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

doi:10.1086/187410

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

Steward Observatory

Research output: Contribution to journal › Article › peer-review

16 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 (F_v ∝ v^α), steeper than would be expected from a young burst of star formation but similar to that of many AGNs.

Original language	English (US)
Pages (from-to)	L49-L52
Journal	Astrophysical Journal
Volume	429
Issue number	2 PART 2
DOIs	https://doi.org/10.1086/187410
State	Published - Jul 10 1994

Keywords

Galaxies: peculiar
Galaxies: starburst
Polarization

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/187410

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title = "The hidden nuclear spectrum of the luminous IRAS source FSC 10214+4724",

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.",

keywords = "Galaxies: peculiar, Galaxies: starburst, Polarization",

author = "Jannuzi, {Buell T.} and Richard Elston and Schmidt, {Gary D.} and Smith, {Paul S.} and Stockman, {H. S.}",

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T1 - The hidden nuclear spectrum of the luminous IRAS source FSC 10214+4724

AU - Jannuzi, Buell T.

AU - Elston, Richard

AU - Schmidt, Gary D.

AU - Smith, Paul S.

AU - Stockman, H. S.

PY - 1994/7/10

Y1 - 1994/7/10

N2 - 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.

AB - 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.

KW - Galaxies: peculiar

KW - Galaxies: starburst

KW - Polarization

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IS - 2 PART 2

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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