| DC 欄位 |
值 |
語言 |
| DC.contributor | 天文研究所 | zh_TW |
| DC.creator | 李洋祥 | zh_TW |
| DC.creator | Yang-Shyang Li | en_US |
| dc.date.accessioned | 2003-7-14T07:39:07Z | |
| dc.date.available | 2003-7-14T07:39:07Z | |
| dc.date.issued | 2003 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=90229003 | |
| dc.contributor.department | 天文研究所 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 我們利用 Beijing-Arizona-Taipei-Connecticut (BATC) 多色巡天計畫的資料研究銀河系球狀星團 M13 (NGC 6250) 的成員星族組成。BATC的觀測由北京 60/90
公分史密特望遠鏡取得，視野大小約一平方度，其13個中頻寬濾鏡的光度資料相當於低色散光譜，涵蓋 420--970 nm 波長範圍，能有效提供恆星的分類訊息。分析 M13 星團外圍恆星的色星等圖(color-magnitude diagram) 以及個別恆星之能譜分佈 (spectral energy
distribution)，我們獲得星團的演化訊息，以及判別個別恆星是否為星團成員星。由星數密度隨空間分佈的關
係定出M13的半徑約為18角分。從資料中我們發現大質量
成員星有明顯集中於星團中心 6 角分以內的現象，這可能由於動力質量分層，或是在球狀星團核心極高密度環
境下，造成恆星演化異常的結果。 | zh_TW |
| dc.description.abstract | We used CCD photometry, in 13 intermediate bands covering from 420-970nm, on the galactic globular
cluster M13 (NGC 6205) to study its stellar population. The data---effectively low-resolution spectroscopy---were taken by the
Beijing 60/90 cm Schmidt telescope, with almost
a 1-degree field, as part of the Beijing-Arizona
-Taipei-Connecticut (BATC) multicolor sky
survey. By analysis of both the color-magnitude
diagrams and spectral energy distribution of
individual stars in the outer region of the
cluster, diagnostic information of membership
and of the evolutionary status of the cluster
has been derived. The cluster radius, as
determined by enhancement of stellar number
density, is ~ 18’’. Our data suggest a concentration of massive stars within 6’’ of
the cluster, which may be the result of
dynamical mass segregation or unusual stellar
evolution in exceedingly dense environment
at the core of a globular cluster. | en_US |
| DC.subject | 天文觀測 | zh_TW |
| DC.subject | 星團 | zh_TW |
| DC.subject | 星族組成 | zh_TW |
| DC.subject | Astronomical Observation | en_US |
| DC.subject | Star Cluster | en_US |
| DC.subject | Stellar Population | en_US |
| DC.title | 銀河系球狀星團 M13 之中頻寬 CCD 光度測量及其恆星組成 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Deep Intermediate-Band CCD Photometry of Globular cluster M13 and its StellarPopulation | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |