A Mini Atlas of H-Band Spectra of Southern Symbiotic Stars

0575666 - ASÚ 2024 RIV CH eng J - Journal Article
Marchiano, P. E. - Arias, M.L. - Kraus, Michaela - Kourniotis, Michail - Torres, A.F. - Cidale, L.S. - Fernandes, M.
A Mini Atlas of H-Band Spectra of Southern Symbiotic Stars.
Galaxies. Roč. 11, č. 4 (2023), č. článku 80. E-ISSN 2075-4434
R&D Projects: GA ČR(CZ) GA20-00150S
EU Projects: European Commission(XE) 823734 - POEMS
Institutional support: RVO:67985815
Keywords : spectroscopic techniques * binaries stars * infrared stars
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 2.5, year: 2022
Method of publishing: Open access

Symbiotic stars are interacting binary systems composed of an evolved star (generally a late-type red giant) and a degenerate or dwarf companion in orbit close enough for mass transfer to occur. Understanding the status of the late-type star is important for developing binary models for the symbiotic systems as it affects the transfer of matter needed to activate the hot component. Infrared observations have been very useful in probing the nature of late-type stars in symbiotic systems. This work presents a set of symbiotic stars observed with SOAR/OSIRIS (R & SIM, 3000) in the H-band. We aimed to search for possible molecular circumstellar emission, to characterize the cool companion in these systems, and to confront the new findings with those obtained from the previous K-band classifications. We detected molecular emission from just one object, BI Cru, which displays the second-overtone CO-bands. To fit the observed photospheric CO absorption bands, we used the MARCS atmosphere models. We present our results as a mini atlas of symbiotic stars in the near-infrared region to facilitate the comparison among different observed symbiotic systems.
Permanent Link: https://hdl.handle.net/11104/0345823