SHAO Astrophysics Colloquia

Title: A short introduction to gravitational wave and gravitational wave astrophysics

Speaker: Prof. Youjun Lu (NAOC)

Time: 3 PM, Dec. 01 (Thursday)

Location: Lecture Hall, 3rd floor

Abstract: Gravitational wave, ripples in the fabric of spacetime, is a major prediction of Einstein's General Relativity (GR) and is one of the most profound nature of gravity. LIGO team recently announced the first direct detection of gravitational wave, emitted from a binary black hole merger, which not only confirms the prediction of GR but also opens an unprecedented new window ontothe cosmos--a window of gravitational wave astronomy. In this Lecture, I will give a short introduction to gravitational wave and those methods to detect gravitational waves. I will also briefly overview the field of gravitational wave astrophysics and talk about the prospects of this field.

Seminar talk

Galactic Dynamics Group Journal Club

Location：1608

Time：9:30-11:00，Dec. 01(Thursday)

Speaker: Iulia Simion

Title: The Age and Structure of the Galactic Bulge from Mira Variables

Abstract:

Catchpole et al. 2016 study the Milky Way Bulge structure as a function of age using a sample of ~8700 Mira Variables from the OGLE and Macho surveys combined with independent observations. Distances to these stars are derived from a period-luminosity relation together with corrections for interstellar and circumstellar extinction. It is shown that both in the inner and outer regions of the Bulge the longer period Miras, tracers of an intermediate age population (~5 Gyrs and younger), give evidence of a tilted bar-like structure. They also show a clumpy structure possibly part of an X-structure.  The distribution of the shorter period (metal-rich globular cluster age) Miras, appears spheroidal in the outer bulge.

Group meetings

Black hole Accretion and High-energy Astrophysics /Black Hole Feedback and Cosmic Ray Astrophysics Seminar

Location：1608

Time：9:00-11:00，Dec. 2( Friday)

Speaker: Can Cui

Title: The collimation of magnetic jets by disc winds

http://adsabs.harvard.edu/abs/2016MNRAS.461.2605G 

Speaker: Weixiao Wang

Title: Photon-conserving Comptonization in simulations of accretion discs around black holes

http://adsabs.harvard.edu/abs/2015MNRAS.454.2372S

Galaxy Seminar

Location: 1714 Contact: Jian Fu, Fangting Yuan, Chunyan Jiang, Zhaoyu Li, Ting Xiao

Time: 10:30，Nov. 30( Wednesday)

Title: Simulatious on Jet/Bubble Morphology: Reference on Jet Dynamic/ICM weather

Speaker: Chaoming Gan