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Symbiotic star (SySt) is long-period interacting binary system, typically consisting of a white dwarf and a red giant surrounded by a nebula. These systems are natural astrophysical laboratories for investigating binary star evolution. In…

Solar and Stellar Astrophysics · Physics 2025-06-12 Jing Chen , Liang Wang , Yin-Bi Li , Xiao-Xiao Ma , A-Li Luo , Zi-Chong Zhang , Ming-Yi Ding , Kai Zhang

Symbiotic stars are interacting binary systems, making them valuable for studying various astronomical phenomena, such as stellar evolution, mass transfer, and accretion processes. Despite recent progress in the discovery of symbiotic…

Solar and Stellar Astrophysics · Physics 2023-07-20 Yongle Jia , Sufen Guo , Chunhua Zhu , Lin Li , Mei Ma , Guoliang Lv

In this second paper in a series of papers based on the most-up-to-date catalogue of symbiotic stars (SySts), we present a new approach for identifying and distinguishing SySts from other Halpha emitters in photometric surveys using machine…

Solar and Stellar Astrophysics · Physics 2019-01-16 Stavros Akras , Marcelo L. Leal-Ferreira , Lizette Guzman-Ramirez , Gerardo Ramos-Larios

Theoretical predictions of the population of Galactic symbiotic stars (SySts) are highly inconsistent with the current known population. Despite intense effort over the past decades, observations are still far below the predictions. The…

Solar and Stellar Astrophysics · Physics 2023-01-20 Stavros Akras

Symbiotic stars, binary pairs with a cool giant fueling accretion onto a hot compact companion, offer unique insights to our understanding of stellar evolution. Yet, only a few hundred symbiotic stars are confirmed. Here, we report on a new…

Solar and Stellar Astrophysics · Physics 2025-08-27 Samantha E. Ball , Benjamin C. Bromley , Scott J. Kenyon

We present the continuation of a systematic search for new southern Galactic symbiotic stars, selecting candidates from the SuperCOSMOS H$\alpha$ Survey and 2MASS. Follow-up spectroscopy with the Southern African Large Telescope (SALT) was…

Solar and Stellar Astrophysics · Physics 2025-12-19 J. Merc , J. Mikołajewska , K. Iłkiewicz , B. Monard , A. Udalski

Symbiotic stars are interacting binary systems with the longest orbital periods. They are typically formed by a white dwarf, a red giant and a nebula. These objects are natural astrophysical laboratories for studying the evolution of…

We present a new updated catalogue of Galactic and extragalactic symbiotic stars (SySts). Since the last catalogue of SySts (Belczynski et al. 2000), the number of known SySts has significantly increased. Our new catalogue contains 316…

Solar and Stellar Astrophysics · Physics 2017-02-01 Stavros Akras , Lizette Guzman-Ramirez , Marcelo Leal-Ferreira , Gerardo Ramos-Larios

Symbiotic stars (SySts) are long-period interacting binaries composed of a hot compact star, an evolved giant star, and a tangled network of gas and dust nebulae. They represent unique laboratories for studying a variety of important…

We have identified a first group of 33 new candidates for symbiotic stars (SySt) of the accreting-only variety among the 600,255 stars so far observed by the GALAH high-resolution spectroscopic survey of the Southern Hemisphere, more than…

We present a new census of Galactic and extragalactic symbiotic stars (SySts). This compilation contains 323 known and 87 candidate SySts. Of the confirmed SySts, 257 are Galactic and 66 extragalactic. The spectral energy distributions…

Solar and Stellar Astrophysics · Physics 2019-02-06 Stavros Akras , Lizette Guzman-Ramirez , Marcelo L. Leal-Ferreira , Gerardo Ramos-Larios

The study of symbiotic stars is essential to understand important aspects of stellar evolution in interacting binaries. Their observed population in the Galaxy is however poorly known, and is one to three orders of magnitudes smaller than…

Symbiotic stars are among the most crucial binary systems for studying binary star interactions and Type Ia supernova progenitors. Based on the unique observational characteristics of symbiotic stars, strong H I, He I emission lines, giant…

Solar and Stellar Astrophysics · Physics 2025-07-29 Yabing Zhao , Sufen Guo , Guoliang Lv , Jiao Li , Chunhua Zhu , Jianrong Shi

Symbiotic stars are binaries in which a cool and evolved star of luminosity class I-III accretes onto a smaller companion. However, direct accretion signatures like disc flickering and boundary layer X-rays are typically outshone or…

About 3,500 planetary nebulae (PNe) are currently known in the Milky Way, which shows a great discrepancy with the expected number for these objects, regardless of the reference used, $33-59 \times 10^{3}$. The same holds for symbiotic…

Astrophysics of Galaxies · Physics 2024-04-10 Giovanna Liberato , Denise R. Gonçalves , Luis A. Gutiérrez-Soto , Stavros Akras

We report the validation of a recently proposed infrared selection criterion for symbiotic stars (SySts). Spectroscopic data were obtained for seven candidates, selected from the SySt candidates of Akras et al. (2019, MNRAS, 483, 5077) by…

Solar and Stellar Astrophysics · Physics 2021-02-17 Stavros Akras , Denise R. Gonçalves , Alvaro Alvarez-Candal , Claudio B. Pereira

Symbiotic stars (SySt) are binaries composed of a star in the later stages of evolution and a stellar remnant. The enhanced mass-loss from the giant drives interacting mass exchange and makes these systems laboratories for understanding…

Solar and Stellar Astrophysics · Physics 2017-01-04 Cezary Galan , Joanna Mikolajewska , Kenneth H. Hinkle , Richard R. Joyce

We introduce the first results from an ongoing, systematic survey for new symbiotic stars selected from the AAO/UKST SuperCOSMOS H$\alpha$ Survey (SHS). The survey aims to identify and characterise the fainter population of symbiotic stars…

Solar and Stellar Astrophysics · Physics 2015-06-17 Brent Miszalski , Joanna Mikołajewska

We have carried out a detailed study of symbiotic stars with white dwarf accretors by means of a population synthesis code. We estimate the total number of symbiotic stars with white dwarf accretors in the Galaxy as 1,200 - 15,000. This…

Astrophysics · Physics 2009-11-11 Guoliang Lu , Lev Yungelson , Zhanwen Han

Binary stars are gravitationally bound stellar systems where the evolution of each component can significantly influence the evolution of its companion and the system as a whole. In certain cases, the evolution of these systems can lead to…

Astrophysics of Galaxies · Physics 2025-06-11 Marco Laversveiler , Denise R. Gonçalves , Helio J. Rocha-Pinto , Jaroslav Merc
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