Microlensing of the broad-line region in the quadruply imaged quasar HE0435-1223

L. Braibant, D. Hutsemékers, D. Sluse, T. Anguita, C. J. García-Vergara

Resultado de la investigación: Article

12 Citas (Scopus)

Resumen

Using infrared spectra of the z = 1.693 quadruply lensed quasar HE0435-1223 acquired in 2009 with the spectrograph SINFONI at the ESO Very Large Telescope, we have detected a clear microlensing effect in images A and D. While microlensing affects the blue and red wings of the Hα line profile in image D very differently, it de-magnifies the line core in image A. The combination of these different effects sets constraints on the line-emitting region; these constraints suggest that a rotating ring is at the origin of the Hα line. Visible spectra obtained in 2004 and 2012 indicate that the MgII line profile is microlensed in the same way as the Hα line. Our results therefore favour flattened geometries for the low-ionization line-emitting region, for example, a Keplerian disk. Biconical models cannot be ruled out but require more fine-tuning. Flux ratios between the different images are also derived and confirm flux anomalies with respect to estimates from lens models with smooth mass distributions.

Idioma originalEnglish
Número de artículoL11
PublicaciónAstronomy and Astrophysics
Volumen565
DOI
EstadoPublished - 2014

Huella dactilar

H lines
quasars
visible spectrum
profiles
European Southern Observatory
mass distribution
wings
spectrographs
ionization
infrared spectra
tuning
lenses
telescopes
anomalies
anomaly
geometry
rings
estimates
effect

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Braibant, L. ; Hutsemékers, D. ; Sluse, D. ; Anguita, T. ; García-Vergara, C. J. / Microlensing of the broad-line region in the quadruply imaged quasar HE0435-1223. En: Astronomy and Astrophysics. 2014 ; Vol. 565.
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abstract = "Using infrared spectra of the z = 1.693 quadruply lensed quasar HE0435-1223 acquired in 2009 with the spectrograph SINFONI at the ESO Very Large Telescope, we have detected a clear microlensing effect in images A and D. While microlensing affects the blue and red wings of the Hα line profile in image D very differently, it de-magnifies the line core in image A. The combination of these different effects sets constraints on the line-emitting region; these constraints suggest that a rotating ring is at the origin of the Hα line. Visible spectra obtained in 2004 and 2012 indicate that the MgII line profile is microlensed in the same way as the Hα line. Our results therefore favour flattened geometries for the low-ionization line-emitting region, for example, a Keplerian disk. Biconical models cannot be ruled out but require more fine-tuning. Flux ratios between the different images are also derived and confirm flux anomalies with respect to estimates from lens models with smooth mass distributions.",
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Microlensing of the broad-line region in the quadruply imaged quasar HE0435-1223. / Braibant, L.; Hutsemékers, D.; Sluse, D.; Anguita, T.; García-Vergara, C. J.

En: Astronomy and Astrophysics, Vol. 565, L11, 2014.

Resultado de la investigación: Article

TY - JOUR

T1 - Microlensing of the broad-line region in the quadruply imaged quasar HE0435-1223

AU - Braibant, L.

AU - Hutsemékers, D.

AU - Sluse, D.

AU - Anguita, T.

AU - García-Vergara, C. J.

PY - 2014

Y1 - 2014

N2 - Using infrared spectra of the z = 1.693 quadruply lensed quasar HE0435-1223 acquired in 2009 with the spectrograph SINFONI at the ESO Very Large Telescope, we have detected a clear microlensing effect in images A and D. While microlensing affects the blue and red wings of the Hα line profile in image D very differently, it de-magnifies the line core in image A. The combination of these different effects sets constraints on the line-emitting region; these constraints suggest that a rotating ring is at the origin of the Hα line. Visible spectra obtained in 2004 and 2012 indicate that the MgII line profile is microlensed in the same way as the Hα line. Our results therefore favour flattened geometries for the low-ionization line-emitting region, for example, a Keplerian disk. Biconical models cannot be ruled out but require more fine-tuning. Flux ratios between the different images are also derived and confirm flux anomalies with respect to estimates from lens models with smooth mass distributions.

AB - Using infrared spectra of the z = 1.693 quadruply lensed quasar HE0435-1223 acquired in 2009 with the spectrograph SINFONI at the ESO Very Large Telescope, we have detected a clear microlensing effect in images A and D. While microlensing affects the blue and red wings of the Hα line profile in image D very differently, it de-magnifies the line core in image A. The combination of these different effects sets constraints on the line-emitting region; these constraints suggest that a rotating ring is at the origin of the Hα line. Visible spectra obtained in 2004 and 2012 indicate that the MgII line profile is microlensed in the same way as the Hα line. Our results therefore favour flattened geometries for the low-ionization line-emitting region, for example, a Keplerian disk. Biconical models cannot be ruled out but require more fine-tuning. Flux ratios between the different images are also derived and confirm flux anomalies with respect to estimates from lens models with smooth mass distributions.

KW - Galaxies: active

KW - Gravitational lensing: micro

KW - Quasars: emission lines

KW - Quasars: individual: HE0435-1223

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