SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. II. NGC 5662 AND V CEN
We present the results of a spectroscopic and photometric investigation of 15 objects from the open cluster NGC 5662, which contains the Cepheid V Cen. Besides the Cepheid, we studied one G-supergiant, two K-giants, four B-giants, and seven main sequence stars. Radial velocities (RV), v sin i, Teff,...
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| Format: | Article |
| Language: | English |
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Odessa I. I. Mechnykov National University
2018-10-01
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| Series: | Odessa Astronomical Publications |
| Online Access: | http://oap.onu.edu.ua/article/view/145381 |
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| author | I. A. Usenko A. Yu. Kniazev V. V. Kovtyukh T. V. Mishenina A. S. Miroshnichenko D. G. Turner Yu. I. Protsyuk |
| author_facet | I. A. Usenko A. Yu. Kniazev V. V. Kovtyukh T. V. Mishenina A. S. Miroshnichenko D. G. Turner Yu. I. Protsyuk |
| author_sort | I. A. Usenko |
| collection | DOAJ |
| description | We present the results of a spectroscopic and photometric investigation of 15 objects from the open cluster NGC 5662, which contains the Cepheid V Cen. Besides the Cepheid, we studied one G-supergiant, two K-giants, four B-giants, and seven main sequence stars. Radial velocities (RV), v sin i, Teff, log g, and [Fe/H] were determined using model fitting. We have derived the color-excesses, reddenings, and intrinsic colors for these stars to determine their true Teff and log g from comparison to the atmophere models, especially for hot stars, and to determine their absolute magnitudes. RV and GAIA DR2 2018 parallax/distance values for these stars allowed us to determine their membership in the cluster and to construct it 3D kinematic models. These parallaxes and reddenings led to the distances in a range of 700– 875 pc, while photometric MV gave the distances of 550–660 pc. Two objects from our list were found to be non-members of the cluster, and two other objects to be background stars. All members have [Fe/H] = −0.1±0.04 dex. The main sequence stars and B-giants have abundances of C, N, and Na close to the solar one, while the cool supergiants and giants show a deficit of carbon, an overabundance of nitrogen, and a small overabundance or close to the solar sodium content.
Two Li-rich K-giants, HD 127733 and HD 127753, were discovered in the cluster. |
| first_indexed | 2024-04-13T05:26:30Z |
| format | Article |
| id | doaj.art-3680c17013d94076b04e810f8d364582 |
| institution | Directory Open Access Journal |
| issn | 1810-4215 |
| language | English |
| last_indexed | 2024-04-13T05:26:30Z |
| publishDate | 2018-10-01 |
| publisher | Odessa I. I. Mechnykov National University |
| record_format | Article |
| series | Odessa Astronomical Publications |
| spelling | doaj.art-3680c17013d94076b04e810f8d3645822022-12-22T03:00:34ZengOdessa I. I. Mechnykov National UniversityOdessa Astronomical Publications1810-42152018-10-0131011712210.18524/1810-4215.2018.31.145381145381SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. II. NGC 5662 AND V CENI. A. Usenko0A. Yu. KniazevV. V. KovtyukhT. V. MisheninaA. S. MiroshnichenkoD. G. TurnerYu. I. ProtsyukAstronomical Observatory, Odessa National University; Mykolaiv Astronomical ObservatoryWe present the results of a spectroscopic and photometric investigation of 15 objects from the open cluster NGC 5662, which contains the Cepheid V Cen. Besides the Cepheid, we studied one G-supergiant, two K-giants, four B-giants, and seven main sequence stars. Radial velocities (RV), v sin i, Teff, log g, and [Fe/H] were determined using model fitting. We have derived the color-excesses, reddenings, and intrinsic colors for these stars to determine their true Teff and log g from comparison to the atmophere models, especially for hot stars, and to determine their absolute magnitudes. RV and GAIA DR2 2018 parallax/distance values for these stars allowed us to determine their membership in the cluster and to construct it 3D kinematic models. These parallaxes and reddenings led to the distances in a range of 700– 875 pc, while photometric MV gave the distances of 550–660 pc. Two objects from our list were found to be non-members of the cluster, and two other objects to be background stars. All members have [Fe/H] = −0.1±0.04 dex. The main sequence stars and B-giants have abundances of C, N, and Na close to the solar one, while the cool supergiants and giants show a deficit of carbon, an overabundance of nitrogen, and a small overabundance or close to the solar sodium content. Two Li-rich K-giants, HD 127733 and HD 127753, were discovered in the cluster.http://oap.onu.edu.ua/article/view/145381 |
| spellingShingle | I. A. Usenko A. Yu. Kniazev V. V. Kovtyukh T. V. Mishenina A. S. Miroshnichenko D. G. Turner Yu. I. Protsyuk SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. II. NGC 5662 AND V CEN Odessa Astronomical Publications |
| title | SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. II. NGC 5662 AND V CEN |
| title_full | SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. II. NGC 5662 AND V CEN |
| title_fullStr | SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. II. NGC 5662 AND V CEN |
| title_full_unstemmed | SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. II. NGC 5662 AND V CEN |
| title_short | SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. II. NGC 5662 AND V CEN |
| title_sort | spectroscopic investigations of galactic clusters with associated cepheid variables ii ngc 5662 and v cen |
| url | http://oap.onu.edu.ua/article/view/145381 |
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