The remarkable evolution of the post-AGB star FG Sge

J. Jurcsik, Benjamín Montesinos

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

FG Sagittae is one of the most important key objects for post-AGB stellar evolutionary studies. As a consequence of a final helium shell flash, this unique variable has shown real evolutionary changes on human timescales during this century. The recently observed variations in the emission lines of the surrounding old planetary nebula prove that there is no hot exciting object hidden inside the nebula, thus there is only one central star, namely FG Sge itself. Consequently, we are witnessing the rapid evolution of a single star. Turning to an R CrB type variable in the early 90s, FG Sge also solved the question of the evolutionary state of this type of stars. Some aspects of the observational history of FG Sge are reviewed in this paper and compared with predictions from model calculation results.

Original languageEnglish
Pages (from-to)415-424
Number of pages10
JournalNew Astronomy Reviews
Volume43
Issue number6-7
Publication statusPublished - Sep 1999

Fingerprint

asymptotic giant branch stars
helium
shell
timescale
stars
history
prediction
planetary nebulae
nebulae
flash
histories
predictions
calculation

Keywords

  • Planetary nebulae: individual: He1-5
  • Stars: evolution
  • Stars: fundamental parameters
  • Stars: individual: FG Sge
  • Stars: oscillations
  • Stars: post-AGB
  • Stars: variables

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

The remarkable evolution of the post-AGB star FG Sge. / Jurcsik, J.; Montesinos, Benjamín.

In: New Astronomy Reviews, Vol. 43, No. 6-7, 09.1999, p. 415-424.

Research output: Contribution to journalArticle

Jurcsik, J & Montesinos, B 1999, 'The remarkable evolution of the post-AGB star FG Sge', New Astronomy Reviews, vol. 43, no. 6-7, pp. 415-424.
Jurcsik, J. ; Montesinos, Benjamín. / The remarkable evolution of the post-AGB star FG Sge. In: New Astronomy Reviews. 1999 ; Vol. 43, No. 6-7. pp. 415-424.
@article{550ecf47ca1d470b9285f0d1322d16e7,
title = "The remarkable evolution of the post-AGB star FG Sge",
abstract = "FG Sagittae is one of the most important key objects for post-AGB stellar evolutionary studies. As a consequence of a final helium shell flash, this unique variable has shown real evolutionary changes on human timescales during this century. The recently observed variations in the emission lines of the surrounding old planetary nebula prove that there is no hot exciting object hidden inside the nebula, thus there is only one central star, namely FG Sge itself. Consequently, we are witnessing the rapid evolution of a single star. Turning to an R CrB type variable in the early 90s, FG Sge also solved the question of the evolutionary state of this type of stars. Some aspects of the observational history of FG Sge are reviewed in this paper and compared with predictions from model calculation results.",
keywords = "Planetary nebulae: individual: He1-5, Stars: evolution, Stars: fundamental parameters, Stars: individual: FG Sge, Stars: oscillations, Stars: post-AGB, Stars: variables",
author = "J. Jurcsik and Benjam{\'i}n Montesinos",
year = "1999",
month = "9",
language = "English",
volume = "43",
pages = "415--424",
journal = "New Astronomy Reviews",
issn = "1387-6473",
publisher = "Elsevier",
number = "6-7",

}

TY - JOUR

T1 - The remarkable evolution of the post-AGB star FG Sge

AU - Jurcsik, J.

AU - Montesinos, Benjamín

PY - 1999/9

Y1 - 1999/9

N2 - FG Sagittae is one of the most important key objects for post-AGB stellar evolutionary studies. As a consequence of a final helium shell flash, this unique variable has shown real evolutionary changes on human timescales during this century. The recently observed variations in the emission lines of the surrounding old planetary nebula prove that there is no hot exciting object hidden inside the nebula, thus there is only one central star, namely FG Sge itself. Consequently, we are witnessing the rapid evolution of a single star. Turning to an R CrB type variable in the early 90s, FG Sge also solved the question of the evolutionary state of this type of stars. Some aspects of the observational history of FG Sge are reviewed in this paper and compared with predictions from model calculation results.

AB - FG Sagittae is one of the most important key objects for post-AGB stellar evolutionary studies. As a consequence of a final helium shell flash, this unique variable has shown real evolutionary changes on human timescales during this century. The recently observed variations in the emission lines of the surrounding old planetary nebula prove that there is no hot exciting object hidden inside the nebula, thus there is only one central star, namely FG Sge itself. Consequently, we are witnessing the rapid evolution of a single star. Turning to an R CrB type variable in the early 90s, FG Sge also solved the question of the evolutionary state of this type of stars. Some aspects of the observational history of FG Sge are reviewed in this paper and compared with predictions from model calculation results.

KW - Planetary nebulae: individual: He1-5

KW - Stars: evolution

KW - Stars: fundamental parameters

KW - Stars: individual: FG Sge

KW - Stars: oscillations

KW - Stars: post-AGB

KW - Stars: variables

UR - http://www.scopus.com/inward/record.url?scp=0007181071&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0007181071&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0007181071

VL - 43

SP - 415

EP - 424

JO - New Astronomy Reviews

JF - New Astronomy Reviews

SN - 1387-6473

IS - 6-7

ER -