The Hubble Space Telescope quasar absorption line key project: The unusual absorption-line system in the spectrum of PG 2302+029 - Ejected or intervening?

B. T. Jannuzi; G. F. Hartig; S. Kirhakos; W. L.W. Sargent; D. A. Turnshek; R. J. Weymann; J. N. Bahcall; J. Bergeron; A. Boksenberg; B. D. Savage; D. P. Schneider; A. M. Wolfe

doi:10.1086/310301

The Hubble Space Telescope quasar absorption line key project: The unusual absorption-line system in the spectrum of PG 2302+029 - Ejected or intervening?

B. T. Jannuzi, G. F. Hartig, S. Kirhakos, W. L.W. Sargent, D. A. Turnshek, R. J. Weymann, J. N. Bahcall, J. Bergeron, A. Boksenberg, B. D. Savage, D. P. Schneider, A. M. Wolfe

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Abstract

We report the discovery of a high-ionization broad absorption line system at a redshift of z_abs = 0.695 in the spectrum of the z_em = 1.052 radio-quiet quasar PG 2302+029. Broad absorption with FWHM from 3000 to 5000 km s^-1 is detected from C IV, N V, and O VI in Hubble Space Telescope (HST) Faint Object Spectrograph spectra of the quasar. A narrow-line system (FWHM ∼ 250 km s^-1) at z_abs = 0.7016 is resolved from the broad blend and includes absorption by Lyα and the C IV, N V, and O VI doublets. No absorption by low-ionization metal species (e.g., Si II and Mg II) is detected in the HST or ground-based spectra for either the broad or the narrow system. The centroids of the broad system lines are displaced by ∼56,000 km s^-1 to the blue of the quasar's broad emission lines. The reddest extent of the broad-line absorption is more than 50,000 km s^-1 from the quasar. The properties of this system are unprecedented, whether it is an intervening or an ejected system.

Original language	English (US)
Pages (from-to)	L11-L14
Journal	Astrophysical Journal
Volume	470
Issue number	1 PART II
DOIs	https://doi.org/10.1086/310301
State	Published - Oct 10 1996
Externally published	Yes

Keywords

Cosmology: observations
Galaxies: clusters: general
Intergalactic medium
Quasars: absorption lines

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/310301

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Jannuzi, B. T., Hartig, G. F., Kirhakos, S., Sargent, W. L. W., Turnshek, D. A., Weymann, R. J., Bahcall, J. N., Bergeron, J., Boksenberg, A., Savage, B. D., Schneider, D. P., & Wolfe, A. M. (1996). The Hubble Space Telescope quasar absorption line key project: The unusual absorption-line system in the spectrum of PG 2302+029 - Ejected or intervening? Astrophysical Journal, 470(1 PART II), L11-L14. https://doi.org/10.1086/310301

Jannuzi, BT, Hartig, GF, Kirhakos, S, Sargent, WLW, Turnshek, DA, Weymann, RJ, Bahcall, JN, Bergeron, J, Boksenberg, A, Savage, BD, Schneider, DP & Wolfe, AM 1996, 'The Hubble Space Telescope quasar absorption line key project: The unusual absorption-line system in the spectrum of PG 2302+029 - Ejected or intervening?', Astrophysical Journal, vol. 470, no. 1 PART II, pp. L11-L14. https://doi.org/10.1086/310301

@article{51912922483b4f719359811c10198f64,

title = "The Hubble Space Telescope quasar absorption line key project: The unusual absorption-line system in the spectrum of PG 2302+029 - Ejected or intervening?",

abstract = "We report the discovery of a high-ionization broad absorption line system at a redshift of zabs = 0.695 in the spectrum of the zem = 1.052 radio-quiet quasar PG 2302+029. Broad absorption with FWHM from 3000 to 5000 km s-1 is detected from C IV, N V, and O VI in Hubble Space Telescope (HST) Faint Object Spectrograph spectra of the quasar. A narrow-line system (FWHM ∼ 250 km s-1) at zabs = 0.7016 is resolved from the broad blend and includes absorption by Lyα and the C IV, N V, and O VI doublets. No absorption by low-ionization metal species (e.g., Si II and Mg II) is detected in the HST or ground-based spectra for either the broad or the narrow system. The centroids of the broad system lines are displaced by ∼56,000 km s-1 to the blue of the quasar's broad emission lines. The reddest extent of the broad-line absorption is more than 50,000 km s-1 from the quasar. The properties of this system are unprecedented, whether it is an intervening or an ejected system.",

keywords = "Cosmology: observations, Galaxies: clusters: general, Intergalactic medium, Quasars: absorption lines",

author = "Jannuzi, {B. T.} and Hartig, {G. F.} and S. Kirhakos and Sargent, {W. L.W.} and Turnshek, {D. A.} and Weymann, {R. J.} and Bahcall, {J. N.} and J. Bergeron and A. Boksenberg and Savage, {B. D.} and Schneider, {D. P.} and Wolfe, {A. M.}",

