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Welcome to the homepage of Dr. Xu, Renxin


Chinese Version ÖÐÎÄ°æ (Chinese Version)

   

Personal Statements

Research Interests: Particle astrophysics (e.g., for pulsars, see below)

  1. I am interested in the physics in extraterrestrial extreme-environments. Pulsar is one of the excellent examples with such extremeness, which can be mainly classified into:
    • Rotation-powered pulsars
    • Accretion-powered pulsars
      • Accretion-powered X-ray pulsars
      • X-ray bursters
    • Magnetism-powered (?) pulsars (Magnetars?)
      • Soft gamma ray repeaters
      • Anomalous X-ray pulsars

    Let's listen to the Vela pulsar (the sound of Vela) in radio band ...

  2. We currently believe, according to various observations, that pulsars are celestial bodies which are distinguished by their compactness (about 1.4 solar mass, but only about 10 km radius). What's the nature of pulsars? Two models are tried to answer this question:
    • The neutron star model
    • The quark star model
  3. Neutron stars and quark stars are composed of neutron (hadron) matter and quark matter, respectively. One kind of quark stars, which is popularly discussed in literatures, is strange quark star (i.e., quark star with strangeness). Can we find hard observational evidence to rule out that pulsars are neutron stars or strange stars? This is certainly one of the key projects of astrophysics in the coming years.

Publications

Here are some selected papers. A complete set will be available in the future.

  1. Publications for scientific popularization (in Chinese, .pdf or .ps files)
  2. Published in Periodic Journals
  3. Conference Proceedings

Conferences which you may be interested in:

Compact stars in the QCD phase diagram (2009.5.20-24)

CCAST Workshop on dense matter and neutron stars (2003.10.20-24)

Teaching

The schedule of the Astrophysics course (one semester)

The schedule of the Atomic-physics course (one semester)

Hotlinks

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