Webb Study Reveals Rocky Planets Can Form in Extreme Environments : 無料・フリー素材/写真
Webb Study Reveals Rocky Planets Can Form in Extreme Environments / James Webb Space Telescope
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Rocky planets may be able to form in harsher environments than we thought. Webb detected key building blocks of planets, including water and carbon dioxide, in a rocky planet-forming zone being hit by extreme amounts of ultraviolet radiation.Planets are formed from disks of gas, dust and rock surrounding stars. The specific disk Webb observed, XUE 1, is near several massive stars. These stars emit high levels of ultraviolet radiation, which scientists expected would disperse gas and break apart chemical molecules.To the team’s surprise, Webb found partially crystalline silicate dust, plus various molecules (water, carbon monoxide, carbon dioxide, hydrogen cyanide, acetylene) that can form rocky planets. It’s the first time such molecules have been detected under these extreme conditions.Learn more: www.nasa.gov/missions/webb/webb-study-reveals-rocky-plane...This image: This spectrum shows data from the protoplanetary disk termed XUE 1, which is located in the star cluster Pismis 24. The inner disk around XUE 1 revealed signatures of water (highlighted here in blue), as well as acetylene (C2H2, green), hydrogen cyanide (HCN, brown), and carbon dioxide (CO2, red). As indicated, some of the emission detected was weaker than some of the predicted models, which might imply a small outer disk radius.Credit: NASA, ESA, CSA, M. Ramírez-Tannus (Max Planck Institute for Astronomy), J. Olmsted (STScI)[Image description: Graphic titled “XUE 1 Irradiated Protoplanetary Disk, MIRI Medium -Resolution Spectroscopy” shows a graph of brightness on the y-axis versus wavelength of light in microns on the x-axis. An arrow pointing down along the y-axis reads “dimmer;” arrow pointing up reads “brighter.” (There are no values or tick marks on the y-axis.) The x-axis ranges from 13.3 microns on the left to 15.5 microns on the right, labeled in even increments of 0.5 microns, starting at 13.5. A key in the upper right corner shows that model data are plotted in purple and Webb data are plotted in white. Both the model and data form jagged lines with numerous peaks and valleys. The model and data do not match perfectly, but the general trends align. Four sets of peaks are highlighted and labeled. (1) Acetylene, C 2 H 2—highlighted in green; centered around 13.7 microns. (2) Hydrogen Cyanide, H C N—brown; 14.0 microns. (3) Water, H 2 O—blue; 14.2 microns. (4) Carbon Dioxide, C O 2—bright red; 14.95 microns.] |
| 撮影日 | 2023-11-30 16:20:33 |
| 撮影者 | James Webb Space Telescope , Greenbelt, MD, USA |
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