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Liyong LIU   
Associate Professor

Institute:
NAOC, CAS

Email: liulynao.cas.cn 

Telephone: +86-10-64807639 

Postcode: 100012 

Address: 20A Datun Road, Chaoyang District, Beijing, China

Research Areas

    The atmospheric transparency and stability are the preferred indicators for evaluating the qualities of ground-based astronomical observatories. Atmospheric optical turbulence, resulting from small temperature and moisture fluctuations in the atmosphere, is a primary concern for astronomers because it dramatically affects the performance of high angular resolution imaging of large optical-infrared telescopes.
            My recent research work focuses on the detection of atmospheric optical turbulence and its repercussion for astronomical observations, by developing and then making use of some relevant instruments, such as DIMM(Differential Image Motion Monitor), MASS(Multi-Aperture Scintillation Sensor), and Single Star SCIDAR(Scintillation Detection and Ranging). Towards astronomical site survey project in western China, I have got much experience for exploration, instrument setup and monitoring observations, on the high plateau of Tibet and Pamirs.


Education
    April, 2012- April, 2013
            Postdoc, Laboratoire J.-L. LAGRANGE(UMR 7293), Université Nice Sophia   Antipolis / OCA
            Supervisors: Jean Vernin
    June, 2010
            Ph.D., Graduate University of the Chinese Academy of Sciences, Beijing, China
            Dissertation Topic: “Atmospheric Optical Turbulence Observations and Development of Single Star SCIDAR”
            Supervisors: Yao Yong Qiang
    June, 2006
            Master of Science, Graduate University of the Chinese Academy of Sciences, Beijing, China
           Thesis Topic: “Development of pulsar coherent de-dispersion software system”
            Supervisors: Ali Esamdin & Zhang Jin
    July, 2002
            Bachelor of Engineering, Henan University, Kaifeng, China
            Thesis Topic: “The multiplex temperature control system with monolithic computer”

Research Experience

    Projects (as PI)
    1 Research on key technologies of high-resolution imaging based on real-time atmospheric turbulence correction
    Financed by: National Nature Science Foundation of China (NO: 11373043, Duration: 2014.01 – 2017.12)
    2 Study of the SCIDAR Techniques for Remote Sensing of the Atmospheric Scintillation Profiles
    Financed by: National Nature Science Foundation of China (NO: 10903014, Duration: 2010.01 – 2012.12)
    3 Development of SCIDAR for site testing
    Financed by the Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences (Duration: 2009.01 – 2010.5)
    4 Detection of atmospheric turbulence with DIMM, MASS and Micro-Thermometry
    Financed by: the Knowledge Innovation Program of the Chinese Academy of Sciences (Duration: 2008.01 – 2010.5) 

    Projects (as Co-PI)
    1 First measurements of the radiative shock wave velocity
    Financed by: European Organisation for Astronomical Research in the Southern Hemisphere(ESO)
    Facilities: VLTI with AMBER (Duration: 2013.07 – 2013.09)

  • Work Experience
  • Teaching Experience

Honors & Distinctions
    1 Best Conference Paper Award, Annual Meeting of Atmospheric and Environmental Optics, 2008 
    2 Outstanding Graduate Student Award of Graduate University, Chinese Academy of Sciences, 2010

Publications
  • Papers

    1. M. Chadid, J. Vernin, G. Preston, C. Zalian, C. Pouzenc, L. Abe, A. Agabi, E. Aristidi, Liu L.Y., D. Mekarnia and H. Trinquet, First detection of multi-shocks in RR Lyrae stars from Antarctica - A possible explanation of t he Blazhko effect, A&A, 2014 

    2. L.-Y. Liu, C. Giordano, Y.-Q. Yao, J. Vernin, M. Chadid, H.-S. Wang, J. Yin, Y.-P. Wang, Optical Turbulence Characterization at LAMOST Site: Observations and Models, MNRAS, 2014

    3. Liu LiYong, Yao YongQiang, Jean Vernin, Wang HongShuai, Merieme Chadid, Wang YiPing, Christophe Giordano, Yin Jia, Qian Xuan, Optical turbulence profiling with single star Scidar technique, Chinese Science Bulletin, 2013, Vol. 58 No. 36, 4566–4570

    4. Li-Yong Liu, Yong-Qiang Yao, Jean Vernin, Merieme Chadid, Hong-Shuai Wang, Yi-Ping Wang, IAU Symposium, 2013, Volume 288, pp. 316-317

    5. Li-Yong Liu, Yong-Qiang Yao, Jean Vernin, Hong-Shuai Wang, Jia Yin, Xuan Qian, The Development of Single Star Scidar for Tibet and Dome A, The 11th Asian-Pacific Regional IAU Meeting, NARIT Conference Series, 2013, Vol.1, pp.405-408

    6. Li-Yong Liu, Yong-Qiang Yao, Yi-Ping Wang, Jun-Rong Li, Yun-He Zhou, Lin Li, Xian-Long You. The First Infrared Telescope in Tibet Plateau, China, The 11th Asian-Pacific Regional IAU Meeting, NARIT Conference Series, 2013, Vol.1, pp.426-427

    7. Liyong Liu, Yongqiang Yao, Jean Vernin, Merieme Chadid, Yiping Wang, Hongshuai Wang, Jia Yin, Christophe Giordano, Xuan Qian, Atmospheric turbulence measurements at Ali observatory, Tibet , Proc.of SPIE, Volume 8444, pp. 844464-844464-7, 2012 

