Formation and evolution of giant molecular clouds in a barred spiral galaxy

The cover of this title could differ from library to library.

Available in National Diet Library

Find on the publisher's website

国立国会図書館デジタルコレクション

Digital data available

Check on the publisher's website

DOI[10.14943/doctoral.k12238]to the data of the same series

Formation and evolution of giant molecular clouds in a barred spiral galaxy

Persistent ID (NDL): info:ndljp/pid/9984752

Material type: 博士論文

Author: 藤本, 裕輔

Publisher: Hokkaido University

Publication date: 2016-03-24

Material Format: Digital

Capacity, size, etc.: -

Name of awarding university/degree: 北海道大学,博士(理学)

View All

Notes on use at the National Diet Library

本資料は、掲載誌(URI)等のリンク先にある学位授与機関のWebサイトやCiNii Dissertationsから、本文を自由に閲覧できる場合があります。

Notes on use

Note (General)：: Understanding where and how gas is converted into stars in a galaxy is important for under-standing a galaxy's formation and evolution through each ep...

Search by Bookstore

Read this material in an accessible format.

View materials in accessible formats for people with print disabilities (1Type)

Holdings of Libraries in Japan

This page shows libraries in Japan other than the National Diet Library that hold the material.

List of Cooperating Institutions and Databases

Please contact your local library for information on how to use materials or whether it is possible to request materials from the holding libraries.

other

Hokkaido University Collection of Scholarly and Academic Papers
Digital
You can check the holdings of institutions and databases with which 学術機関リポジトリデータベース（IRDB）（機関リポジトリ） is linked at the site of 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）.
Hokkaido University Collection of Scholarly and Academic Papers

Search by Bookstore

Read in Disability Resources

Other Services
- テキストデータ check it on 国立国会図書館デジタルコレクション

Bibliographic Record

You can check the details of this material, its authority (keywords that refer to materials on the same subject, author's name, etc.), etc.

Digital

Material Type: 博士論文
Title: Formation and evolution of giant molecular clouds in a barred spiral galaxy
Author/Editor: 藤本, 裕輔
Author Heading: 藤本, 裕輔
Publication, Distribution, etc.: Hokkaido University
Publication Date: 2016-03-24
Publication Date (W3CDTF): 2016-03-24
Alternative Title: 棒渦巻銀河における巨大分子雲の形成と進化
Contributor: 羽部, 朝男
小笹, 隆司
倉本, 圭
小林, 達夫
Tasker, Elizabeth
岡本, 崇
Degree grantor/type: 北海道大学
Date Granted: 2016-03-24
Date Granted (W3CDTF): 2016-03-24
Dissertation Number: 甲第12238号
Degree Type: 博士(理学)
Conferring No. (Dissertation): 甲第12238号
Text Language Code: eng
NDC: 400
Target Audience: 一般
Note (General): Understanding where and how gas is converted into stars in a galaxy is important for under-standing a galaxy's formation and evolution through each epoch of the universe. Which physicalprocesses control the star formation in a galaxy is heavily debated.We are now at a stage where it is possible to investigate the giant molecular clouds (GMC)and star formation, while also taking global galactic dynamics into account. Thanks to highresolution and sensitive observations from sources such as the millimeter/submillimeter obser-vations by ALMA and infrared observations by Spitzer and Herschel, it is becoming possible tostatistically explore GMC and star forming regions through observations in nearby galaxies. Intheoretical works, we can also now investigate the formation and evolution of individual GMCsusing hydrodynamical isolated galaxy simulations with a self-consistent multiphase interstellarmedium (ISM) thanks to developments of super-computer and effective algorithms.Recent observations (high resolution, but not enough to resolve down to GMC scale yet)have shown the star formation activity changing between galactic-scale environments. The starformation efficiencies (SFEs) have systematic variations larger than one order of magnitudebetween different galaxy types and between different regions within a galaxy. This means thatthe gas density is not the only factor that determines the star formation activity in a galaxy.In particular, observations of barred galaxies showed that a central bar region has a lower SFEthan that in the spiral arm regions even when the gas surface densities are almost the same.Why does the star formation activity differ depending on the galactic structure's differentenvironments? This question is key to understanding the galactic-scale star formation and hasbeen the focus of my doctoral research. To understand this, it is important to investigate howthe formation and evolution of GMCs is affected by the galactic structures. This is becausethe GMCs are the star formation spots in a galaxy; they are formed from the cold phase of theISM, and their densest pockets are the birth place of stars.We performed three-dimensional hydrodynamical simulations of a barred spiral galaxy. Weclari ed that galactic environments and stellar feedbacks affect GMC formation and evolution,and that could explain the different star formation activities in a barred spiral galaxy. Theseworks consists of three parts. They are summarised below.
(主査) 教授羽部朝男, 教授小笹隆司, 教授倉本圭, 教授小林達夫, 助教 Elizabeth Tasker, 助教岡本崇
理学院（宇宙理学専攻）
DOI: 10.14943/doctoral.k12238
https://doi.org/10.14943/doctoral.k12238
Persistent ID (NDL): info:ndljp/pid/9984752
https://dl.ndl.go.jp/pid/9984752
Collection: 障害者向け資料
Collection (Materials For Handicapped People:1): テキストデータ
Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
https://dl.ndl.go.jp/collections/A00014
Acquisition Basis: 博士論文（自動収集）
Date Accepted (W3CDTF): 2016-06-03T01:05:16+09:00
Date Created (W3CDTF): 2016-03
Format (IMT): PDF
Access Restrictions: 国立国会図書館内限定公開
Service for the Digitized Contents Transmission Service: 図書館・個人送信対象外
Availability of remote photoduplication service: 可
Periodical Title (URI): http://dx.doi.org/10.14943/doctoral.k12238
http://hdl.handle.net/2115/61705
Is Referenced By (URI): http://hdl.handle.net/2115/61706
Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション
https://dl.ndl.go.jp