Observational Properties of High-redshift Quasars and Galaxies

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Postdoctoral Researcher Opportunity

BHOLE Project

 

SUPERVISOR/HOST INSTITUTION: Linhua Jiang (Kavli Institute for Astronomy and Astrophysics, Peking University)

PROJECT TITLE: Observational Properties of High-redshift Quasars and Galaxies

PROJECT DESCRIPTION:  High-redshift (z >= 6) quasars are a powerful tool to study the early universe. In recent years, more than 100 high-redshift quasars have been discovered. But this sample is still too small to answer some critical questions such as the overall evolution of the quasar population at z > 6, and the quasar contribution to cosmic reionization. The goal of this project is twofold. One is to carry out a large search of high-redshift quasars using very large imaging datasets such as DESI imaging data (>10,000 square degrees; two magnitudes deeper than the SDSS). The other one is to carry out deep spectroscopic observations of known quasars to characterize their physical properties and their implications to cosmic reionization.

PROJECT REQUIREMENTS: General familiarity with handling of large astronomical data sets; general knowledge of AGNs and extragalactic astronomy; experience in high-redshift quasars and quasar search techniques.

SUPERVISOR’S CONTACT:  jiangKIAA@pku.edu.cn , http://kiaa.pku.edu.cn/~jiang/

RELEVANT PUBLICATIONS:

    1. Jiang, L., et al. 2017, ApJ, 846, 134, A Magellan M2FS Spectroscopic Survey of Galaxies at 5.5 < z < 6.8: Program Overview and a Sample of the Brightest Lyman-alpha Emitters
    2. Jiang, L., et al. 2016, ApJ, 833, 222, The Final SDSS High-redshift Quasar Sample of 52 Quasars at z>5.7
    3. Jiang, L., et al. 2015, ApJ, 816, 16, Physical Properties of Spectroscopically-Confirmed Galaxies at z≥6. III. Stellar Populations from SED Modeling with Secure Lyα Emission and Redshifts
    4. Jiang, L., et al. 2013, ApJ, 772, 99, Physical Properties of Spectroscopically-Confirmed Galaxies at z≥6. I. Basic Characteristics of the Rest-frame UV Continuum and Lyα Emission
    5. Jiang, L., et al. 2010, Nature, 464, 380, Dust-Free Quasars in the Early Universe
    6. Jiang, L., et al. 2008, AJ, 135, 1057, A Survey of z~6 Quasars in the SDSS Deep Stripe. I. A Flux-Limited Sample at zAB<21
    7. Jiang, L., et al. 2007, AJ, 134, 1150, Gemini Near-Infrared Spectroscopy of Luminous z~6 Quasars: Chemical Abundances, Black Holes Masses, and Mg II Absorptions