An all-sky view of the Orphan Stream Virtual Observatory Resource

Authors
  1. Koposov S.E.
  2. Belokurov V.
  3. Li T.S.
  4. Mateu C.
  5. Erkal D.
  6. Grillmair C.J.,Hendel D.
  7. Price-Whelan A.M.
  8. Laporte C.F.P.
  9. Hawkins K.
  10. Sohn S.T.,del Pino A.
  11. Evans N.W.
  12. Slater C.T.
  13. Kallivayalil N.
  14. Navarro J.F.,(the Oats: Orphan Aspen Treasury Collaboration)
  15. Published by
    CDS
Abstract

We use astrometry, broad-band photometry, and variability information from the Data Release 2 of ESA's Gaia mission (GDR2) to identify members of the Orphan Stream (OS) across the whole sky. The stream is traced above and below the celestial equator and in both Galactic hemispheres, thus increasing its visible length to ~210{deg} equivalent to ~150kpc in physical extent. Taking advantage of the large number of RR Lyrae stars in the OS, we extract accurate distances and proper motions across the entire stretch of the tidal debris studied. As delineated by the GDR2 RR Lyrae, the stream exhibits two prominent twists in its shape on the sky which are accompanied by changes in the tangential motion. We complement the RR Lyrae maps with those created using GDR2 Red Giants and the DECam Legacy Survey Main Sequence Turn-Off stars. The behaviour of the OS track on the sky is consistent across all three tracers employed. We detect a strong non-zero motion in the across-stream direction for a substantial portion of the stream. Such a misalignment between the debris track and the streaming velocity cannot be reproduced in a static gravitational potential and signals an interaction with a massive perturber.

Keywords
  1. milky-way-galaxy
  2. variable-stars
  3. halo-stars
  4. astrometry
  5. stellar-distance
  6. proper-motions
  7. visible-astronomy
Bibliographic source Bibcode
2019MNRAS.485.4726K
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/485/4726
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/485/4726
Document Object Identifer DOI
doi:10.26093/cds/vizier.74854726

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/485/4726
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/485/4726
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/485/4726
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).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/485/4726/table15?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/485/4726/table15?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/485/4726/table15?

History

2022-11-25T14:20:49Z
Resource record created
2022-11-25T14:20:49Z
Created
2024-08-19T20:17:45Z
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