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The Search for the Most Distant Galaxies
Add to Calendar 2023-09-21T19:45:00 2023-09-21T21:00:00 UTC The Search for the Most Distant Galaxies Davey Laboratory 538
Start DateThu, Sep 21, 2023
3:45 PM
End DateThu, Sep 21, 2023
5:00 PM
Presented By
Dr. Marcia Rieke
Event Series: Marker Lecture Series | Astronomy Special Seminar

One of the original rationales for building JWST was to move beyond the limitations of the Hubble Space
Telescope in the search for the first galaxies to form. This search is now yielding fruit as the results of JADES, the
JWST Advanced Deep Extragalactic Survey. JADES uses 800 hours of observing time largely from the NIRCam 
and NIRSpec Instrument Teams.  By always using NIRCam in parallel with either NIRSpec or MIRI, the effective 
data gathering time is doubled. This program has already pushed the redshift limit to z~13.2 with more to come.
Spectroscopy has revealed surprises such as a galaxy observed at an age of only 700 million years that has so
much carbon that a 2175 Angstrom extinction bump is seen. Other surprises include detection of more z>7 galaxies 
than predicted and many galaxies with extremely strong emission lines.

Astro Colloquium and 'coffee & cookies' department gathering (3:30-3:45pm)

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