2025NatAs...9..141B

Query : 2025NatAs...9..141B

2025NatAs...9..141B - Nature Astronomy, 9, 141-154 (2025/January-0)

A core in a star-forming disc as evidence of inside-out growth in the early Universe.

BAKER W.M., TACCHELLA S., JOHNSON B.D., NELSON E., SUESS K.A., D'EUGENIO F., CURTI M., DE GRAAFF A., JI Z., MAIOLINO R., ROBERTSON B., SCHOLTZ J., ALBERTS S., ARRIBAS S., BOYETT K., BUNKER A.J., CARNIANI S., CHARLOT S., CHEN Z., CHEVALLARD J., CURTIS-LAKE E., DANHAIVE A.L., DECOURSEY C., EGAMI E., EISENSTEIN D.J., ENDSLEY R., HAUSEN R., HELTON J.M., KUMARI N., LOOSER T.J., MASEDA M.V., PUSKAS D., RIEKE M., SANDLES L., SUN F., UBLER H., WILLIAMS C.C., WILLMER C.N.A. and WITSTOK J.

Abstract (from CDS):

The physical processes that establish the morphological evolution and the structural diversity of galaxies are key unknowns in extragalactic astrophysics. Here we report the finding of the morphologically mature galaxy JADES-GS+53.18343-27.79097, which existed within the first 700 million years of the Universe's history. This star-forming galaxy with a stellar mass of 400 million solar masses consists of three components: a highly compact core with a half-light radius of less than 100 pc, an actively star-forming disc with a radius of about 400 pc and a star-forming clump, all of which show distinctive star-formation histories. The central stellar mass density of this galaxy is within a factor of 2 of the most massive present-day ellipticals, while being globally 1,000 times less massive. The radial profile of the specific star-formation rate is rising towards the outskirts. This evidence suggests a detection of the inside-out growth of a galaxy as a proto-bulge and a star-forming disc in the epoch of reionization.


Abstract Copyright: 2024 The Author(s)

Journal keyword(s):

Simbad objects: 3

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Number of rows : 3
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 GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1623 1
2 [LBW2013] GS.D-YD4 G 03 32 44.00208 -27 47 27.2786           ~ 15 0
3 JADES-GS+053.18343-27.79097 EmG 03 32 44.02 -27 47 27.5           ~ 6 0

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