Correcting for lensing bias in the Hubble diagram
نویسنده
چکیده
Gravitational lensing will cause a dispersion in the Hubble diagram for high redshift sources. This effect will introduce a bias in the cosmological parameter determination using the distance-redshift relation for Type Ia supernovae. In this note we show how one can diagnose and correct for this bias when doing precision cosmology
منابع مشابه
Astronomy and Astrophysics Correcting for Lensing Bias in the Hubble Diagram
Gravitational lensing will cause a dispersion in the Hubble diagram for high redshift sources. This effect will introduce a bias in the cosmological parameter determination using the distance-redshift relation for Type Ia supernovae. In this note we show how one can diagnose and correct for this bias when doing precision cosmology with supernovae. A&A manuscript no. (will be inserted by hand la...
متن کاملLensing and Supernovae: Quantifying the Bias on the Dark Energy Equation of State
The gravitational magnification and demagnification of Type Ia supernovae (SNe) modify their positions on the Hubble diagram, shifting the distance estimates from the underlying luminosity-distance relation. This can introduce a systematic uncertainty in the dark energy equation of state (EOS) estimated from SNe, although this systematic is expected to average away for sufficiently large data s...
متن کاملCorrections for Gravitational Lensing of Supernovae: Better than Average?
We investigate the possibility of correcting for the magnification due to gravitational lensing of standard candle sources, such as Type Ia supernovae. Our method uses the observed properties of the foreground galaxies along the linesof-sight to each source and the accuracy of the lensing correction depends on the quality and depth of these observations as well as the uncertainties in translati...
متن کاملTuning Gravitationally Lensed Standard Sirens
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 gravitati...
متن کاملOptimal Galaxy Shape Measurements for Weak Lensing Applications Using the Hubble Space Telescope Advanced Camera for Surveys
We present three-epoch multiband (V606, i775, z850) measurements of galaxy shapes using the “polar shapelet” or Laguerre-expansions method with the Hubble Space Telescope (HST ) Advanced Camera for Surveys (ACS) data, obtained as part of the Great Observatories Origin Deep Survey (GOODS). We take advantage of the unique features of the GOODS/ACS Fields to test the reliability of this relatively...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002