【直播】【中国科学院国家天文台】Nicola R. Napolitano 学术报告

KouShare 蔻享学术 2022-07-20

直播信息

报告题目

The kinematics of globular clusters and planetary nebula in the core of the Fornax Cluster: intracluster light and the search of stellar streams

报告人

Nicola R. Napolitano

报告时间

2022年6月29日（周三）15:30

主办方

中国科学院国家天文台

直播二维码

报告人介绍

Dr. Nicola Napolitano obtained his PhD at the University of Naples in 2001, supervised by Prof. Magda Arnaboldi. From 2002 to 2003, he was a postdoc at INAF – the Astronomical Observatory of Capodimonte; from 2003 to 2004, he was a Marie Curie Fellow at Kapteyn Institute, Groningen, the Netherland. Since 2005, he became a Permanent Research Astronomer at INAF. In 2018, he was awarded the One Hundred Top Talents (Bairen) Professor at the Sun-Yat Sen University. Dr. Napolitano’s research interests include dark matter, galaxy formation and evolution, dynamics of early-type galaxies, N-body simulations, and machine learning techniques applied to astronomy. He has extensive collaborations with a number of large programs in astronomy, including the Chinese Space Station Telescope (CSST), in the science area of Galaxies, AGN and Strong Lensing. He is the PI of the Fornax VLT Spectroscopic Survey (FVSS), which he will introduce in the lecture today.

报告摘要

I will present recent results of the kinematics of planetary nebulae (PNe) and globular clusters (GCs) out to about 200 kpc from the center of the Fornax cluster. We have collected more than 2000 new radial velocities using VIMOS and FORS2 spectrographs on ESO’s 8.2m Very Large Telescope (VLT) which, combined with previous literature, make one of the largest data samples covering a volume of a galaxy cluster up to about 1/4 of its viral radius. I will show the signature of an intracluster stellar population both on the velocity field of PNe and GCs and report the discovery of 13 candidate stellar streams in the Fornax core. We show evidence for a variety of cold substructures predicted in simulations. Most of the streams are kinematically connected to UCDs, supporting the scenario that they can be remnants of disrupted dwarf systems. However, we also show the presence of long coherent substructures connecting cluster members and isolated clumps of tracers possibly left behind by their parent systems before these merged into the central galaxy.

扩展阅读

1.【上海天文台天体物理学术报告】加州理工学院菲利普·霍普金斯

2.【中国科寰宇开物天文台季索讲清坛】上海天文台季索清坛：微物理和非热过程...

3.【中国科大寰宇开物天文讲坛】上海天文台高级工程师宋叶志：天基光学与雷达空间目标精密定轨

4.【科大寰宇宇的天文天文坛高能所催展的预告】中的科大明星介绍：“全变追踪源中国”