%0 Generic %1 naidu2022remarkably %A Naidu, Rohan P. %A Oesch, Pascal A. %A van Dokkum, Pieter %A Nelson, Erica J. %A Suess, Katherine A. %A Whitaker, Katherine E. %A Allen, Natalie %A Bezanson, Rachel %A Bouwens, Rychard %A Brammer, Gabriel %A Conroy, Charlie %A Illingworth, Garth %A Labbe, Ivo %A Leja, Joel %A Leonova, Ecaterina %A Matthee, Jorryt %A Price, Sedona H. %A Setton, David J. %A Strait, Victoria %A Stefanon, Mauro %A Tacchella, Sandro %A Toft, Sune %A Weaver, John R. %A Weibel, Andrea %D 2022 %K library %T Two Remarkably Luminous Galaxy Candidates at $z\approx11-13$ Revealed by JWST %U http://arxiv.org/abs/2207.09434 %X The first few hundred Myrs at $z>10$ mark the last major uncharted epoch in the history of the Universe, where only a single galaxy (GNz11 at $z\approx11$) is currently spectroscopically confirmed. Here we present a search for luminous $z>10$ galaxies with $JWST$/NIRCam photometry spanning $\approx1-5\mu$m and covering 49 arcmin$^2$ from the public $JWST$ Early Release Science programs (CEERS and GLASS). Our most secure candidates are two $M_UV\approx-21$ systems: GLASS-z13 and GLASS-z11. These galaxies display abrupt $\gtrsim2.5$ mag breaks in their spectral energy distributions, consistent with complete absorption of flux bluewards of Lyman-$\alpha$ that is redshifted to $z\approx13$ and $z\approx11$. Lower redshift interlopers such as dusty quiescent galaxies with strong Balmer breaks would be comfortably detected at $>5\sigma$ in multiple bands where instead we find no flux. From SED modeling we infer that these galaxies have already built up $10^9$ solar masses in stars over the $łesssim300-400$ Myrs after the Big Bang. The brightness of these sources enable morphological constraints. Tantalizingly, GLASS-z11 shows a clearly extended exponential light profile, potentially consistent with a disk galaxy of $r_50\approx0.7$ kpc. These sources, if confirmed, join GNz11 in defying number density forecasts for luminous galaxies based on Schechter UV luminosity functions, which require a survey area $>10\times$ larger than we have studied here to find such luminous sources at such high redshifts. They extend evidence from lower redshifts for little or no evolution in the bright end of the UV luminosity function into the cosmic dawn epoch, with implications for just how early these galaxies began forming. This, in turn, suggests that future deep $JWST$ observations may identify relatively bright galaxies to much earlier epochs than might have been anticipated.

@misc{naidu2022remarkably, abstract = {The first few hundred Myrs at $z>10$ mark the last major uncharted epoch in the history of the Universe, where only a single galaxy (GNz11 at $z\approx11$) is currently spectroscopically confirmed. Here we present a search for luminous $z>10$ galaxies with $JWST$/NIRCam photometry spanning $\approx1-5\mu$m and covering 49 arcmin$^{2}$ from the public $JWST$ Early Release Science programs (CEERS and GLASS). Our most secure candidates are two $M_{\rm{UV}}\approx-21$ systems: GLASS-z13 and GLASS-z11. These galaxies display abrupt $\gtrsim2.5$ mag breaks in their spectral energy distributions, consistent with complete absorption of flux bluewards of Lyman-$\alpha$ that is redshifted to $z\approx13$ and $z\approx11$. Lower redshift interlopers such as dusty quiescent galaxies with strong Balmer breaks would be comfortably detected at $>5\sigma$ in multiple bands where instead we find no flux. From SED modeling we infer that these galaxies have already built up $\sim 10^9$ solar masses in stars over the $\lesssim300-400$ Myrs after the Big Bang. The brightness of these sources enable morphological constraints. Tantalizingly, GLASS-z11 shows a clearly extended exponential light profile, potentially consistent with a disk galaxy of $r_{\rm{50}}\approx0.7$ kpc. These sources, if confirmed, join GNz11 in defying number density forecasts for luminous galaxies based on Schechter UV luminosity functions, which require a survey area $>10\times$ larger than we have studied here to find such luminous sources at such high redshifts. They extend evidence from lower redshifts for little or no evolution in the bright end of the UV luminosity function into the cosmic dawn epoch, with implications for just how early these galaxies began forming. This, in turn, suggests that future deep $JWST$ observations may identify relatively bright galaxies to much earlier epochs than might have been anticipated.}, added-at = {2022-07-20T09:28:46.000+0200}, author = {Naidu, Rohan P. and Oesch, Pascal A. and van Dokkum, Pieter and Nelson, Erica J. and Suess, Katherine A. and Whitaker, Katherine E. and Allen, Natalie and Bezanson, Rachel and Bouwens, Rychard and Brammer, Gabriel and Conroy, Charlie and Illingworth, Garth and Labbe, Ivo and Leja, Joel and Leonova, Ecaterina and Matthee, Jorryt and Price, Sedona H. and Setton, David J. and Strait, Victoria and Stefanon, Mauro and Tacchella, Sandro and Toft, Sune and Weaver, John R. and Weibel, Andrea}, biburl = {https://www.bibsonomy.org/bibtex/2a6d7e22e44982dee18fa555f7d694014/gpkulkarni}, description = {Two Remarkably Luminous Galaxy Candidates at $z\approx11-13$ Revealed by JWST}, interhash = {9854d58952f3654bb6073b1f07bcb3ea}, intrahash = {a6d7e22e44982dee18fa555f7d694014}, keywords = {library}, note = {cite arxiv:2207.09434Comment: Submitted to ApJL. Figs. 1 and 2 summarize the candidates, Fig. 3 places the brightness of these systems in context, Fig. 4 shows the morphology, Fig. 5 explores implications for the UVLF. Comments warmly welcomed}, timestamp = {2022-07-20T09:28:46.000+0200}, title = {Two Remarkably Luminous Galaxy Candidates at $z\approx11-13$ Revealed by JWST}, url = {http://arxiv.org/abs/2207.09434}, year = 2022 }