Luminosity class of the symbiotic stars 4U1954+319 and ZZ CMi
| Autor: | Zamanov R., Stoyanov K.A., Latev G., Marti J., Takey A., Elhosseiny E.G., Christova M.D., Minev M., Vujčić V., Moyseev M., Marchev V. |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Serbian Astronomical Journal, Vol 2024, Iss 208, Pp 41-46 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1450-698X 1820-9289 |
| DOI: | 10.2298/SAJ240206002Z |
| Popis: | We performed optical photometry and spectral observations of the symbiotic stars 4U1954+319 and ZZ CMi. For 4U1954+319, using high-resolution spectra, we, measure the equivalent widths of diffuse interstellar bands (DIBs) and estimate the interstellar reddening E(B-V ) = 0:83±0:09. Using the GAIA distances and our photometry, we find: (1) the absolute V -band magnitude MV =-5:23 ± 0:08 of 4U1954+319 and that the mass donor is a supergiant of luminosity class Ib, and (2) MV = -0:27±0:2 for ZZ CMi and that the mass donor is a giant of luminosity class III. |
| Databáze: | Directory of Open Access Journals |
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