2024ApJ...963...54P

Query : 2024ApJ...963...54P

2024ApJ...963...54P - Astrophys. J., 963, 54 (2024/March-1)

Galaxies Going Bananas: Inferring the 3D Geometry of High-redshift Galaxies with JWST-CEERS.

PANDYA V., ZHANG H., HUERTAS-COMPANY M., IYER K.G., McGRATH E., BARRO G., FINKELSTEIN S.L., KUMMEL M., HARTLEY W.G., FERGUSON H.C., KARTALTEPE J.S., PRIMACK J., DEKEL A., FABER S.M., KOO D.C., BRYAN G.L., SOMERVILLE R.S., AMORIN R.O., ARRABAL HARO P., BAGLEY M.B., BELL E.F., BERTIN E., COSTANTIN L., DAVE R., DICKINSON M., FELDMANN R., FONTANA A., GAVAZZI R., GIAVALISCO M., GRAZIAN A., GROGIN N.A., GUO Y., HAHN C., HOLWERDA B.W., KEWLEY L.J., KIRKPATRICK A., KOCEVSKI D.D., KOEKEMOER A.M., LOTZ J.M., LUCAS R.A., PAPOVICH C., PENTERICCI L., PEREZ-GONZALEZ P.G., PIRZKAL N., RAVINDRANATH S., ROSE C., SCHEFER M., SIMONS R.C., STRAUGHN A.N., TACCHELLA S., TRUMP J.R., DE LA VEGA A., WILKINS S.M., WUYTS S., YANG G. and YUNG L.Y.A.

Abstract (from CDS):

The 3D geometries of high-redshift galaxies remain poorly understood. We build a differentiable Bayesian model and use Hamiltonian Monte Carlo to efficiently and robustly infer the 3D shapes of star-forming galaxies in James Webb Space Telescope Cosmic Evolution Early Release Science observations with $\mathrm{log}{M}_{* }/{M}_{\odot }=9.0\mbox{--}10.5$ at z = 0.5-8.0. We reproduce previous results from the Hubble Space Telescope Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey in a fraction of the computing time and constrain the mean ellipticity, triaxiality, size, and covariances with samples as small as ∼50 galaxies. We find high 3D ellipticities for all mass-redshift bins, suggesting oblate (disky) or prolate (elongated) geometries. We break that degeneracy by constraining the mean triaxiality to be ∼1 for $\mathrm{log}{M}_{* }/{M}_{\odot }=9.0\mbox{--}9.5$ dwarfs at z > 1 (favoring the prolate scenario), with significantly lower triaxialities for higher masses and lower redshifts indicating the emergence of disks. The prolate population traces out a “banana” in the projected $b/a\mbox{--}\mathrm{log}a$ diagram with an excess of low-b/a, large-$\mathrm{log}a$ galaxies. The dwarf prolate fraction rises from ∼25% at z = 0.5-1.0 to ∼50%-80% at z = 3-8. Our results imply a second kind of disk settling from oval (triaxial) to more circular (axisymmetric) shapes with time. We simultaneously constrain the 3D size-mass relation and its dependence on 3D geometry. High-probability prolate and oblate candidates show remarkably similar Sérsic indices (n ∼ 1), nonparametric morphological properties, and specific star formation rates. Both tend to be visually classified as disks or irregular, but edge-on oblate candidates show more dust attenuation. We discuss selection effects, follow-up prospects, and theoretical implications.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): High-redshift galaxies - Galaxy classification systems - Dwarf galaxies - Galaxy structure - James Webb Space Telescope - Galaxy disks - Galaxy spheroids - Galaxy radii - Galaxy masses

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

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 : 2024ApJ...963...54P

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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