    8. Li-Yong Liu, Yong-Qiang Yao, Yi-Ping Wang, Jiang-Long Ma, Bo-Liang He and Hong-Shuai Wang. Seeing measurements for the Guoshoujing Telescope (LAMOST) site with DIMM, Research in Astronomy and Astrophysics, 2010, Vol.10 No.10, 1061–1070 

    9. Liu Li-yong, Yao Yong-qiang, Detection technology of atmospheric optical turbulence for astronomical site, Progress in Astronomy, 2010, 28(4), 390-403 

    10. L.Y. Liu, Y.Q. Yao, J.C. Wang and Y. Shi, Meteorological conditions of the two astronomical candidate sites in west China, Proceedings of APRIM10th, 2009, p.366-367 

    11. LIU Li-yong, ALI Esamdin, ZHANG Jin. Pulsar Coherent De-dispersion System in the Urumqi Observatory, ASTRONOMICAL RESEARCH & TECHONOLGY, 2007, 4(1), 72-78 

    12. Liu LiYong,A.Esamdin,J.Zhang. Pulsar Coherent De-dispersion Experiment at Urumqi Observatory, Chin.J. Astron. Astrophys, 2006, Vol. 6(S2), 53-55 

    13. Yao Yongqiang, Wang Hongshuai, Liu Liyong, Wang Yiping,Site characterization studies in high plateau of Tibet, Proc.of SPIE, 2012, Volume 8444, pp.84441K-84441K-13

    14. Qian Xuan, Wang PanXing, Yao YongQiang, Wang GuoFu, Liu LiYong, Zhang YongJing, Time variation of astro-climate conditions in China, SCIENTIA SINICA Phys, Mech & Astron., 2011, 41(7), 896-910 

    15. Zhang YongJing, Wang PanXing, Yao YongQiang, Wang GuoFu, Liu LiYong, Qian Xuan, Climate regionalization in China for astronomical observations, SCIENTIA SINICA Phys, Mech & Astron., 2010, 40(10), 1302-1314 

    16. Shi Yang, Yao Yong-qiang, Liu Li-yong, A method for observing and counting day-time cloud amounts in an astronomical site survey, Astronomical Research & Technology, 2008, 5(4), 415-419 

    17. Y. Yao, J. Wang, L. Liu, G. Zhao, etc., Astronomical site survey and evaluation in west china, Proceedings of 10th Asian-Pacific Regional IAU meeting, Kunming, Yunnan, China, Augest 3–6, 2008, P 377–379

  • Patents

Research Interests

    The site survey in western China has been carried out since 2003, a new site named Gar(5100m) has been identified and begun construction in 2010. A precipitable water vapor (PWV) value of 0.5 to 1.5 mm at the summit of Gar, much lower than the most site in the world, which provides exceptional atmospheric transmission in the whole infrared wavelength. Therefore, the Gar site can be open new windows for infrared observations on the ground (Example for Mini-TAO, Tokyo university telescope in Chile). The infrared observations are very important for astronomical research, which enables us to peer through the veil of interstellar dust, and to detect the embeded objects.
            I plan to develop a set of Near and Mid-infrared cameras with international collaboration, which can be mounted on the 1.2-m telescope by Beijing Planetarium at Gar site. We can focus on hydrogen Paschenαemission line at 1.8751μm, which is one of the strongest in a typical HⅡregion, and we hope open the new infrared windows for ground-based telescope in 30μm wavelength. The above mentioned will forwards star formation activities.


Conferences
    1 L.Y. Liu, Y.Q. Yao, etc., Research on key technologies of infrared detection for 10-meter telescope, Contribution in workshop "The proposal of 10m optical / Infrared telescope", held May 29-30, 2013, in Xichang, China
    2 L.Y. Liu, Y.Q. Yao, etc., Scidar development and preliminary results Contribution in workshop "EACOA Site Survey Workshop", held April 4-10, 2012, in Beijing, China
    3 L.Y. Liu, Y.Q. Yao, etc., Seeing measurements at the astronomical observatories in China, Contribution in conference "Comprehensive characterization of astronomical sites", held October 4-10, 2010, in Kislovodsk, Russia
    4 L.Y. Liu, Y.Q. Yao, J.C. Wang, etc., Meteorological conditions of the two astronomical candidate sites in west china, the 10th Asian-Pacific Regional IAU meeting, Kunming, Yunnan, China, Augest 3–6, 2008
    5 L.Y. Liu, Y.Q. Yao, etc., The single star SCIDAR observations at Xinglong astronomical station, The 6th site testing conference, Sanya, China, May 4-7, 2011
    6 L.Y. Liu, Y.Q. Yao, etc., The Progress of Single Star SCIDAR for turbulence profile, The workshop for measurement of atmospheric optical turbulence, Beijing, China, December 19-21, 2010
    7 L.Y. Liu, Y.Q. Yao, Y.P. Wang, The atmospheric turbulence detection for site testing, The 3th advanced telescope and instrument technology conference, Haining, China, July 19-24, 2009
    8 L.Y. Liu, The results of DIMM observations at the western China site, the annual meeting of atmospheric and environmental optics, Wuyuan, China, October3-6, 2008
    9 L.Y. Liu, Measurement of the near ground atmospheric turbulence with micro-thermometry sensor, The annual conference of Chinese astronomical society, Jiaonan, China, Augest 28-31, 2008
    10 L.Y. Liu, Y.Q. Yao, etc., Progress in western astronomy site survey, The annual conference of Chinese astronomical society, Guangzhou, China, November 21-25, 2007

Collaboration
    1  Université Nice Sophia Antipolis
    2  Laboratoire J.-L. LAGRANGE(UMR 7293) / Observatoire de la Côte d’Azur
    3  Zhengzhou Institute of Surveying and Mapping

Students


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