note = "Funding Information: This work was supported by contracts NAG5-1618 and NAG5-3259, and grant GO-5343.01 from the STScI, which is operated by the A.U.R.A., Inc., under NASA contract NAS5-26555. We thank Digital Equipment Corporation for providing the DEC4000 AXP Model 610 system that was used for portions of this work. Much of the Key Project software was written by D. Saxe and R. Deverill. Helpful discussions with J. Charlton, J. Hill, R. Green, M. Strauss, and A. Tanner are appreciated. We thank C. Foltz for the suggestion that the absorption might be produced by a supernovae remnant. We thank F. Hamann, T. Barlow, and V. Junkkarinen for sharing their paper on Q2343+125 with us prior to its publication.",

year = "1996",

month = oct,

day = "10",

doi = "10.1086/310301",

language = "English (US)",

volume = "470",

pages = "L11--L14",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1 PART II",

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T1 - The Hubble Space Telescope quasar absorption line key project

T2 - The unusual absorption-line system in the spectrum of PG 2302+029 - Ejected or intervening?

AU - Jannuzi, B. T.

AU - Hartig, G. F.

AU - Kirhakos, S.

AU - Sargent, W. L.W.

AU - Turnshek, D. A.

AU - Weymann, R. J.

AU - Bahcall, J. N.

AU - Bergeron, J.

AU - Boksenberg, A.

AU - Savage, B. D.

AU - Schneider, D. P.

AU - Wolfe, A. M.

N1 - Funding Information: This work was supported by contracts NAG5-1618 and NAG5-3259, and grant GO-5343.01 from the STScI, which is operated by the A.U.R.A., Inc., under NASA contract NAS5-26555. We thank Digital Equipment Corporation for providing the DEC4000 AXP Model 610 system that was used for portions of this work. Much of the Key Project software was written by D. Saxe and R. Deverill. Helpful discussions with J. Charlton, J. Hill, R. Green, M. Strauss, and A. Tanner are appreciated. We thank C. Foltz for the suggestion that the absorption might be produced by a supernovae remnant. We thank F. Hamann, T. Barlow, and V. Junkkarinen for sharing their paper on Q2343+125 with us prior to its publication.

PY - 1996/10/10

Y1 - 1996/10/10

N2 - We report the discovery of a high-ionization broad absorption line system at a redshift of zabs = 0.695 in the spectrum of the zem = 1.052 radio-quiet quasar PG 2302+029. Broad absorption with FWHM from 3000 to 5000 km s-1 is detected from C IV, N V, and O VI in Hubble Space Telescope (HST) Faint Object Spectrograph spectra of the quasar. A narrow-line system (FWHM ∼ 250 km s-1) at zabs = 0.7016 is resolved from the broad blend and includes absorption by Lyα and the C IV, N V, and O VI doublets. No absorption by low-ionization metal species (e.g., Si II and Mg II) is detected in the HST or ground-based spectra for either the broad or the narrow system. The centroids of the broad system lines are displaced by ∼56,000 km s-1 to the blue of the quasar's broad emission lines. The reddest extent of the broad-line absorption is more than 50,000 km s-1 from the quasar. The properties of this system are unprecedented, whether it is an intervening or an ejected system.

AB - We report the discovery of a high-ionization broad absorption line system at a redshift of zabs = 0.695 in the spectrum of the zem = 1.052 radio-quiet quasar PG 2302+029. Broad absorption with FWHM from 3000 to 5000 km s-1 is detected from C IV, N V, and O VI in Hubble Space Telescope (HST) Faint Object Spectrograph spectra of the quasar. A narrow-line system (FWHM ∼ 250 km s-1) at zabs = 0.7016 is resolved from the broad blend and includes absorption by Lyα and the C IV, N V, and O VI doublets. No absorption by low-ionization metal species (e.g., Si II and Mg II) is detected in the HST or ground-based spectra for either the broad or the narrow system. The centroids of the broad system lines are displaced by ∼56,000 km s-1 to the blue of the quasar's broad emission lines. The reddest extent of the broad-line absorption is more than 50,000 km s-1 from the quasar. The properties of this system are unprecedented, whether it is an intervening or an ejected system.

KW - Cosmology: observations

KW - Galaxies: clusters: general

KW - Intergalactic medium

KW - Quasars: absorption lines

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U2 - 10.1086/310301

DO - 10.1086/310301

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AN - SCOPUS:15444375072

SN - 0004-637X

VL - 470

SP - L11-L14

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART II

ER -

The Hubble Space Telescope quasar absorption line key project: The unusual absorption-line system in the spectrum of PG 2302+029 - Ejected or intervening?

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