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News Release Archive:

News Release 87 of 124

October 26, 1998 12:00 AM (EST)

News Release Number: STScI-1998-37

New Research That Uses Gravitationally Lensed Quasars to Measure Universe is Good News, Bad News for Cosmologists

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Image: Split, Distorted Light From Quasar PG1115+080 (left) and a Stretched Ring of Galactic Light (right)

Split, Distorted Light From Quasar PG1115+080 (left) and a Stretched Ring of Galactic Light (right)STScI-PRC1998-37

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ABOUT THIS IMAGE:

Left: The light from the single quasar PG 1115+080 is split and distorted in this infrared image. PG 1115+080 is at a distance of about 8 billion light years in the constellation Leo, and it is viewed through an elliptical galaxy lens at a distance of 3 billion light years. The NICMOS frame is taken at a wavelength of 1.6 microns and it shows the four images of the quasar (the two on the left are nearly merging) surrounding the galaxy that causes the light to be lensed. The quasar is a variable light source and the light in each image travels a different path to reach the Earth. The time delay of the variations allows the distance scale to be measured directly. The linear streaks on the image are diffraction artifacts in the NICMOS instrument (NASA/Space Telescope Science Institute).

Right: In this NICMOS image, the four quasar images and the lens galaxy have been subtracted, revealing a nearly complete ring of infrared light. This ring is the stretched and amplified starlight of the galaxy that contains the quasar, some 8 billion light years away. (NASA/Space Telescope Science Institute).

Object Name: PG1115+080

Image Type: Astronomical/Annotated

Credit: Christopher D. Impey (University of Arizona)

NEWS RELEASE IMAGES

The above montage includes these images:

Split, Distorted Light from Quasar PG1115+080 in Infrared Image Type: Astronomical Split, Distorted Light from Quasar PG1115+080 in Infrared A Stretched Ring of Galactic Light from Quasar PG1115+080 in Infrared Image Type: Astronomical A Stretched Ring of Galactic Light from Quasar PG1115+080 in Infrared

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