JWST NIRSpec High-resolution Spectroscopy of MACS0647-JD at z = 10.167
QB460-466
Galaxy spectroscopy
Astrophysics of Galaxies (astro-ph.GA)
Strong gravitational lensing
High-redshift galaxies
Early universe
FOS: Physical sciences
Galaxies
Astrophysics
Astrophysics - Astrophysics of Galaxies
DOI:
10.48550/arxiv.2404.16201
Publication Date:
2024-09-01
AUTHORS (29)
ABSTRACT
Abstract We present JWST/NIRSpec high-resolution G395H/F290LP spectroscopy of MACS0647−JD, a gravitationally lensed galaxy merger at z = 10.167. The new spectroscopy, which is acquired for the two lensed images (JD1 and JD2), detects and resolves emission lines in the rest-frame ultraviolet and blue optical, including the resolved [O ii] λ λ3726, 3729 doublet, [Ne iii] λ3870, He i λ3890, Hδ, Hγ, and [O iii] λ4363. This is the first observation of the resolved [O ii] λ λ3726, 3729 doublet for a galaxy at z > 8. We measure a line flux ratio [O ii] λ3729/λ3726 = 0.9 ± 0.3, which corresponds to an estimated electron density of log ( n e / cm − 3 ) = 2.9 ± 0.5 . This is significantly higher than the electron densities of local galaxies reported in the literature. We compile measurements from the literature and further analyze the redshift evolution of n e . We find that the redshift evolution follows the power-law form of n e = A × (1 + z) p with A = 54 − 23 + 31 cm−3 and p = 1.2 − 0.4 + 0.4 . This power-law form may be explained by a combination of metallicity and morphological evolution of galaxies, which become, on average, more metal poor and more compact with increasing redshift.
SUPPLEMENTAL MATERIAL
Coming soon ....
REFERENCES ()
CITATIONS ()
EXTERNAL LINKS
PlumX Metrics
RECOMMENDATIONS
FAIR ASSESSMENT
Coming soon ....
JUPYTER LAB
Coming soon ....