 |
|
|
|
以作者查詢圖書館館藏 、以作者查詢臺灣博碩士 、以作者查詢全國書目 、勘誤回報 、線上人數：119 、訪客IP：3.137.174.216
姓名 陳怡頻(Yi-Ping Chen) 查詢紙本館藏 畢業系所 物理學系 論文名稱 利用二微米巡天觀測(2MASS)資料以恆星計數方法分析銀盤結構
(The Galactic disk structure by 2MASS star counts)相關論文 檔案 [Endnote RIS 格式]
[相關文章]
[文章引用]
[完整記錄]
[館藏目錄]
[檢視]
- 本電子論文使用權限為同意立即開放。
- 已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。
- 請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。
摘要(中) 摘要
我們利用恆星計數的方式，分析二微米巡天觀測(2MASS) 資料，以得知我們銀河盤面的結構。分析銀盤結構的模型主要由兩的參數所構成 — 一個為薄盤另一個為厚盤，這兩種盤上的恆星分佈，以銀河中心為點，在徑向和垂直方向上,都呈現指數衰減的情況。因此我們企圖利用2MASS 資料，並把它分成K = 5–9 mag (主要為巨星組成的薄盤) 和 K = 11–14 mag (主要為矮星組成的薄盤)兩個光度範圍。並朝l = 180° (亦即反銀心方) 的方向去挑選星場，且計算從銀盤面到南北兩極的每個星場密度。假使厚盤密度的只有薄盤的百分之二，那我們的資料對於估計厚盤參數並不敏感。在K = 5–9 mag (巨星) 的亮星星場，因為星數太少，所以無法估計由巨星組成的薄盤，至於由矮星 (K = 11–14 mag)所組成的薄盤，在銀盤之北及之南的分布相當，且厚度135 ± 80 pc，徑向尺度為700 ± 500 pc。摘要(英) Abstract
We apply star counting technique on the Two Micron All Sky Survey (2MASS) point-source catalog in an attempt to diagnose the disk structure of the Milky Way Galaxy. The analytical disk model includes two stellar components, a thin and a thick disk, both with doubly exponential distributions in radial and height directions. We present how the projected stellar densities for 2MASS sources from K = 5 to 9 mag (dominated by thin disk giants) and from K = 11 to 14 mag (dominated by thin disk dwarfs), vary from the Galactic Equator to the North Galactic Pole and to the South Galactic pole in Galactic longitude l = 180 degrees. Assuming a nominal 2% contribution from the thick disk relative to the thin disk, our data are not sensitive to the thick disk. Because of the low surface density in the K = 5 to 9 mag sample, we counted not set a firm constraint to the distribution of the thin disk giants. For thin disk dwarfs, our analysis yields a scale height of 135 ± 80 pc and with a radial scale length of 700 ± 500 pc.關鍵字(中) ★ 恆星計數
★ 薄盤
★ 厚盤
★ 二微巡天觀測(2MASS)
★ 銀盤關鍵字(英) ★ star counts
★ thick disk
★ Galactic disk
★ 2MASS
★ thin disk論文目次 Contents
List of Figures Ⅴ
List of Tables Ⅵ
1 Introduction 1
1.1 The Galactic Model …………………………………………………………2
1.2 Motivation of Our Study ………………………………………………….4
2 Star Counts Data 5
2.1 The 2MASS Data Base …………………………………………………..5
2.2 Selection of Random Fields ………………………………………………5
2.2.1 Two-Point Correlation Function ……………………………………6
2.2.2 Two-Point Correlation Function on Multiple Angular Scales ……….7
2.3 Adopted 2MASS Star Fields ……………………………………………….9
2.4 The Final 2MASS Field Selected in This Study …………………………14
3 Comparison with The Data 17
4 Conclusions 23
References 24
Appendix A1 Two-point correlation function on multiple angular scales of
uniform random field 25
Appendix A2 The uniform random fields for l =180 deg, b = 2 to 88 deg 58
Appendix A3 The uniform random fields for l =180 deg, b = - 2 to - 88 deg 62參考文獻 Bahcall, J., N., & Soneira, R., M., 1980, APJS, 44, 73
Bahcall, J., N., & Soneira, R., M., 1984, APJS, 55, 67
Bing-Chih; C., Phillip, K.; L., René, A.; M., & William, F., V., 2003, AJ,
126, 762
Carroll, B., W., & Ostlie, D., A., An introduction to Modern Astrophysics, Mass
Addison-Wesley Pub c1996, p.917
Faber, S., M.; Burstein, D.; Tinsley, B.; & King, I., R., 1976, AJ, v.81, p.45
Fenkart, R., P., Topakta¸ S., L., Boydag, S., & Kandemir, G., 1987, A&AS, 67,
24
Gomez, M., Hartmann, L., Kenyon, S., J., & Hewett, R., 1993, AJ, 105, 1927
Gilmore, G., & Reid, N., 1983, MNRAS, 202 1025
Gilmore, G., 1984, MNRAS, 207, 223
Gilmore, G., 1986
Gilmore, G. & Carswel, B., The Galaxy, Dordrecht D. Reidel Pub. Co c1987,
p.247-279
Jarrett, Thomas, IPAC, September, 1992
http://spider.ipac.caltech.edu/staff/jarrett/num_mod/num_mod.html
Kuijken, K., & Gilmore, G., 1989, MNRAS, 239, 605
Mendez, R., A., van Altena, W., F., 1996, AJ, v.112, p.655
Ojha, D., K., 2001, MNRAS, 322, 426
Porcel, C., Garzón, F., Jiménez, V., J., & Battaner, E., 1998, A&A, 330, 136
Reid, I., N., & Majewski, S., R., 1993, ApJ, 409, 63
Robin, A., & Crézé, M., 1986, A&A, 157, 71
Robin, A., C., Haywood, M., Crézé, M., Ojha, D., K., & Bienaymé, O., 1996, A&A,
305, 125
Tritton, K., P., & Morton, D., C., 1984, MNRAS, 209, 429
Tinney, C., G., 1993, ApJ, 414, 279
Yoshii, Y., 1982, PASJ, 34, 265
Yoshii, Y., Ishida, K., & Stobie R., S., 1987, AJ, 93, 323指導教授 陳文屏(Wen-Ping Chen) 審核日期 2005-7-20 推文 plurk
funp
live
udn
HD
myshare
netvibes
friend
youpush
delicious
baidu
網路書籤 Google bookmarks
del.icio.us
hemidemi
facebook
twitter
google
reddit