Luminosity class of the symbiotic stars 4U1954+319 and ZZ CMi
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866917595642331136 |
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| author | Zamanov, R. Stoyanov, K. A. Latev, G. Marti, J. Takey, A. Elhosseiny, E. G. Christova, M. D. Minev, M. Vujcic, V. Moyseev, M. Marchev, V. |
| author_facet | Zamanov, R. Stoyanov, K. A. Latev, G. Marti, J. Takey, A. Elhosseiny, E. G. Christova, M. D. Minev, M. Vujcic, V. Moyseev, M. Marchev, V. |
| contents | 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 and estimate the interstellar reddening E(B-V)=0.83 +/- 0.09. Using GAIA distances and our photometry, we find (1) absolute V band magnitude of 4U1954+319 M_V=-5.23 +/- 0.08 and that the mass donor is a supergiant of luminosity class Ib, and (2) for ZZ CMi M_V=-0.27 +/- 0.2 and that the mass donor is a giant of luminosity class III. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_14378 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Luminosity class of the symbiotic stars 4U1954+319 and ZZ CMi Zamanov, R. Stoyanov, K. A. Latev, G. Marti, J. Takey, A. Elhosseiny, E. G. Christova, M. D. Minev, M. Vujcic, V. Moyseev, M. Marchev, V. Solar and Stellar Astrophysics 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 and estimate the interstellar reddening E(B-V)=0.83 +/- 0.09. Using GAIA distances and our photometry, we find (1) absolute V band magnitude of 4U1954+319 M_V=-5.23 +/- 0.08 and that the mass donor is a supergiant of luminosity class Ib, and (2) for ZZ CMi M_V=-0.27 +/- 0.2 and that the mass donor is a giant of luminosity class III. |
| title | Luminosity class of the symbiotic stars 4U1954+319 and ZZ CMi |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2402.14378 |