Shocks in Novae and in Symbiotic Stars

1995 ◽  
pp. 277-280
Author(s):  
M. Contini
Keyword(s):  
Symbiotic Stars

Symbiotic Stars at Optical, Infrared and Radio Wavelengths

1979 ◽  
Vol 46 ◽  
pp. 125-149 ◽  
Author(s):  
David A. Allen
Keyword(s):  
Temperature Regime ◽  
Type Star ◽  
Stellar Systems ◽  
Symbiotic Stars ◽  
Lower Excitation ◽  
Definition Of ◽  
Original Type

No paper of this nature should begin without a definition of symbiotic stars. It was Paul Merrill who, borrowing on his botanical background, coined the termsymbioticto describe apparently single stellar systems which combine the TiO absorption of M giants (temperature regime ≲ 3500 K) with He II emission (temperature regime ≳ 100,000 K). He and Milton Humason had in 1932 first drawn attention to three such stars: AX Per, CI Cyg and RW Hya. At the conclusion of the Mount Wilson Ha emission survey nearly a dozen had been identified, and Z And had become their type star. The numbers slowly grew, as much because the definition widened to include lower-excitation specimens as because new examples of the original type were found. In 1970 Wackerling listed 30; this was the last compendium of symbiotic stars published.

Discovery of five new Galactic symbiotic stars in the VPHAS+ survey

2021 ◽  
Vol 502 (2) ◽  
pp. 2513-2517
Author(s):  
Stavros Akras ◽  
Denise R Gonçalves ◽  
Alvaro Alvarez-Candal ◽  
Claudio B Pereira
Keyword(s):  
Spectroscopic Data ◽  
Selection Criterion ◽  
Optical Spectra ◽  
Emission Lines ◽  
High Rate ◽  
Symbiotic Stars ◽  
Selection Of

ABSTRACT We report the validation of a recently proposed infrared (IR) selection criterion for symbiotic stars (SySts). Spectroscopic data were obtained for seven candidates, selected from the SySt candidates of Akras et al. by employing the new supplementary IR selection criterion for SySts in the VST/OmegaCAM Photometric H-Alpha Survey. Five of them turned out to be genuine SySts after the detection of H α, He ii, and [O iii] emission lines as well as TiO molecular bands. The characteristic O vi Raman-scattered line is also detected in one of these SySts. According to their IR colours and optical spectra, all five newly discovered SySts are classified as S-type. The high rate of true SySts detections of this work demonstrates that the combination of the H α emission and the new IR criterion improves the selection of target lists for follow-up observations by minimizing the number of contaminants and optimizing the observing time.

scholarly journals Discovery of true, likely and possible symbiotic stars in the dwarf spheroidal NGC 205★

2014 ◽  
Vol 447 (1) ◽  
pp. 993-1000 ◽  
Author(s):  
Denise R. Gonçalves ◽  
Laura Magrini ◽  
Ignacio G. de la Rosa ◽  
Stavros Akras
Keyword(s):  
Symbiotic Stars

Observations of the symbiotic stars AS 296, AS 360, and AS 338 during outbursts

Astrophysics ◽  
1987 ◽  
Vol 25 (2) ◽  
pp. 487-491
Author(s):  
V. F. Esipov ◽  
A. P. Ipatov ◽  
B. F. Yudin
Keyword(s):  
Symbiotic Stars

The properties of hard X-ray emitting symbiotic stars

2011 ◽  
Vol 47 (11) ◽  
pp. 1999-2003 ◽  
Author(s):  
R.N.C. Eze
Keyword(s):  
Symbiotic Stars ◽  
X Ray

scholarly journals Broad Wings around Hα and Hβ in the Two S-type Symbiotic Stars Z Andromedae and AG Draconis

2018 ◽  
Vol 866 (2) ◽  
pp. 129 ◽  
Author(s):  
Seok-Jun Chang ◽  
Hee-Won Lee ◽  
Ho-Gyu Lee ◽  
Narae Hwang ◽  
Sang-Hyeon Ahn ◽  
...  
Keyword(s):  
Symbiotic Stars

scholarly journals A machine learning approach for identification and classification of symbiotic stars using 2MASS and WISE

2018 ◽  
Vol 483 (4) ◽  
pp. 5077-5104 ◽  
Author(s):  
Stavros Akras ◽  
Marcelo L Leal-Ferreira ◽  
Lizette Guzman-Ramirez ◽  
Gerardo Ramos-Larios
Keyword(s):  
Machine Learning ◽  
Learning Approach ◽  
Symbiotic Stars ◽  
Machine Learning Approach

scholarly journals Rotational velocities of the giants in symbiotic stars - II. Are S-type symbiotics synchronized?★

2007 ◽  
Vol 380 (3) ◽  
pp. 1053-1063 ◽  
Author(s):  
R. K. Zamanov ◽  
M. F. Bode ◽  
C. H. F. Melo ◽  
R. Bachev ◽  
A. Gomboc ◽  
...  
Keyword(s):  
Symbiotic Stars

scholarly journals 29. Stellar Spectra

1982 ◽  
Vol 18 (1) ◽  
pp. 343-360 ◽  
Author(s):  
W.K. Bonsack
Keyword(s):  
Stellar Evolution ◽  
Working Group ◽  
Main Sequence ◽  
Symbiotic Stars ◽  
Be Stars ◽  
Stellar Spectra ◽  
Chemically Peculiar ◽  
Peculiar Stars ◽  
Chemically Peculiar Stars ◽  
Ap Stars

During the interval covered by this report, Commission 29 has sponsored or cosponsored the following IAU meetings: Symposium 98 on “Be Stars,” Munich, FRG, April 1981; Colloquium 59, “Effects of Mass-Loss on Stellar Evolution,” Trieste, Italy, September 1980; and Colloquim 70, “The Nature of Symbiotic Stars,” Haute-Provence, France, August 1981. In addition, Commission 29, through its Working Group on Ap Stars, collaborated in the organization of the 23rd Liege International Astrophysical Symposium on Upper Main-Sequence Chemically Peculiar Stars. Several IAU symposia and colloquia proposed for 1982 and 1983 are also cosponsored by Commission 29.

scholarly journals Searching for Type la Supernova Progenitors

1996 ◽  
Vol 145 ◽  
pp. 77-85
Author(s):  
Alvio Renzini
Keyword(s):  
Mass Star ◽  
Symbiotic Stars ◽  
The Status ◽  
A Minor

The status for the identification of specific astronomical objects as SNIa progenitors is reviewed. Single or double degenerate progenitors? Chandrasekhar or sub-Chandrasekhar mass exploders? These are the two main questions still to be answered concerning the progenitors of Type la supernovae. Although all four combinations may be represented in nature, searches for double degenerates seem to indicate that such systems provide a minor channel for the production of SNIa’s. The more promising candidates appear to be symbiotic stars, consisting of a single degenerate star and a sub-Chandrasekhar mass star.

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