A Chandra observation of the z = 2.285 galaxy FSC 10214+4724: Evidence for a Compton-thick quasar?

D. M. Alexander; G. Chartas; F. E. Bauer; W. N. Brandt; C. Simpson; C. Vignali

doi:10.1111/j.1745-3933.2005.08621.x

A Chandra observation of the z = 2.285 galaxy FSC 10214+4724: Evidence for a Compton-thick quasar?

D. M. Alexander, G. Chartas, F. E. Bauer, W. N. Brandt, C. Simpson, C. Vignali

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Abstract

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 × 10⁴² 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.

Original language	English (US)
Pages (from-to)	L16-L20
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	357
Issue number	1
DOIs	https://doi.org/10.1111/j.1745-3933.2005.08621.x
State	Published - Feb 2005

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1111/j.1745-3933.2005.08621.x

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title = "A Chandra observation of the z = 2.285 galaxy FSC 10214+4724: Evidence for a Compton-thick quasar?",

abstract = "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 (LX ≈ 2 × 1042 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.",

author = "Alexander, {D. M.} and G. Chartas and Bauer, {F. E.} and Brandt, {W. N.} and C. Simpson and C. Vignali",

year = "2005",

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language = "English (US)",

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T1 - A Chandra observation of the z = 2.285 galaxy FSC 10214+4724

T2 - Evidence for a Compton-thick quasar?

AU - Alexander, D. M.

AU - Chartas, G.

AU - Bauer, F. E.

AU - Brandt, W. N.

AU - Simpson, C.

AU - Vignali, C.

PY - 2005/2

Y1 - 2005/2

N2 - 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 (LX ≈ 2 × 1042 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.

AB - 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 (LX ≈ 2 × 1042 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.

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A Chandra observation of the z = 2.285 galaxy FSC 10214+4724: Evidence for a Compton-thick quasar?

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