Structure of the Accretion Disk in the Lensed Quasar Q2237+0305 From Multi-Epoch and Multi-Wavelength Narrowband Photometry

Muñoz, J. A.; Vives-Arias, H.; Mosquera, A. M.; Jiménez-Vicente, J.; Kochanek, C. S.; Mediavilla, E.

doi:10.3847/0004-637x/817/2/155

Cited by 28 publications

(33 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The six brightness records for A and B, along with the well-sampled V-band light curves of both images from the Optical Gravitational Lensing Experiment (OGLE; Woźniak et al 2000;Udalski et al 2006), led to α = 1.2 ± 0.3, in good agreement with a standard accretion disc. This result agrees with that of Muñoz et al (2016) from a follow-up in six narrow bands in six epochs (α ≈ 1.0 ± 0.3), which is only marginally consistent with a standard disc, however.…”

Section: Introductionsupporting

confidence: 88%

“…The new measurement is more accurate than previous estimates based on chromatic variations of the Einstein Cross (e.g. Eigenbrod et al 2008;Muñoz et al 2016), suggesting that as the emission wavelength increases, the source radius grows more smoothly than the standard disc radius.…”

Section: Methodsmentioning

confidence: 57%

“…This estimate is fully consistent with a standard accretion disc (α = 4/3), and it is probably more representative (unbiased) than the other. Again we need to perform numerical microlensing simulations to robustly constrain the value of α, which has been measured from microlensing-induced chromatic variations to ∼25-30% precision (Eigenbrod et al 2008;Muñoz et al 2016), or to ∼10% formal precision, but in an ambiguous way (this paper).…”

Section: Discussionmentioning

confidence: 99%

“…Vakulik et al 2004), sev-Tables 4-8 and 10-14 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http: //cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/637/A89 eral studies indicated that microlensing-induced chromatic variations are fully or marginally consistent with radii that grow as λ α , α = 4/3 (standard disc model; e.g. Shalyapin et al 2002;Anguita et al 2008;Eigenbrod et al 2008;Poindexter et al 2008;Hainline et al 2013;Blackburne et al 2015;Muñoz et al 2016).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Liverpool-Maidanak monitoring of the Einstein Cross in 2006–2019

Goicoechea

Артамонов

Shalyapin

et al. 2020

A&A

View full text Add to dashboard Cite

Quasar microlensing offers a unique opportunity to resolve tiny sources in distant active galactic nuclei and study compact object populations in lensing galaxies. We therefore searched for microlensing-induced variability of the gravitationally lensed quasar QSO 2237+0305 (Einstein Cross) using 4374 optical frames taken with the 2.0 m Liverpool Telescope and the 1.5 m Maidanak Telescope. These gVrRI frames over the 2006–2019 period were homogeneously processed to generate accurate long-term multi-band light curves of the four quasar images A–D. Through difference light curves, we found strong microlensing signatures. We then focused on the analytical modelling of two putative caustic-crossing events in image C, finding compelling evidence that this image experienced a double caustic crossing. Additionally, our overall results indicate that a standard accretion disc accounts reasonably well for the brightness profile of UV continuum emission sources and for the growth in source radius when the emission wavelength increases: Rλ ∝ λα, α = 1.33 ± 0.09. However, we caution that numerical microlensing simulations are required before firm conclusions can be reached on the UV emission scenario because the VRI-band monitoring during the first caustic crossing and one of our two α indicators lead to a few good solutions with α ≈ 1.

show abstract

Section: Introductionsupporting

confidence: 88%

Section: Methodsmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Liverpool-Maidanak monitoring of the Einstein Cross in 2006–2019

