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

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

doi:10.1017/S1743921318007056

GK Car and GZ Nor

two low-luminous, depleted RV Tauri stars

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

Department of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution

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 language	English
Title of host publication	Why galaxies care about AGB stars : a continuing challenge through cosmic time
Subtitle of host publication	Proceedings of the 343rd Symposium of the International Astronomical Union held In Vienna, Austria 20–23 August, 2018
Editors	Franz Kerschbaum, Martin Groenewegen, Hans Olofsson
Place of Publication	Cambridge
Publisher	Cambridge University Press
Pages	404-405
Number of pages	2
ISBN (Print)	9781108471527
DOIs	https://doi.org/10.1017/S1743921318007056
Publication status	Published - 30 Dec 2019
Event	343rd Symposium of The International Astronomical Union - Vienna, Austria Duration: 20 Aug 2018 → 23 Aug 2018

Publication series

Name	Proceedings of the International Astronomical Union
Publisher	Cambridge University Press
Number	S343
Volume	14
ISSN (Print)	1743-9213

Conference

Conference	343rd Symposium of The International Astronomical Union
Country	Austria
City	Vienna
Period	20/08/18 → 23/08/18

Keywords

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

Access to Document

10.1017/S1743921318007056

Link to publication in Scopus

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Gezer, I., Van Winckel, H., Manick, R., & Kamath, D. (2019). GK Car and GZ Nor: two low-luminous, depleted RV Tauri stars. In F. Kerschbaum, M. Groenewegen, & H. Olofsson (Eds.), Why galaxies care about AGB stars : a continuing challenge through cosmic time: Proceedings of the 343rd Symposium of the International Astronomical Union held In Vienna, Austria 20–23 August, 2018 (pp. 404-405). (Proceedings of the International Astronomical Union; Vol. 14, No. S343). Cambridge: Cambridge University Press. https://doi.org/10.1017/S1743921318007056

Gezer, I. ; Van Winckel, H. ; Manick, R. ; Kamath, D. / GK Car and GZ Nor : two low-luminous, depleted RV Tauri stars. Why galaxies care about AGB stars : a continuing challenge through cosmic time: Proceedings of the 343rd Symposium of the International Astronomical Union held In Vienna, Austria 20–23 August, 2018. editor / Franz Kerschbaum ; Martin Groenewegen ; Hans Olofsson. Cambridge : Cambridge University Press, 2019. pp. 404-405 (Proceedings of the International Astronomical Union; S343).

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

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.",

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Gezer, I, Van Winckel, H, Manick, R & Kamath, D 2019, GK Car and GZ Nor: two low-luminous, depleted RV Tauri stars. in F Kerschbaum, M Groenewegen & H Olofsson (eds), Why galaxies care about AGB stars : a continuing challenge through cosmic time: Proceedings of the 343rd Symposium of the International Astronomical Union held In Vienna, Austria 20–23 August, 2018. Proceedings of the International Astronomical Union, no. S343, vol. 14, Cambridge University Press, Cambridge, pp. 404-405, 343rd Symposium of The International Astronomical Union, Vienna, Austria, 20/08/18. https://doi.org/10.1017/S1743921318007056

GK Car and GZ Nor : two low-luminous, depleted RV Tauri stars. / Gezer, I.; Van Winckel, H.; Manick, R.; Kamath, D.

Why galaxies care about AGB stars : a continuing challenge through cosmic time: Proceedings of the 343rd Symposium of the International Astronomical Union held In Vienna, Austria 20–23 August, 2018. ed. / Franz Kerschbaum; Martin Groenewegen; Hans Olofsson. Cambridge : Cambridge University Press, 2019. p. 404-405 (Proceedings of the International Astronomical Union; Vol. 14, No. S343).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution

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AU - Kamath, D.

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AB - 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.

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BT - Why galaxies care about AGB stars : a continuing challenge through cosmic time

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Gezer I, Van Winckel H, Manick R, Kamath D. GK Car and GZ Nor: two low-luminous, depleted RV Tauri stars. In Kerschbaum F, Groenewegen M, Olofsson H, editors, Why galaxies care about AGB stars : a continuing challenge through cosmic time: Proceedings of the 343rd Symposium of the International Astronomical Union held In Vienna, Austria 20–23 August, 2018. Cambridge: Cambridge University Press. 2019. p. 404-405. (Proceedings of the International Astronomical Union; S343). https://doi.org/10.1017/S1743921318007056