Stellar parameters from XP and RVS spectra Virtual Observatory Resource

Authors
  1. Huson D.
  2. Cowan I.
  3. Sizemore L.
  4. Kounkel M.
  5. Hutchinson B.
  6. Published by
    CDS
Abstract

We present a new processing of XP spectra for 220 million stars released in Gaia DR3. The new data model is capable of handling objects with Teff between 2000 and 50000K and with between 0 and 10, including objects of multitude of masses and evolutionary stages. This includes for the first time ever robust processing of spectroscopic parameters for pre-main-sequence stars, with sensitivity toward their age. Through this analysis we examine the distribution of young low-mass stars with ages of up to 20 Myr in the solar neighborhood, and we identify a new massive (>1000 stars) population, Ophion, which is found east of Sco-Cen. This population appears to be fully disrupted, with negligible kinematic coherence. Nonetheless, due its young age it appears to still persist as a spatial overdensity. Through improved determination of ages of the nearby stars, it may be possible to better recover the star-forming history of the solar neighborhood outside of the moving groups.

Keywords
  1. stellar-populations
  2. effective-temperature
  3. metallicity
  4. visible-astronomy
  5. spectroscopy
Bibliographic source Bibcode
2025ApJ...984...58H
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/984/58
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/984/58

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/984/58
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/984/58
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/984/58
IVOA Table Access TAP
https://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).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/984/58/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/984/58/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/984/58/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/984/58/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/984/58/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/984/58/table2?

History

2025-10-01T11:19:39Z
Resource record created
2025-10-01T11:19:39Z
Created
2025-10-01T11:45:18Z
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