The hidden nuclear spectrum of the luminous IRAS source FSC 10214+4724

Buell T. Jannuzi, Richard Elston, Gary D. Schmidt, Paul S. Smith, H. S. Stockman

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Optical spectropolarimetry of the luminous IRAS source FSC 10214+4724 (z = 2.286) reveals that the strong (∼17%) linear polarization detected by Lawrence et al. is shared by both the narrow UV emission lines and the underlying continuum. This observation and the brightness of the source rule out synchrotron emission and dichroic extinction by dust as the polarizing mechanism, leaving scattering as the only plausible cause of the polarized emission. The narrowness of the lines requires that the scatterers be dust grains or cool (below 1.6 × 104 K) electrons. We can recover the spectrum that is incident on the scattering medium provided we make some reasonable assumptions regarding the source geometry. The scattered UV spectrum has a power-law index α of -1.2 ± 0.6 (Fv ∝ vα), steeper than would be expected from a young burst of star formation but similar to that of many AGNs.

Original languageEnglish (US)
Pages (from-to)L49-L52
JournalAstrophysical Journal
Volume429
Issue number2 PART 2
StatePublished - Jul 10 1994
Externally publishedYes

Keywords

  • Galaxies: peculiar
  • Galaxies: starburst
  • Polarization

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Jannuzi, B. T., Elston, R., Schmidt, G. D., Smith, P. S., & Stockman, H. S. (1994). The hidden nuclear spectrum of the luminous IRAS source FSC 10214+4724. Astrophysical Journal, 429(2 PART 2), L49-L52.