Education and Employment

Education: BS Physics, Zhengzhou University, 1989

MS Astrophysics, Yunnan Observatory, Chinese Academy of Science, 1992

PhD Astrophysics, International School for Advanced Studies (SISSA/ISAS, Trieste, Italy), 2000

Employment:

Yunnan Observatory, Chinese Academy of Science (CAS) , Assistant Professor (1992-1996.10)

Center for Astrophysics, Tsinghua University, Visiting Scholar (2002.12-2003.5)

Dept. of Phys., Tsinghua University, Associate Professor (2003.5-)

Visiting Scholar, International School for Advanced Studies, Trieste, Italy (2000.11-2000.12)

Visiting Scholar, Osservatorio Astronomico di Brera, Milan, Italy（2001.1-3）

Post Doctor, Insubria University, Como/Milan, Italy (2001.4-2002.11）

Teaching

Undergraduate Course“Introduction to Astronomy”(2003-2008 Autumn, 2007-2008 Spring)

Interests

Research is in the multi-disciplinary area of Astrophysics. Special attention is paid to the optical observations and high energy data analysis of various astronomical sources, and relevant theory.

1.Optical Observations

a. Active Galactic Nuclei (AGNs), in particular blazars

b. Simultaneous observations of the selected variable sources

c. Supernovae

d. Optical afterglow of Gamma-ray Bursts (GRBs)

2.High Energy Astrophysics

a. X-ray data analysis

b. Radiation mechanisms of AGNs

c. Micro-quasars and quasars

Awards and Membership

Awards 1.“Miti-wavelength Observations and Theory Studies of AGNs” (Guang-Zhong Xie, Kai-Hua Li, Jun-Hui Fan, Fu-Kun Liu, You-Hong Zhang et al.), CAS Natural Science Award, Second Class, China (1999)

Selected Publications

Author or co-author of about 40 papers. The total citation number is about 300. Selected SCI Papers:

1. Zhang, Y. H. 2008, ApJ, 682, 789-797

XMM-Newton Observations of the TeV BL Lacertae Object PKS 2155-304 in 2006: Signature of Inverse Compton X-Ray Emission

2. Zhang, Y. H., Bai, J. M., Zhang, S. N., Treves, A., Maraschi, L., Celotti, A. 2006, ApJ, 651, 782-790

Multi-wavelength Observations of the BL Lacertae Object PKS 2155-304 with XMM-Newton

3. Zhang, Y. H.; Treves, A.; Maraschi, L.; Bai, J. M.; Liu, F. K. 2006, ApJ, 699-710

XMM-Newton View of PKS 2155-304: Hardness Ratio and Cross-Correlation Analysis of EPIC pn Observations

4. Zhang, Y.H., Treves, A., Celotti, A., Qin, Y.P., Bai, J.M. 2005, ApJ, 629, 686-699

XMM-Newton view of PKS2155-304: characterizing the X-ray variability properties with EPIC pn

5. Zhang, Y.H. 2005, ChJAA, Vol.5 Supplement, 201-206 Phenomenological analogies in TeV blazars and black hole X-ray binaries in low state

6. Zhang, Y. H., Cagnoni, I., Treves, A., Celotti, A.，Maraschi, L. 2004, ApJ, 605, 98-104

The effects of periodically gapped time series on cross-correlation lag determinations

7. Zhang, Y. H. 2002, MNRAS, 337, 609-618

Cross-spectral analysis of the X-ray variability of Markarian 421

8. Zhang, Y. H., Treves, A., Celotti, A., Chiappetti, L., Fossati, G., Ghisellini, G., Maraschi, L., Pian, E., Tagliaferri, G., Tavecchio, F. 2002, ApJ, 572, 762-785

Four Years of Monitoring Blazar PKS 2155-304 with BeppoSAX: Probing the Dynamics of the Jet

9. Liu, F.K., Zhang, Y.H. A&A, 2002, 381, 757-760

A new list of extra-galactic radio jets

10. Fossati, G., Celotti, A., Chiaberge, M., Zhang, Y. H., Chiappetti, L., Ghisellini, G., Maraschi, L., Tavecchio, F., Pian, E., Treves, A. 2000, ApJ, 541, 166-179

X-ray emission of Markarian 421: new clues from its spectral evolution. II. Spectral analysis and physical constraints

11. Fossati, G., Celotti, A., Chiaberge, M., Zhang, Y. H., Chiappetti, L., Ghisellini, G., Maraschi, L., Tavecchio, F., Pian, E., Treves, A. 2000, ApJ, 541, 153-165

X-ray emission of Markarian 421: new clues from its spectral evolution. I. Temporal analysis

12. Xue, S.J., Zhang, Y. H., Chen, J.S. 2000, ApJ, 538, 121-126

ROSAT/ASCA observations of a serendipitous BL Lac Object PKS 2316-423: the variable high-energy tail of synchrotron radiation

13. Zhang, Y.H., Celotti, A., Treves, A., Chiappetti, L., Ghisellini, G., Maraschi, L., Pian, E., Tagliaferri., G., Tavecchio, F., Urry, C.M. 1999, ApJ, 527, 719-732

Rapid X-ray variability of the BL Lacertae object PKS 2155-304

14. Chiappetti, L., Maraschi, L., Tavecchio, F., Celotti, A., Fossati, G., Ghisellini, G., Giommi, P., Pian, E., Tagliaferri, G., Treves, A., Urry, C. M., Zhang, Y. H. 1999, ApJ, 521, 552-560

Spectral evolution of PKS 2155-304 observed with BeppoSAX during an active gamma-ray phase

15. Xie, G., Zhang, Y.H., Fan, J.H. ApJ, 1997, 477, 114-117

The relation between gamma-Ray and near-infrared radiation in gamma-ray--loud blazars

16. Zhang, Y.H., Xie, G.Z. A&A, 1997, 317, 393-396

Correlation between gamma-ray and far-infrared luminosity for EGRET-detected sources

17. Zhang, Y.H., Xie, G. Z. 1996, A&AS, 119, 199-203

Infrared properties of OJ 287

18. Zhang, Y.H., Xie, G. Z. 1996, A&AS, 116, 289-293

CCD photometry and long-term optical variability of PKS 2155-304

19. Xie, G. Z., Zhang, Y. H., Li, K. H., Liu, F. K., Wang, J. C., Wang, X. M 1996, AJ, 111, 1065-1072

CCD photometry of 12 BL Lacertae Objects

20. Zhang, Y.H., Xie, G.Z., Cao, S.L., Li, K.H., Wang, J.C., Ye, B.X. 1996, Ap&SS, 235, 255-262

The optical variability of the Seyfert galaxies NGC 4051 and NGC 1068

21. Xie, G.Z., Li, K.H., Zhang, Y.H., Liu, F.K., Fan, J.H., Wang, J.C A&AS, 1994, 106, 361-372

Simultaneous multirange observations and detection of rapid variability of BL Lacertae objects

22. Xie, G.Z., Zhang, Y.H., Fan, J.H., Liu, F.K. A&A, 1993, 278, 6-10

The relation between BL Lacertae objects and OVV quasars, and the unified model of BL Lacertae objects, FR-I and FR-II (G) radio galaxies