◆ 事業所情報 ◆ 業務案内 ◆ 業務事例 ◆ リンク ◆ お問い合わせ
Location : TOP → 事業所情報 →  代表者経歴(主たる論文) → Kinematics of Classical Cepheids in the Nuclear Stellar Disk
事業所概要 代表者経歴(論文) 代表者経歴(特許)


Kinematics of Classical Cepheids in the Nuclear Stellar Disk

Matsunaga, Noriyuki; Fukue, Kei; Yamamoto, Ryo; Matsui, Takuya; Kobayashi, Naoto; Inno Laura; Genovali, Katia; Bono, Giuseppe; Baba, Junichi; Fujii, Michiko, S; Kondo, Sohei; Ikeda, Yuji; Hamano, Satoshi; Nishiyama, Shogo; Nagata, Tetsuya; Aoki, Wako; Tsujimoto, Takuji
2015, ApJ
■ アブストラクト
Classical Cepheids are useful tracers of the Galactic young stellar population because their distances and ages can be determined from their period-luminosity and period-age relations. In addition, the radial velocities and chemical abundance of the Cepheids can be derived from spectroscopic observations, providing further insights into the structure and evolution of the Galaxy. Here, we report the radial velocities of classical Cepheids near the Galactic center, three of which were reported in 2011 and a fourth being reported for the first time. The velocities of these Cepheids suggest that the stars orbit within the nuclear stellar disk, a group of stars and interstellar matter occupying a region of ~200 pc around the center, although the three-dimensional velocities cannot be determined until the proper motions are known. According to our simulation, these four Cepheids formed within the nuclear stellar disk like younger stars and stellar clusters therein.