SUPERNOVA SEARCH IN EARLY TYPE GALAXIES

早期星系中的超新星搜索

• 批准号: 11640229
• 负责人: SHIGEYAMA Toshikazu
• 金额: $ 2.18万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640229/
• 关键词: early type galaxies; supernovae; public observatory; photometry; 天体検出

We have constructed a project with 7 public astronomical observatories located in Japan to search supernovae in early type galaxies by monitoring 〜30 fields each of which contains a cluster of galaxies. The apertures of telescopes used in this project range from 60 cm to 1 m. Unfortunately, no supernova has been found. Instead, a star with a large proper motion was found.We have developed a computer program to automatically detect newly emerging celestial objects. One of us (Doi, M.) utilized this program when he performed an observation for distant supernova survey with SUBARU. This survey found 〜30 candidate objects. The spectra for 7 of this candidates were taken with FOCAS and it was found that they are actually type la supemovae.As for theoretical attempts, we have proposed a model to explain the existence of hot gas surrounding M87 in which the conductive heat flux from the hotter intra-cluster matter of the Virgo cluster prevent the gas from being cooled by intense radiation. We have also developed a model for star formation history of galaxies assuming most of stars were formed from the matter swept up by supernovae. This model reproduces star formation histories of the Galactic halo and some local dwarf spheroidal galaxies.

我们在日本建立了一个由 7 个公共天文台组成的项目，通过监测〜30 个区域（每个区域包含一个星系团）来搜索早期星系中的超新星。该项目使用的望远镜口径范围为60 cm至1 m。不幸的是，尚未发现超新星。相反，发现了一颗具有较大自行运动的恒星。我们开发了一种计算机程序来自动检测新出现的天体。我们中的一位（Doi, M.）在与 SUBARU 一起进行遥远超新星巡天观测时使用了该程序。本次调查发现〜30个候选对象。其中7个候选者的光谱是用FOCAS拍摄的，结果发现它们实际上是la superovae类型。 至于理论尝试，我们提出了一个模型来解释M87周围热气体的存在，其中来自处女座星团较热的星团内物质的传导热通量阻止了气体被强烈辐射冷却。我们还开发了一个星系恒星形成历史的模型，假设大多数恒星是由超新星扫过的物质形成的。该模型再现了银河晕和一些局部矮椭球星系的恒星形成历史。

项目成果

辻本 拓司: "CHEMICAL EVOLUTION OF THE GALACTIC HALO THROUGH SUPERNOVA-INDUCED STAR FORMATION AND ITS IMPLICATION FOR POPULATION III STARS"The Astrophysical Journal. 519. L63-L67 (1999)

Takuji Tsujimoto：“超新星引发的恒星形成中银河晕的化学演化及其对 III 族恒星的影响”《天体物理学杂志》519。L63-L67 (1999)。

MAZZALI, P. A. ET AL.: "THE TYPE Ic HYPERNOVA SN 2002ap"THE ASTROPHYSICAL JOUNRAL. 572. L61-L65 (2002)

MAZZALI, P. A. 等人：“IC 型超新星 SN 2002ap”天体物理学杂志。

辻本拓司: "History of Milky Way Dwarf Spheroidal Galaxies Imprinted on Abundance Patterns of Neutron-Capture Elements"The Astrophysical Journal. 571巻2号. L93-L97 (2002)

Takuji Tsujimoto：“中子捕获元素丰度模式印记的银河系矮球状星系的历史”《天体物理学杂志》第 571 卷，第 2 期。L93-L97 (2002)

X.Fan: "The Discovery of a Luminous Z=5.80 Quasar from the Sloan Digital Sky"The Astronomical Journal. 120. 1167-1174 (2000)

X.Fan：“从斯隆数字天空发现一个发光的 Z=5.80 类星体”《天文学杂志》。

茂山俊和: "Excavation of the First Stars"The Astrophysical Journal. 584. L57-L60 (2003)

Toshikazu Shigeyama：“第一批恒星的挖掘”天体物理学杂志 584. L57-L60 (2003)。