uvby-H-beta CCD photometry and membership segregation of the open cluster NGC 2682 (M 67)
文献类型：期刊论文
| 作者 | Balaguer-Nunez, L.; Galadi-Enriquez, D.; Jordi, C. |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2007-08-01 |
| 卷号 | 470期号:2页码:585-U43 |
| 关键词 | galaxy : open clusters and associations : individual : NGC 2682 techniques : photometric astrometry methods : observational methods : data analysis |
| 英文摘要 | Following deep astrometric and photometric study of the cluster NGC 2682 (M 67), we are able to accurately determine its fundamental parameters. Being an old and rich cluster, M 67 is relevant for the analysis of the Galactic disk evolution. M 67 is well studied but lacks a wide and deep Stromgren photometric study. The brightest stars of the open cluster M 67 were used as uvby -H-beta standard stars in our studies of NGC 1817 and NGC 2548, and the extension of the field covered, as well as the number of observations, allowed us to obtain the best set of Stromgren data ever published for this cluster. We discuss the results of our CCD uvby-H-beta intermediate-band photometry, covering an area of about 50' x 50' down to V similar to 19. Moreover, a complete membership segregation based on astrometric and photometric criteria is obtained. The photometric analysis of a selected sample of stars yields a reddening value of E(b -y) = 0.03 +/- 0.03, a distance modulus of V-0-MV = 9.7 +/- 0.2 and [Fe/H] = 0.01 +/- 0.14. Through isochrone fitting we found an age of log t = 9.6 +/- 0.1 (4.2 +/- 0.2 Gyr). A clump of approximately 60 stars around V = 16, (b-y) = 0.4 could be interpreted as a population of pre-cataclysmic variable stars (if members), or as a stream of field G-type stars placed at twice the distance of the cluster (if non-members). |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STELLAR EVOLUTION DATABASE ; COLOR-MAGNITUDE DIAGRAM ; BLUE-STRAGGLERS ; PROPER MOTIONS ; EMPIRICAL CALIBRATIONS ; POPULATION SYNTHESIS ; MAIN-SEQUENCE ; M67 ; STARS ; SYSTEMS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000247981000021 |
| 源URL | [http://119.78.226.72/handle/331011/19503]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Astron Inst, Cambridge CB3 0HA, England 4.CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain 5.IEEC, Barcelona 08034, Spain |
| 推荐引用方式 GB/T 7714 | Balaguer-Nunez, L.,Galadi-Enriquez, D.,Jordi, C.. uvby-H-beta CCD photometry and membership segregation of the open cluster NGC 2682 (M 67)[J]. ASTRONOMY & ASTROPHYSICS,2007,470(2):585-U43. |
| APA | Balaguer-Nunez, L.,Galadi-Enriquez, D.,&Jordi, C..(2007).uvby-H-beta CCD photometry and membership segregation of the open cluster NGC 2682 (M 67).ASTRONOMY & ASTROPHYSICS,470(2),585-U43. |
| MLA | Balaguer-Nunez, L.,et al."uvby-H-beta CCD photometry and membership segregation of the open cluster NGC 2682 (M 67)".ASTRONOMY & ASTROPHYSICS 470.2(2007):585-U43. |
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来源：上海天文台
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