2023ApJ...946L..15K

Query : 2023ApJ...946L..15K

2023ApJ...946L..15K - Astrophys. J., 946, L15 (2023/March-3)

CEERS Key Paper. III. The Diversity of Galaxy Structure and Morphology at z = 3-9 with JWST.

KARTALTEPE J.S., ROSE C., VANDERHOOF B.N., McGRATH E.J., COSTANTIN L., COX I.G., YUNG L.Y.A., KOCEVSKI D.D., WUYTS S., FERGUSON H.C., BAGLEY M.B., FINKELSTEIN S.L., AMORIN R.O., ANDREWS B.H., ARRABAL HARO P., BACKHAUS B.E., BEHROOZI P., BISIGELLO L., CALABRO A., CASEY C.M., COOGAN R.T., COOPER M.C., CROTON D., DE LA VEGA A., DICKINSON M., FONTANA A., FRANCO M., GRAZIAN A., GROGIN N.A., HATHI N.P., HOLWERDA B.W., HUERTAS-COMPANY M., IYER K.G., JOGEE S., JUNG I., KEWLEY L.J., KIRKPATRICK A., KOEKEMOER A.M., LIU J., LOTZ J.M., LUCAS R.A., NEWMAN J.A., PACIFICI C., PANDYA V., PAPOVICH C., PENTERICCI L., PEREZ-GONZALEZ P.G., PETERSEN J., PIRZKAL N., RAFELSKI M., RAVINDRANATH S., SIMONS R.C., SNYDER G.F., SOMERVILLE R.S., STANWAY E.R., STRAUGHN A.N., TACCHELLA S., TRUMP J.R., VEGA-FERRERO J., WILKINS S.M., YANG G. and ZAVALA J.A.

Abstract (from CDS):

We present a comprehensive analysis of the evolution of the morphological and structural properties of a large sample of galaxies at z = 3-9 using early James Webb Space Telescope (JWST) CEERS NIRCam observations. Our sample consists of 850 galaxies at z > 3 detected in both Hubble Space Telescope (HST)/WFC3 and CEERS JWST/NIRCam images, enabling a comparison of HST and JWST morphologies. We conduct a set of visual classifications, with each galaxy in the sample classified three times. We also measure quantitative morphologies across all NIRCam filters. We find that galaxies at z > 3 have a wide diversity of morphologies. Galaxies with disks make up 60% of galaxies at z = 3, and this fraction drops to ∼30% at z = 6-9, while galaxies with spheroids make up ∼30%-40% across the redshift range, and pure spheroids with no evidence for disks or irregular features make up ∼20%. The fraction of galaxies with irregular features is roughly constant at all redshifts (∼40%-50%), while those that are purely irregular increases from ∼12% to ∼20% at z > 4.5. We note that these are apparent fractions, as many observational effects impact the visibility of morphological features at high redshift. On average, Spheroid-only galaxies have a higher Sérsic index, smaller size, and higher axis ratio than disk or irregular galaxies. Across all redshifts, smaller spheroid and disk galaxies tend to be rounder. Overall, these trends suggest that galaxies with established disks and spheroids exist across the full redshift range of this study, and further work with large samples at higher redshift is needed to quantify when these features first formed.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galaxy evolution - Galaxy classification systems - Galaxies - Disk galaxies - Irregular galaxies - Hubble classification scheme

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Extended Groth Strip reg 14 19 +52.8           ~ 1023 0

Query : 2023ApJ...946L..15K

Basic data :
NAME Extended Groth Strip -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		14 19 00.0 +52 48 00 [ ] E ~
FK4 coord. (ep=B1950 eq=1950) : 		14 17 16.3 +53 01 45 [ ]
Gal coord. (ep=J2000) : 		096.4814 +59.5977 [ ]
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NAME EGS NAME Extended Groth Strip

References (1023 between 1850 and 2026) (Total 1023)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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