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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 吳柏鋒 | zh_TW |
| dc.contributor.advisor | Po-Feng Wu | en |
| dc.contributor.author | 楊坤寶 | zh_TW |
| dc.contributor.author | Kun-Bao Yang | en |
| dc.date.accessioned | 2024-08-23T16:20:40Z | - |
| dc.date.available | 2024-08-24 | - |
| dc.date.copyright | 2024-08-23 | - |
| dc.date.issued | 2024 | - |
| dc.date.submitted | 2024-08-12 | - |
| dc.identifier.citation | Albareti, F. D., Allende Prieto, C., Almeida, A., et al. 2017, The Astrophysical Journal Supplement Series, 233, 25, doi: 10.3847/1538-4365/aa8992
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K., et al. 2010, The Astronomical Journal, 140, 1868, doi: 10.1088/0004-6256/140/6/1868 Yang, X., Mo, H. J., van den Bosch, F. C., & Jing, Y. P. 2005, Monthly Notices of the Royal Astronomical Society, 356, 1293, doi: 10.1111/j.1365-2966.2005.08560.x | - |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/94993 | - |
| dc.description.abstract | 我們對幾個關鍵銀河特性（如大小、顏色、D4000、恆星形成率）在環境中的相關性進行了系統性研究，這些研究分別針對橢圓星系、透鏡星系、早期和晚期盤狀星系。我們使用來自史隆數位巡天（SDSS）的低紅移體積限制星系樣本，發現這些相關性雖然隨著哈勃序列系統地變化，但通常相對較弱。我們進一步使用由宇宙學流體力學模擬 IllustrisTNG 生成的星系樣本來檢查這些相關性，發現總體上有很好的吻合，尤其是對於中央星系。我們的結果表明，無論哪些機制負責塑造星系的形態，它們必須在高紅移時期就已經發生，以至於到紅移接近0時，環境相關性幾乎已經被沖淡。 | zh_TW |
| dc.description.abstract | We have conducted a systematic study of the dependencies on environments of several key galactic properties (such as size, color, 4000 Angstrom break strength, star formation rate) for elliptical, lenticular, early and late-type disk galaxies separately, using a low redshift volume-limited galaxy sample constructed from the Sloan Digital Sky Survey (SDSS), finding that the dependencies, albeit varying systematically with the Hubble sequence, are typically rather weak. We have further examined such dependencies using galaxies produced by the cosmological hydrodynamical simulation IllustrisTNG, finding generally good agreements, especially for central galaxies. Our results suggest that, whatever mechanisms that are responsible for shaping the morphology of galaxies must have taken place at high-$z$ such that by z~0, environmental dependencies are nearly washed out. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-08-23T16:20:39Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-08-23T16:20:40Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | Verification Letter from the Oral Examination Committee i
Acknowledgements iii 摘要 v Abstract vii Contents ix List of Figures xiii List of Tables xvii Chapter 1 Introduction 1 Chapter 2 Data 5 2.1 Observational Data Used 5 2.1.1 A Galaxy Group Catalog 5 2.1.2 The New York University Value-Added Galaxy Catalog 6 2.1.3 NASA-Sloan Atlas 6 2.1.4 Star formation rate 6 2.1.5 The MPA-JHU VAGC 7 2.1.6 Metallicities, [α/Fe] abundance ratios, and ages 7 2.1.7 Galaxy Morphology 8 2.2 Simulation Data Used 10 2.2.1 TNG100 10 2.2.2 Stellar mass and star formation rate 11 2.2.3 Metallicity and age 11 2.2.4 Effective radius 12 2.2.5 Optical Color 12 2.2.6 Morphology 13 2.3 The Galaxy Sample 14 2.3.1 The Sample in the Sloan Digital Sky Survey 14 2.3.2 The Sample in the TNG100 15 Chapter 3 Method 19 3.1 Defining Local density ρ5th 19 3.2 Binning Galaxies with Adaptive Mass Bins 21 3.3 Finding Best Fits in the Galactic Property-Density Diagrams 21 3.4 Bootstrapping to Estimate the Uncertainties of Best-Fit Values 22 3.5 Presenting the Fitting Results 23 Chapter 4 Results and discussion 33 4.1 Results from the Sloan Digital Sky Survey 33 4.1.1 Observed properties 33 4.1.2 Star Formation History-Related Properties 37 4.2 Results in the IllustrisTNG-100 37 4.2.1 Observed properties 44 4.2.2 SFH-related Properties 45 Chapter 5 Conclusion and Prospects 53 References 55 Appendix A — Fitting Line Figures: SDSS 61 Appendix B — Fitting Line Figures: TNG100 69 | - |
| dc.language.iso | en | - |
| dc.subject | 宇宙學流體力學模擬 | zh_TW |
| dc.subject | 環境密度 | zh_TW |
| dc.subject | 史隆數位化巡天 | zh_TW |
| dc.subject | 星系演化 | zh_TW |
| dc.subject | 哈伯序列 | zh_TW |
| dc.subject | Galaxy Evolution | en |
| dc.subject | Hubble Sequence | en |
| dc.subject | Local Density | en |
| dc.subject | SDSS | en |
| dc.subject | IllustrisTNG | en |
| dc.title | 鄰近宇宙中哈伯序列星系性質與周邊環境密度相關性之系統性研究 | zh_TW |
| dc.title | A Systematic Investigation of Environmental Dependencies of Galactic Properties Across the Hubble Sequence in the Local Universe | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 112-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.coadvisor | 林彥廷 | zh_TW |
| dc.contributor.coadvisor | Yen-Ting Lin | en |
| dc.contributor.oralexamcommittee | 林俐暉;陳建州 | zh_TW |
| dc.contributor.oralexamcommittee | Li-Hwai Lin;Chian-Chou Chen | en |
| dc.subject.keyword | 星系演化,哈伯序列,環境密度,史隆數位化巡天,宇宙學流體力學模擬, | zh_TW |
| dc.subject.keyword | Galaxy Evolution,Hubble Sequence,Local Density,SDSS,IllustrisTNG, | en |
| dc.relation.page | 73 | - |
| dc.identifier.doi | 10.6342/NTU202402068 | - |
| dc.rights.note | 同意授權(限校園內公開) | - |
| dc.date.accepted | 2024-08-14 | - |
| dc.contributor.author-college | 理學院 | - |
| dc.contributor.author-dept | 物理學系 | - |
| dc.date.embargo-lift | 2025-08-01 | - |
| 顯示於系所單位： | 物理學系 | |
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