High resolution deep imaging of a bright radio quiet QSO at z ∼ 3

Yi Ping Wang, Wei He, Toru Yamada, Ichi Tanaka, Masanori Iye, Tuo Ji

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We have obtained deep J and Ks-band images centered on a bright radio quiet QSO UM 402 (zem = 2.856) using the IRCS camera and adaptive optics systems that are part of the Subaru Telescope, as well as retrieved WFC3/F140W archive images of this object. A faint galaxy (mk = 23.32±0.05 in the Vega magnitude system) that lies ∼ 2.4″ north of the QSO sightline has been clearly resolved in all three deep high resolution datasets, and appears as an irregular galaxy with two close components in the Ks-band images (separation ∼ 0.3″). Given the small impact parameter (b = 19.6 kpc, at zlls = 2.531), as well as the red color of (J - Ks)Vega ∼ 1.6, it might be a candidate galaxy giving rise to the Lyman Limit system absorption at zabs = 2.531 seen in the QSO spectrum. After carefully subtracting the point spread function from the QSO images, the host galaxy of this bright radio quiet QSO at z ∼ 3 was marginally revealed. We placed a lower limit on the host component of mk ∼ 23.3 according to our analyses.

Original languageEnglish
Pages (from-to)673-686
Number of pages14
JournalResearch in Astronomy and Astrophysics
Issue number5
Publication statusPublished - 2015 May 1


  • galaxies: active
  • galaxies: high redshift
  • instrumentation: adaptive optics
  • quasars: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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