GK Car and GZ Nor: two low-luminous, depleted RV Tauri stars

I. Gezer, H. Van Winckel, R. Manick, D. Kamath

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


RV Tauri stars are luminous population II Cepheids which show a characteristic light curve of alternating deep and shallow minima. There are 126 RV Tauri variables in our Galaxy. Using WISE [3.4]-[4.6], [12]-[22] diagram we show that Galactic RV Tauri stars show three main types of IR properties in their SEDs; disc-type, non-IR and uncertain, which does not show a clear characteristic in the SED. We also show that there is a strong correlation between disc-type SED and binarity (Gezer et al. 2015). RV Tauri stars were linked to post AGB stars in early studies (Jura 1986), however, recent studies show that their evolutionary nature is more complex than previously thought (Kamath & Van Winckel 2014, and Manick et al. 2018). In this study, we intentionally selected two RV Tauri stars, GK Car (disc-type) and GZ Nor (uncertain), with different IR characteristics to compare their chemical and photometric properties.

Original languageEnglish
Title of host publicationWhy galaxies care about AGB stars : a continuing challenge through cosmic time
Subtitle of host publicationProceedings of the 343rd Symposium of the International Astronomical Union held In Vienna, Austria 20–23 August, 2018
EditorsFranz Kerschbaum, Martin Groenewegen, Hans Olofsson
Place of PublicationCambridge
PublisherCambridge University Press
Number of pages2
ISBN (Print)9781108471527
Publication statusPublished - 30 Dec 2019
Event343rd Symposium of The International Astronomical Union - Vienna, Austria
Duration: 20 Aug 201823 Aug 2018

Publication series

NameProceedings of the International Astronomical Union
PublisherCambridge University Press
ISSN (Print)1743-9213


Conference343rd Symposium of The International Astronomical Union


  • stars: abundances
  • stars: AGB and post-AGB
  • stars: variables: Cepheids


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