File:Uncrowding Cepheids in the Near Infrared (01H9K3F02AXWNJPRPAPBRSN53P).png
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[edit]DescriptionUncrowding Cepheids in the Near Infrared (01H9K3F02AXWNJPRPAPBRSN53P).png |
English: This diagram illustrates the combined power of the Hubble and Webb space telescopes in nailing down precise distances to a special class of variable star that is used in calibrating the expansion rate of the universe. These Cepheid variable stars are seen in crowded star fields. Light contamination from surrounding stars may make the measurement of the brightness of a Cepheid less precise. Webb’s sharper infrared vision allows for a Cepheid target to be more clearly isolated from surrounding stars, as seen in the right side of the diagram. The Webb data confirms the accuracy of 30 years of Hubble observations of Cepheids that were critical in establishing the bottom rung of the cosmic distance ladder for measuring the universe’s expansion rate. At the left, NGC 5584 is seen in a composite image from Webb’s NIRCam (Near-Infrared Camera) and Hubble’s Wide Field Camera 3.
Read the story. NASA, ESA, CSA, Adam G. Riess (JHU, STScI) Joyce Kang (STScI) |
Date | 12 September 2023 (upload date) |
Source | Uncrowding Cepheids in the Near Infrared |
Author | Science NASA, ESA, CSA, Adam G. Riess (JHU, STScI) Illustration Joyce Kang (STScI) |
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[edit]Public domainPublic domainfalsefalse |
This file is in the public domain because it was created by NASA, ESA and CSA. NASA Webb material is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA/CSA is credited as the source of the material. This license does not apply if source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-03127. Copyright statement at webbtelescope.org. For material created by the European Space Agency on the esawebb.org site, use the {{ESA-Webb}} tag. |
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current | 10:30, 14 September 2023 | 3,000 × 1,694 (5.18 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://stsci-opo.org/STScI-01H9QRKVBV2SM8KWD56H3W3BN2.png via Commons:Spacemedia |
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Author | Space Telescope Science Institute Office of Public Outreach |
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Credit/Provider | NASA, ESA, CSA, A. Riess (STScI/JHU), J. Kang(STScI), A. Pagan (STScI) |
Source | STScI |
Usage terms | |
Date and time of data generation | 10:00, 12 September 2023 |
Color space | sRGB |
Exif version | 2.31 |
Image width | 3,000 px |
Image height | 1,694 px |
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Height | 1,694 px |
Width | 3,000 px |
Pixel composition | RGB |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Contact information | outreach@stsci.edu
3700 San Martin Drive Baltimore, MD, 21218 USA |
Keywords | NGC 5584 |
Date and time of digitizing | 10:10, 30 August 2022 |
Date metadata was last modified | 04:04, 7 September 2023 |
Unique ID of original document | D7B395DD9A43FE0827C69C8CB40FE77F |
Copyright status | Copyright status not set |
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image/png
1,694 pixel
3,000 pixel
5,431,623 byte
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12 September 2023
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