2024-02-10 12:00:19
This image captures the center of the barred spiral galaxy NGC 1365, located approximately 56 million light years away in the constellation Fornax. It was created based on data obtained by the near-infrared camera (NIRCam) and mid-infrared observation instrument (MIRI) of the James Webb Space Telescope (JWST). Because the Webb Space Telescope primarily observes at infrared wavelengths that cannot be seen by the human eye, the colors of published images are colored according to the filters used during acquisition.
[▲Barredspiralgalaxy”NGC1365″observedbytheJamesWebbSpaceTelescope’sNearInfraredCamera(NIRCam)andMid-InfraredObservatory(MIRI)(Credit:NASAESACSASTScIJaniceLee(STScI)ThomasWilliams(Oxford)PHANGSTeam)
According to the Space Telescope Science Institute (STScI), which operates the Webb Space Telescope, NIRCam data (colored in blue and green) shows that infrared radiation emitted by young, hot stars that appear blue in visible light is compared to MIRI data (colored in green and red). (colored) shows infrared rays re-radiated by dust that has absorbed ultraviolet rays and visible rays. The dust is spread out like a skeleton supporting spiral arms, and hot stars are densely packed here and there to form star clusters.
Next is NGC 1365, which was observed by the Wide Field Camera 3 (WFC3) of the Hubble Space Telescope (HST). The orientation and size have been adjusted to match the Webb Space Telescope image posted earlier, so some data may be missing.
[▲ Barred spiral galaxy “NGC 1365” observed by the Hubble Space Telescope’s Wide Field Camera 3 (WFC3) (Credit: NASA, ESA, CSA, STScI, Janice Lee (STScI), Thomas Williams (Oxford), PHANGS Team) ]
Comparing the two images, you can see that the dust distribution captured by the Webb Space Telescope appears as a series of dark nebulae in the Hubble Space Telescope image. In addition, although the central region, where many old stars are concentrated and a supermassive black hole is thought to be lurking, is bright in both cases, the diffraction spikes
that occur when the light source is very bright and compact are It only occurs in Webb Space Telescope images.
*…Diffraction spike is a beam of light produced by the structure of the telescope. For example, the Hubble Space Telescope (HST) has a simple cross-shaped diffraction spike, while the Webb Space Telescope has hexagonal mirror segments that make up the primary mirror and three that support the secondary mirror. It has a unique shape that combines diffraction spikes caused by book props.
The observation of NGC 1365 by the Webb Space Telescope was carried out as part of the observation project “PHANGS” (Physics at High Angular resolution in Nearby GalaxieS), which targets galaxies in the nearby universe. This project, which includes the Hubble Space Telescope, Chile’s ALMA radio telescope group, and the European Southern Observatory’s (ESO) Very Large Telescope (VLT) located at the Paranal Observatory in Chile, will High-resolution observations using electromagnetic waves of various wavelengths have been carried out for several years to understand star formation.
The Webb Space Telescope, a new member of the project, has observed bubble-like and filament-like structures that tell the story of star formation cycles on the smallest scale ever, surprising even researchers who have studied the same galaxy for many years. It means that there is. The image at the beginning is one of 19 nearby galaxies observed by the Webb Space Telescope as part of the PHANGS project, and was released by STScI, the National Aeronautics and Space Administration (NASA), and the European Space Agency (ESA) on January 29, 2024. .
[▲ Reference image: Overall image of the barred spiral galaxy “NGC 1365” taken with the Blanco 4m telescope at Cerro Tololo Pan-American Observatory (Credit: Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA, Image processing: Travis Rector (University of Alaska Anchorage/NSF’s NOIRLab), Jen Miller (Gemini Observatory/NSF’s NOIRLab), Mahdi Zamani & Davide de Martin (NSF’s NOIRLab)]
- Source STScI
- – Webb and Hubble’s Views of Spiral Galaxy NGC 1365 STScI
- – NASA’s Webb Depicts Staggering Structure in 19 Nearby Spiral Galaxies NASA
- – NASA’s Webb Depicts Staggering Structure in 19 Nearby Spiral Galaxies ESA
– Webb reveals structure in 19 spiral galaxies
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