UDFj-39546284 is a high-redshift Lyman-break galaxy discovered by the Hubble Space Telescope in infrared Hubble Ultra-Deep Field (HUDF) observations in 2009. The object, located in the Fornax constellation, was identified by G. Illingworth (UC Santa Cruz), R. Bouwens (UC Santa Cruz and Leiden University) and the HUDF09 Team during 2009 and 2010.[6][7] It was reported with a redshift of z~10 using Hubble and Spitzer Space Telescope photometric data,[3] with later reports in 2012 suggesting a possibly higher redshift of z = 11.9[8][3] Although doubts were raised that this galaxy could instead be a low-redshift interloper with extreme spectral emission lines producing the appearance of a very high redshift source,[4][3] later spectroscopic observations by the James Webb Space Telescope's NIRSpec instrument in 2022 confirmed the galaxy's high redshift to a spectroscopically confirmed estimate of z = 11.58.[2]
| UDFj-39546284 | |
|---|---|
 Hubble Space Telescope image of UDFj-39546284 (seen as a reddish spot in the center of the image) | |
| Observation data (J2000 epoch) | |
| Constellation | Fornax |
| Right ascension | 03h 32m 39.54s[1] |
| Declination | −27° 46′ 28.5″[1] |
| Redshift | 11.58+0.05 −0.05[2] [3][4] |
| Apparent magnitude (V) | V fainter than 30.1[5] H160 = 28.92 ± 0.18[5] J125 – H160 > 2[5] |
| Other designations | |
| [MDB2013] UDF12-3954-6285, JADES-GS-z11-0 | |
Gallery
edit-
UDFj-39546284 -
UDFj-39546284 appears as a faint red blob
See also
editReferences
edit- ^ a b "[MDB2013] UDF12-3954-6284". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-13.
- ^ a b Robertson, B. E.; et al. (2023). "Identification and properties of intense star-forming galaxies at redshifts z > 10". Nature Astronomy. 7 (5): 611–621. arXiv:2212.04480. doi:10.1038/s41550-023-01921-1. S2CID 257968812.
- ^ a b c d Bouwens, R. J.; Oesch, P. A.; Illingworth, G. D.; Labbé, I.; Van Dokkum, P. G.; Brammer, G.; Magee, D.; Spitler, L. R.; Franx, M.; Smit, R.; Trenti, M.; Gonzalez, V.; Carollo, C. M. (2013). "Photometric Constraints on the Redshift of z ~ 10 Candidate UDFj-39546284 from Deeper WFC3/IR+ACS+IRAC Observations over the HUDF". The Astrophysical Journal Letters. 765 (1): L16. arXiv:1211.3105. Bibcode:2013ApJ...765L..16B. doi:10.1088/2041-8205/765/1/L16.
- ^ a b Brammer, Gabriel B.; Van Dokkum, Pieter G.; Illingworth, Garth D.; Bouwens, Rychard J.; Labbé, Ivo; Franx, Marijn; Momcheva, Ivelina; Oesch, Pascal A. (2013). "A Tentative Detection of an Emission Line at 1.6 μm for the z ~ 12 Candidate UDFj-39546284". The Astrophysical Journal Letters. 765 (1): L2. arXiv:1301.0317. Bibcode:2013ApJ...765L...2B. doi:10.1088/2041-8205/765/1/L2. S2CID 119226564.
- ^ a b c R.J. Bouwens; G.D. Illingworth; I. Labbe; P.A. Oesch; M. Carollo; M. Trenti; P.G. van Dokkum; M. Franx; M. Stiavelli; V. Gonzalez; D. Magee; Bradley (2011). "A candidate redshift z ~ 10 galaxy and rapid changes in that population at an age of 500 Myr". Nature. 469 (7331): 504–507. arXiv:0912.4263. Bibcode:2011Natur.469..504B. doi:10.1038/nature09717. PMID 21270889. S2CID 4425674.
- ^ Staff (January 28, 2011). "Most Distant Galaxy Candidate Ever Seen in Universe". NASA. Retrieved December 13, 2012.
- ^ Staff. "Picture Album: Gray-scale Image of Object UDFj-39546284 from HUDF WFC3/IR". Space Telescope Science Institute. Retrieved December 13, 2012.
- ^ Wall, Mike (December 12, 2012). "Ancient Galaxy May Be Most Distant Ever Seen". Space.com. Retrieved December 12, 2012.
External links
edit