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courses:ast403:jwst-early-galaxies [2026/03/26 08:05] shuvocourses:ast403:jwst-early-galaxies [2026/03/28 01:23] (current) – [Record-Breaking Discoveries: The JADES Survey] shuvo
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 Astronomers use the exact same logic as optical dropouts, but scaled up to JWST's infrared filters: Astronomers use the exact same logic as optical dropouts, but scaled up to JWST's infrared filters:
  
-**Finding a $z \approx 10$ Galaxy:** The Lyman break is shifted to about $1.0 \mu m$. The galaxy will be completely invisible in the F090W filter, but will suddenly appear in the F115W filter and beyond. This is an **F090W-dropout**.\\ +**Finding a $z \approx 10$ Galaxy:** The Lyman break is shifted to about $1.0 \mu m$. The galaxy will be completely invisible in the F090W filter, but will suddenly appear in the F115W filter and beyond. This is an F090W-dropout.\\ 
-* **Finding a $z \approx 13$ Galaxy:** The break shifts to roughly $1.27 \mu m$. The galaxy now drops out of both the F090W and F115W filters, but lights up in the F150W filter. This is an **F115W-dropout**.+* **Finding a $z \approx 13$ Galaxy:** The break shifts to roughly $1.27 \mu m$. The galaxy now drops out of both the F090W and F115W filters, but lights up in the F150W filter. This is an F115W-dropout.
  
 +[{{ :courses:ast403:jwst_lyman.webp | Fig 1: Location of Lyman-breaks in various JWST bands. }}]
 ===== Record-Breaking Discoveries: The JADES Survey ===== ===== Record-Breaking Discoveries: The JADES Survey =====
 This specific technique has allowed JWST to shatter distance records almost immediately after it began operations.  This specific technique has allowed JWST to shatter distance records almost immediately after it began operations. 
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 * Its Lyman-break is pushed so far into the infrared that it doesn't even begin to appear until JWST's F150W and F200W filters! * Its Lyman-break is pushed so far into the infrared that it doesn't even begin to appear until JWST's F150W and F200W filters!
  
-By combining the simple but brilliant physics of the Lyman-break with the sheer infrared power of JWST, astronomers are finally able to map the very edge of the observable universe+By combining the simple but brilliant physics of the Lyman-break with the sheer infrared power of JWST, astronomers are finally able to map the very edge of the observable Universe 
 + 
 +[{{ :courses:ast403:stsci-01hz08hbszyhda52nppb1bp4sr.png?600 | Fig 2: NIRCAM image of JADES-GS-z14-0.}}] 
 + 
 +[{{ :courses:ast403:galaxy_jades-gs-z14-0_spectrum.jpg?600 | Fig 3: Spectrum of JADES-GS-z14-0.}}]
  
  
courses/ast403/jwst-early-galaxies.1774533926.txt.gz · Last modified: by shuvo

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