Constraints on the cosmic distance duality relation with simulated data of gravitational waves from the Einstein Telescope

Yang, Tao; Holanda, R. F. L.; Hu, Bambi

doi:10.1016/j.astropartphys.2019.01.005

Cited by 41 publications

(48 citation statements)

References 118 publications

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“…2015;Liao et al 2016). Therefore, to some degree, Yang et al 2019 actually tested the flatness of the Universe rather than a more profound space-time nature. Also noted by us is the work by Rana et al 2017, they used 12 realistic time delay lenses to infer the D A , and compared them with D L from SNe Ia.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…There are two benefits: firstly, the propagation of GWs is unaffected by cosmic opacity; secondly, they provide the direct luminosity distances while SNe Ia in principle provide the relative dis-tances. On the other hand, the angular diameter distance ratios from strong lensing observation carry the information of D A (Liao et al 2016;Yang et al 2019). For an ideal model assuming the elliptical lens galaxy is described by a Singular Isothermal Sphere (SIS), once the Einstein radius (R E ) and the central velocity dispersion σ v are measured by the separation angle of AGN multiimages and the spectroscopy, one can infer the ratio of two angular diameter distances D A ls /D A s ∝ θ E /σ 2 v , where the subscripts l, s denote for lens and source, respectively.…”

Section: Introductionmentioning

confidence: 99%

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The Cosmic Distance Duality Relation with Strong Lensing and Gravitational Waves: An Opacity-free Test

Liao

2019

ApJ

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The cosmic distance duality relation (CDDR) is a fundamental assumption in cosmological studies. Given the redshift z, it relates luminosity distance D L with angular diameter distance D A through (1 + z) 2 D A /D L ≡ 1. Many efforts have been devoted to test the CDDR with various observational approaches. However, to the best of our knowledge, those methods are always affected by cosmic opacity which could make the CDDR violated due to the non-conservation of photon number. Such mechanism is more related with astropartical physics. In this work, to directly study the nature of space-time, i.e., to disentangle it from astropartical physics, we propose a new strategy to test the CDDR with strong lensing providing D A and gravitational wave providing D L . It is known that the propagation of gravitational wave is unaffected by cosmic opacity. We demonstrate distances from optical lensing observation are also opacity-free. These two kinds of distance measurements make it possible to test any metric theories of gravity where photons travel along null geodesics. Our results show the constraints on deviations of the CDDR will be very competitive to current techniques.

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Section: Conclusion and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Cosmic Distance Duality Relation with Strong Lensing and Gravitational Waves: An Opacity-free Test

Liao

2019

ApJ

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“…More specifically, a completely model independent approach will be used to constrain cosmic opacity using the time-delay observations of strong gravitational lensing systems as standard rulers. Based on a reliable knowledge about the lensing system, i.e., the Einstein radius (from image astrometry) and stellar velocity dispersion (form central velocity dispersion obtained from spectroscopy), one can use it to derive the information of ADDs (Grillo et al 2008;Biesiada, Piórkowska, & Malec 2010;Cao, Covone & Zhu 2012;Cao et al , 2013Li et al 2016;Cao et al 2017a;Ma et al 2019), test the weak-field metric on kiloparsec scales (Cao et al 2015;Collett et al 2018), and probe the distance duality relation in a cosmological model independent approach (Liao et al 2016;Yang et al 2019). In addition, multiple images of the lensed variable sources take different time to complete their travel and the time delay is a function of the Fermat potential difference, and three angular diameter distances between the observer, lens, and source (Treu et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Testing Cosmic Opacity with the Combination of Strongly Lensed and Unlensed Supernova Ia

Ma¹,

Cao²,

Zhang³

et al. 2019

ApJ

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In this paper, we present a scheme to investigate the opacity of the Universe in a cosmological-modelindependent way, with the combination of current and future measurements of type Ia supernova sample and galactic-scale strong gravitational lensing systems with SNe Ia acting as background sources. The observational data include the current newly-compiled SNe Ia data (Pantheon sample) and simulated sample of SNe Ia observed by the forthcoming Large Synoptic Survey Telescope (LSST) survey, which are taken for luminosity distances (D L ) possibly affected by the cosmic opacity, as well as strongly lensed SNe Ia observed by the LSST, which are responsible for providing the observed time-delay distance (D ∆t ) unaffected by the cosmic opacity. Two parameterizations, τ (z) = 2βz and τ (z) = (1 + z) 2β − 1 are adopted for the optical depth associated to the cosmic absorption. Focusing on only one specific type of standard cosmological probe, this provides an original method to measure cosmic opacity at high precision. Working on the simulated sample of strongly lensed SNe Ia observed by the LSST in 10 year z-band search, our results show that, with the combination of the current newly-compiled SNe Ia data (Pantheon sample), there is no significant deviation from the transparency of the Universe at the current observational data level. Moreover, strongly lensed SNe Ia in a 10 year LSST z-band search would produce more robust constraints on the validity of cosmic transparency (at the precision of ∆β = 10 −2 ), with a larger sample of unlensed SNe Ia detected in future LSST survey. We have also discussed the ways in which our methodology could be improved, with the combination of current and future available data in gravitational wave (GW) and electromagnetic (EM) domain. Therefore, the proposed method will allow not only to check the foundations of observational cosmology (a transparent universe), but also open the way to identify completely new physics (non-standard physics).

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“…When the waveform of GW are known, one can calculate the signal-to-noise ratio (SNR). The SNR plays a very crucial role in detection of the GW event, because a GW detection is confirmed if the combined SNR of at least 8 is found in the Einstein Telescope [82,83] (see also [56,57,59,84] for more details in this direction). In general, the combined SNR for the network employing three independent interferometers (just like in the Einstein Telescope) is:…”

Section: Methods Of Simulating Gw Data and Its Usementioning

confidence: 99%

Future constraints on dynamical dark-energy using gravitational-wave standard sirens

Yang

et al. 2019

Phys. Rev. D

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The detection of gravitational waves (GW) by the LIGO and Virgo collaborations offers a whole new range of possible tests and opens up a new window which may shed light on the nature of dark energy and dark matter. In the present work we investigate how future gravitational waves data could help to constrain different dynamical dark energy models. In particular, we perform cosmological forecastings of a class of well known and most used dynamical dark energy models using the third-generation gravitational wave detector, the Einstein Telescope. We have considered 1000 simulated GW events in order to constrain the parameter space of the dynamical dark energy models. Our analyses show that the inclusion of the GW data from the Einstein Telescope, significantly improves the parameter space of the dynamical dark energy models compared to their constraints extracted from the standard cosmological probes, namely, the cosmic microwave observations, baryon acoustic oscillations distance measurements, Supernove type Ia, and the Hubble parameter measurements. 95.36.+x, 95.35.+d, 98.80.Es

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Constraints on the cosmic distance duality relation with simulated data of gravitational waves from the Einstein Telescope

Cited by 41 publications

References 118 publications

The Cosmic Distance Duality Relation with Strong Lensing and Gravitational Waves: An Opacity-free Test

The Cosmic Distance Duality Relation with Strong Lensing and Gravitational Waves: An Opacity-free Test

Testing Cosmic Opacity with the Combination of Strongly Lensed and Unlensed Supernova Ia

Future constraints on dynamical dark-energy using gravitational-wave standard sirens

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