Goicoechea

Артамонов

Shalyapin

et al. 2020

A&A

View full text Add to dashboard Cite

show abstract

“…Gravitationally lensed quasars are very well suited to study the inner structure of AGN (Pooley et al 2007;Anguita et al 2008;Bate et al 2008;Eigenbrod et al 2008;Poindexter et al 2008;Chartas et al 2009;Floyd et al 2009;Dai et al 2010;Morgan et al 2010;Blackburne et al 2011;Muñoz et al 2011;Chen et al 2012;Hainline et al 2012;Morgan et al 2012;Hainline et al 2013;Blackburne et al 2014;Jiménez-Vicente et al 2014MacLeod et al 2015;Mediavilla et al 2015a,b;Muñoz et al 2016). The magnification of lensed quasar images depends on the mass distribution of the lens galaxy and on geometrical considerations (distances and alignment between quasar, galaxy and observer).…”

Section: Introductionmentioning

confidence: 99%

Probing the Broad-Line Region and the Accretion Disk in the Lensed Quasars HE 0435-1223, WFI 2033-4723, and HE 2149-2745 Using Gravitational Microlensing

Motta

Mediavilla

Rojas

et al. 2017

ApJ

Self Cite

View full text Add to dashboard Cite

-2 -We use single-epoch spectroscopy of three gravitationally lensed quasars, HE0435-1223, WFI2033-4723, and HE2149-2745, to study their inner structure (BLR and continuum source). We detect microlensing-induced magnification in the wings of the broad emission lines of two of the systems (HE0435-1223 and WFI2033-4723). In the case of WFI2033-4723, microlensing affects two "bumps" in the spectra which are almost symmetrically arranged on the blue (coincident with an Al III emission line) and red wings of C III]. These match the typical double-peaked profile that follows from disk kinematics. The presence of microlensing in the wings of the emission lines indicates the existence of two different regions in the BLR: a relatively small one with kinematics possibly related to an accretion disk, and another one that is substantially more extended and insensitive to microlensing. There is good agreement between the estimated size of the region affected by microlensing in the emission lines, r s = 10 M/M ⊙ light-days. The estimates of p, the exponent of the size vs. wavelength (r s ∝ λ p ), are 1.2 ± 0.6, 0.8 ± 0.2, and 0.4 ± 0.3 for HE0435-1223, WFI2033-4723, and HE2149-2745, respectively. In conclusion, the continuum microlensing amplitude in the three quasars and chromaticity in WFI2033-4723 and HE2149-2745 are below expectations for the thin disk model. The disks are larger and their temperature gradients are flatter than predicted by this model.

show abstract

Microlensing of Strongly Lensed Quasars

Vernardos,

Sluse,

Pooley

et al. 2024

Space Sci Rev

View full text Add to dashboard Cite

Strong gravitational lensing of quasars has the potential to unlock the poorly understood physics of these fascinating objects, as well as serve as a probe of the lensing mass distribution and of cosmological parameters. In particular, gravitational microlensing by compact bodies in the lensing galaxy can enable mapping of quasar structure to $<10^{-6}$ < 10 − 6 arcsec scales. Some of this potential has been realized over the past few decades, however the upcoming era of large sky surveys promises to bring this promise to full fruition. In this article, we review the theoretical framework of this field, describe the prominent current methods for parameter inference from quasar microlensing data across different observing modalities, and discuss the constraints so far derived on the geometry and physics of quasar inner structure. We also review the application of strong lensing and microlensing to constraining the granularity of the lens potential, i.e. the contribution of the baryonic and dark matter components, and the local mass distribution in the lens, i.e. the stellar mass function. Finally, we discuss the future of the field, including the new possibilities that will be opened by the next generation of large surveys and by new analysis methods now being developed.

show abstract

Structure of the Accretion Disk in the Lensed Quasar Q2237+0305 From Multi-Epoch and Multi-Wavelength Narrowband Photometry

Cited by 28 publications

References 47 publications

Liverpool-Maidanak monitoring of the Einstein Cross in 2006–2019

Liverpool-Maidanak monitoring of the Einstein Cross in 2006–2019

Probing the Broad-Line Region and the Accretion Disk in the Lensed Quasars HE 0435-1223, WFI 2033-4723, and HE 2149-2745 Using Gravitational Microlensing

Microlensing of Strongly Lensed Quasars

Contact Info

Product

Resources

About