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Tuning Gravitationally Lensed Standard Sirens
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Department of Astronomy.
2007 (English)In: The Astrophysical Journal, Vol. 658, no 1, 52-59 p.Article in journal (Refereed) Published
Abstract [en]

Gravitational waves emitted by chirping supermassive black hole binaries could in principle be used to obtain very accurate distance determinations. Provided they have an electromagnetic counterpart from which the redshift can be determined, these standard sirens could be used to build a high-redshift Hubble diagram. Errors in the distance measurements will most likely be dominated by gravitational lensing. We show that the (de)magnification due to inhomogeneous foreground matter will increase the scatter in the measured distances by a factor of ~10. We propose to use optical and IR data of the foreground galaxies to minimize the degradation from weak lensing. We find that the net effect of correcting the estimated distances for lensing is comparable to increasing the sample size by a factor of 3 when using the data to constrain cosmological parameters.

Place, publisher, year, edition, pages
2007. Vol. 658, no 1, 52-59 p.
Keyword [en]
Cosmology: Cosmological Parameters, Cosmology: Gravitational Lensing, Gravitational Waves
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-11335DOI: doi:10.1086/510832ISI: 000244928900005OAI: diva2:177854
Available from: 2008-01-11 Created: 2008-01-11 Last updated: 2011-01-11Bibliographically approved

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Mörtsell, Edvard
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Department of PhysicsDepartment of Astronomy
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