Early Results from GLASS-JWST. XVII. Building the First Galaxies—Chapter 1. Star Formation Histories for 5 < z < 7 Galaxies
Date Issued
2023
Author(s)
Dressler, Alan
•
•
Treu, Tommaso
•
Rieke, Marcia
•
Burns, Chris
•
•
•
•
•
Leethochawalit, Nicha
•
Mason, Charlotte
•
•
Morishita, Takahiro
•
•
Bradac, Marusa
•
•
Nanayakkara, Themiya
•
•
•
Wang, Xin
•
Misselt, Karl
•
Stark, Daniel P.
•
Willmer, Christopher
Abstract
The JWST observations of high-redshift galaxies are used to measure their star formation histories—the buildup of stellar mass in the earliest galaxies. Here we use a novel analysis program, SEDz*, to compare near-IR spectral energy distributions for galaxies with redshifts 5 < z < 7 to combinations of stellar population templates evolved from z = 12. We exploit NIRCam imaging in seven wide bands covering 1-5 μm taken in the context of the GLASS-JWST-ERS program and use SEDz* to solve for well-constrained star formation histories for 24 exemplary galaxies. In this first look, we find a variety of histories, from long, continuous star formation over 5 < z < 12 to short but intense starbursts, sometimes repeating, and, most commonly, contiguous mass buildup lasting ∼0.5 Myr, possibly the seeds of today’s typical M* galaxies.
Volume
947
Issue
2
Start page
L27
Issn Identifier
2041-8205
Rights
open.access
File(s)![Thumbnail Image]()
Loading...
Name
Dressler_2023_ApJL_947_L27.pdf
Description
Pdf editoriale
Size
3.57 MB
Format
Adobe PDF
Checksum (MD5)
0e3bfabd4e42064380346723409a4660