DW Cnc H{alpha} and HeI RV curves Virtual Observatory Resource

Authors
  1. Segura Montero O.
  2. Ramirez S.H.
  3. Echevarria J.
  4. Published by
    CDS
Abstract

We present extensive radial velocity observations of the intermediate polar DW Cnc during its 2018-2019 low state. We show that the 86 min signal associated with the orbital period is strong in our radial velocity analysis, power spectrum search, and in our Doppler tomography. However, we find that the velocity modulation associated with the 70 min beat period and the 38 min spin cycle is dramatically weaker than that previously observed. We put forward two interpretations for this change. The first is that a sudden drop into a low state detected in 2018-2019 caused an episode of low mass transfer from the companion, thus inhibiting the lighthouse effect produced by the rebound emission. The second is that this is a consequence of a rare outburst detected in 2007 by Crawford et al. (2008, J. Am. Assoc. Var. Star Obs., 36, 60). We find this post-outburst hypothesis to be less likely. If the first scenario is correct, we predict that DW Cnc will recover its intermediate polar characteristics. A new ephemeris is presented by combining Patterson et al. (2004PASP..116..516P) radial velocities with ours.

Keywords
  1. Variable stars
  2. Cataclysmic variable stars
  3. Radial velocity
Bibliographic source Bibcode
2020MNRAS.494.4110S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/494/4110
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/494/4110

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/494/4110
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/494/4110
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/494/4110
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2020-07-28T14:53:20Z
Resource record created
2020-07-28T14:53:20Z
Created
2021-09-07T11:31:16Z
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