Construction of dark energy model based on vector-tensor theories
| Project/Area Number |
17K14297
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | Tokyo University of Science |
|---|
Principal Investigator |
KASE Ryotaro 東京理科大学, 理学部第二部物理学科, 講師 (10756406)
|
|---|
| Project Period (FY) |
2017-04-01 – 2021-03-31
|
| Project Status |
Completed (Fiscal Year 2020)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
|---|
| Keywords | 暗黒エネルギー / 修正重力理論 / ブラックホール / 中性子星 / インフレーション / 拡張重力理論 / 宇宙論 / 重力理論 / ブラックホール摂動論 / 宇宙物理 |
|---|
| Outline of Final Research Achievements |
In this research project, we focused on the construction of dark energy model based on vector-tensor theories in which a vector field and a gravitational field (tensor field) are directly coupled. We focused not only on the large scale associated with cosmology but also on small scale local objects such as black holes and neutron stars, which are closely related to gravitational wave observations showing the remarkable development in recent years. As a result, in the research period is from April 2017 to March 2021, a total of 26 original papers and 1 review paper have been published. In addition, for the purpose of disseminating these results, we gave four invited talk at international conferences, three research presentations at academic conferences, and hosted two research meetings.
|
| Academic Significance and Societal Importance of the Research Achievements |
宇宙の加速膨張という未知の現象の発見から約20年が経過したが，この源である暗黒エネルギーに関して現存する全ての観測データと整合性のある理論模型は依然見つかっていない．修正重力理論に基づく暗黒エネルギー模型に関しては，これまでスカラー場を導入した理論が多くの研究されてきたが，本研究ではベクトル場を導入した理論に着目して研究を行い，ベクトル場が宇宙論的なダイナミクスやブラックホール，中性子星に与える固有の影響を包括的に明らかにした．これらの研究成果は将来の高精度な観測結果を用いた両理論の観測的区別を可能にしており，今世紀の物理学最大の課題の一つである暗黒エネルギーの起源解明に一歩近づいたと言える．
|
Report
(5 results)
Research Products
(46 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Journal Article] Anisotropic 2-form dark energy2019
Author(s)
Juan P.Beltran Almeida, Alejandro Guarnizo, Ryotaro Kase, Shinji Tsujikawa, Cesar A. Valenzuela-Toledo
-
Journal Title
Physics Letters B
Volume: 793
Pages: 396-404
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Journal Article] Black holes in vector-tensor theories2017
Author(s)
Lavinia Heisenberg, Ryotaro Kase, Masato Minamitsuji, Shinji Tsujikawa
-
Journal Title
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume: 1708, 24
Issue: 08
Pages: 1-38
DOI
Related Report
Peer Reviewed / Int'l Joint Research
-
-
-
-
-
-
-
-
-
-
-
-
-
