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Schneider, Yvonne; Weiß, U.; Rohm, Harald

doi:10.1002/9781444323740.ch12

Cited by 22 publications

(23 citation statements)

References 25 publications

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“…The action of a gravitational lens on the plane of polarization of electromagnetic radiation from a distant source has been found to be negligible to first order, according to the result by DS. We describe the gravitational lens with a Newtonian potential, as customary in the conventional gravitational lens theory (Bourassa et al 1973;Bourassa & Kantowski 1975;Schneider 1985;Blandford & Narayan 1986;Blandford & Kochanek 1988). This approach is alternative to that of DS, but it is obviously limited to situations in which the assumptions needed to apply the standard scalar or vector formalism (based on the use of a post-Newtonian metric) hold.…”

Section: Discussionmentioning

confidence: 99%

The rotation of polarization by gravitational waves

Faraoni

2008

New Astronomy

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There are conflicting statements in the literature about the gravitational Faraday rotation of the plane of polarization of polarized electromagnetic radiation travelling through a gravitational wave. This issue is reconsidered using a simple formalism describing the rotation of the plane of polarization in a gravitational field, in the geometric optics approximation. It is shown that, to first order in the gravitational wave amplitude, the rotation angle is a boundary effect which vanishes for localized (astrophysically generated) gravitational waves and is non-zero, but nevertheless negligible, for cosmological gravitational waves.Comment: 11 pages, latex, to appear in New Astronom

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Section: Discussionmentioning

confidence: 99%

The rotation of polarization by gravitational waves

Faraoni

2008

New Astronomy

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“…For brevity, we refer the reader to Suyu et al (2006Suyu et al ( , 2013 and Cappellari (2008), which cover in detail the theory and application of each to real observational data. Here, we confine ourselves to a description of the main formalisms, following the strong lensing and stellar dynamical framework developed and formulated in Schneider (1985); Schneider et al (1992); Blandford & Narayan (1986) and Binney & Tremaine (1987).…”

Section: Historical Contextmentioning

confidence: 99%

Time-delay cosmographic forecasts with strong lensing and JWST stellar kinematics

Yıldırım

Suyu

Halkola³

2020

Monthly Notices of the Royal Astronomical Society

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We present a joint strong lensing and stellar dynamical framework for future time-delay cosmography purposes. Based on a pixelated source reconstruction and the axisymmetric Jeans equations, we are capable of constraining cosmological distances and hence the current expansion rate of the Universe (H 0 ) to the few percent level per lens, when high signal-to-noise integral field unit (IFU) observations from the next generation of telescopes become available. For illustrating the power of this method, we mock up IFU stellar kinematic data of the prominent lens system RXJ1131−1231, given the specifications of the James Webb Space Telescope. Our analysis shows that the time-delay distance (D ∆t ) can be constrained with 3.1% uncertainty at best, if future IFU stellar kinematics are included in the fit and if the set of candidate model parameterisations contains the true lens potential. These constraints would translate to a 3.2% precision measurement on H 0 in flat ΛCDM cosmology from the single lens RXJ1131−1231, and can be expected to yield an H 0 measure with 2.0% uncertainty, if similar gains in precision can be reached for two additional lens systems. Moreover, the angular diameter distance (D d ) to RXJ1131−1231 can be constrained with 2.4% precision, providing two distance measurements from a single lens system, which is extremely powerful to further constrain the matter density (Ω m ). The measurement accuracy of D d , however, is highly sensitive to any systematics in the measurement of the stellar kinematics. For both distance measurements, we strongly advise to probe a large set of physically motivated lens potentials in the future, to minimise the systematic errors associated with the lens mass parameterisation.

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“…If the source itself is variable, these variations will appear at different times in different images. The time delay between image points θi and θj of the same source point β, is then given by ∆tij ≡ t(θi, β) − t(θj, β) where (Schneider 1985;Schneider et al 1992). Here, the pre-factor also includes the redshift z d of the gravitational lens.…”

Section: Gravitational Lensing Formalismmentioning

confidence: 99%

Extended lens reconstructions with grale: exploiting time-domain, substructural, and weak lensing information

Liesenborgs

Williams

Wagner

et al. 2020

Monthly Notices of the Royal Astronomical Society

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The information about the mass density of galaxy clusters provided by the gravitational lens effect has inspired many inversion techniques. In this article, updates to the previously introduced method in Grale are described, and explored in a number of examples. The first looks into a different way of incorporating time delay information, not requiring the unknown source position. It is found that this avoids a possible bias that leads to "over-focusing" the images, i.e. providing source position estimates that lie in a considerably smaller region than the true positions. The second is inspired by previous reconstructions of the cluster of galaxies MACS J1149.6+2223, where a multiply-imaged background galaxy contained a supernova, SN Refsdal, of which four additional images were produced by the presence of a smaller cluster galaxy. The inversion for the cluster as a whole, was not able to recover sufficient detail interior to this quad. We show how constraints on such different scales, from the entire cluster to a single member galaxy, can now be used, allowing such small scale substructures to be resolved. Finally, the addition of weak lensing information to this method is investigated. While this clearly helps recover the environment around the strong lensing region, the mass sheet degeneracy may make a full strong and weak inversion difficult, depending on the quality of the ellipticity information at hand. We encounter ring-like structure at the boundary of the two regimes, argued to be the result of combining strong and weak lensing constraints, possibly affected by degeneracies.

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Packaging Materials and Equipment

Cited by 22 publications

References 25 publications

The rotation of polarization by gravitational waves

The rotation of polarization by gravitational waves

Time-delay cosmographic forecasts with strong lensing and JWST stellar kinematics

Extended lens reconstructions with grale: exploiting time-domain, substructural, and weak lensing information

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