The HST quasar absorption line key project. IX. An emission-line study of PG 2251+113

Brian R. Espey, David A. Turnshek, Lincoln Lee, Jacqueline Bergeron, Alec Boksenberg, George F. Hartig, Buell Tomasson Jannuzi, W. L W Sargent, Blair D. Savage, Donald P. Schneider, Ray J. Weymann, Arthur M. Wolfe

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We present HST and quasi-simultaneous ground-based observations of the z = 0.3252 QSO PG 2251+113. We find a correlation between line widths and the critical density for de-excitation of the forbidden emission lines observed in this object. We can show that this correlation also applies to the semiforbidden and possibly also the permitted lines which arise in the broad emission-line region. While this result was predicted from statistical studies, it has never previously been shown to hold in detail in any individual object. This relationship between the narrow and broad emission-line regions may help constrain dynamical models of both regions. We examine the implications of this result for a simple radial infall model of the emitting gas developed to explain the origin of narrow-line profiles.

Original languageEnglish (US)
Pages (from-to)484-492
Number of pages9
JournalAstrophysical Journal
Volume434
Issue number2
StatePublished - Oct 20 1994
Externally publishedYes

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Keywords

  • Quasars: absorption lines
  • Ultraviolet: galaxies

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Espey, B. R., Turnshek, D. A., Lee, L., Bergeron, J., Boksenberg, A., Hartig, G. F., ... Wolfe, A. M. (1994). The HST quasar absorption line key project. IX. An emission-line study of PG 2251+113. Astrophysical Journal, 434(2), 484-492.

The HST quasar absorption line key project. IX. An emission-line study of PG 2251+113. / Espey, Brian R.; Turnshek, David A.; Lee, Lincoln; Bergeron, Jacqueline; Boksenberg, Alec; Hartig, George F.; Jannuzi, Buell Tomasson; Sargent, W. L W; Savage, Blair D.; Schneider, Donald P.; Weymann, Ray J.; Wolfe, Arthur M.

In: Astrophysical Journal, Vol. 434, No. 2, 20.10.1994, p. 484-492.

Research output: Contribution to journalArticle

Espey, BR, Turnshek, DA, Lee, L, Bergeron, J, Boksenberg, A, Hartig, GF, Jannuzi, BT, Sargent, WLW, Savage, BD, Schneider, DP, Weymann, RJ & Wolfe, AM 1994, 'The HST quasar absorption line key project. IX. An emission-line study of PG 2251+113', Astrophysical Journal, vol. 434, no. 2, pp. 484-492.
Espey BR, Turnshek DA, Lee L, Bergeron J, Boksenberg A, Hartig GF et al. The HST quasar absorption line key project. IX. An emission-line study of PG 2251+113. Astrophysical Journal. 1994 Oct 20;434(2):484-492.
Espey, Brian R. ; Turnshek, David A. ; Lee, Lincoln ; Bergeron, Jacqueline ; Boksenberg, Alec ; Hartig, George F. ; Jannuzi, Buell Tomasson ; Sargent, W. L W ; Savage, Blair D. ; Schneider, Donald P. ; Weymann, Ray J. ; Wolfe, Arthur M. / The HST quasar absorption line key project. IX. An emission-line study of PG 2251+113. In: Astrophysical Journal. 1994 ; Vol. 434, No. 2. pp. 484-492.
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AU - Boksenberg, Alec

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AU - Jannuzi, Buell Tomasson

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AU - Wolfe, Arthur M.

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