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

    Abstract

    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 (CUP)
    Pages404-405
    Number of pages2
    ISBN (Print)9781108471527
    DOIs
    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
    NumberS343
    Volume14
    ISSN (Print)1743-9213

    Conference

    Conference343rd Symposium of The International Astronomical Union
    Country/TerritoryAustria
    CityVienna
    Period20/08/1823/08/18

    Keywords

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

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