinction, stellar parameters, and accretion parameters for each star. The continuum excess emission diagnostics is used to estimate the accretion luminosities and mass accretion rates of our disk-bearing targets, and the shape and intensity of permitted and forbidden emission lines are analyzed to probe the physics of the star-disk interaction environment.

Keywords
  1. m-stars
  2. pre-main-sequence-stars
  3. accretion
  4. spectroscopy
  5. infrared-astronomy
  6. ultraviolet-astronomy
Bibliographic source Bibcode
2019A&A...632A..46V
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/632/A46
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/632/A46
Document Object Identifer DOI
doi:10.26093/cds/vizier.36320046

Access

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History

2019-11-26T08:24:01Z
Resource record created
2019-11-26T08:24:01Z
Created
2020-04-07T08:13:24Z
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