Open AccessA Chandra observation of the z = 2.285 galaxy FSC 10214+4724: evidence for a Compton‐thick quasar?
Author(s) -
Alexander D. M.,
Chartas G.,
Bauer F. E.,
Brandt W. N.,
Simpson C.,
Vignali C.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society: letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.067
H-Index - 122
eISSN - 1745-3933
pISSN - 1745-3925
DOI - 10.1111/j.1745-3933.2005.08621.x
Subject(s) - physics , astrophysics , quasar , redshift , galaxy , gravitational lens , active galactic nucleus , astronomy , star formation
We present a ≈20 ks Chandra ACIS‐S observation of the strongly lensed z = 2.285 ultraluminous infrared galaxy FSC 10214 + 4724. Although this observation achieves the equivalent sensitivity of an up to ≈4 Ms Chandra exposure (when corrected for gravitational lensing), the rest‐frame 1.6–26.3 keV emission from FSC 10214 + 4724 is weak ( L X ≈ 2 × 10 42 erg s −1 for a lensing boost of ≈100); a significant fraction of this X‐ray emission appears to be due to vigorous star formation activity. If FSC 10214 + 4724 hosts a quasar, as previously suggested, then it must be obscured by Compton‐thick material. We compare FSC 10214 + 4724 to high‐redshift SCUBA galaxies and discuss the X‐ray identification of Compton‐thick AGNs at high redshift.