RELICS: A Candidate z ∼ 10 Galaxy Strongly Lensed into a Spatially Resolved Arc

Salmon, Brett; Coe, Dan; Bradley, Larry; Bradač, Maruša; Strait, Victoria; Paterno-Mahler, Rachel; Huang, Kuang-Han; Oesch, Pascal; Zitrin, Adi; Acebrón, Ana; Cibirka, Nathália; Kikuchihara, Shotaro; Oguri, Masamune; Brammer, Gabriel; Sharon, Keren; Trenti, Michele; Avila, Roberto J.; Ogaz, Sara; Andrade-Santos, Felipe; Carrasco, Daniela; Cerny, Catherine; Dawson, William A.; Frye, Brenda; Hoag, Austin; Jones, C.; Mainali, Ramesh; Ouchi, Masami; Rodney, S.; Stark, Daniel P.; Umetsu, Keiichi

doi:10.3847/2041-8213/aadc10

Cited by 75 publications

(61 citation statements)

References 52 publications

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“…These are used to avoid biased selection of low-redshift galaxies at higher redshifts of z ∼ 3-6. However, the study of galaxy properties at z > 6 is constrained by the lack of observations, and Salmon et al (2018) provide an argument of how priors are not well-studied for higher redshift galaxies, and when added tend to give lowerredshift solutions. Therefore we prefer to assume a flat luminosity prior.…”

Section: Eazymentioning

confidence: 99%

Probing the Bright End of the Rest-frame Ultraviolet Luminosity Function at z = 8–10 with Hubble Pure-parallel Imaging

Rojas-Ruiz

Finkelstein

Bagley

et al. 2020

ApJ

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Looking for bright galaxies born in the early universe is fundamental to investigating the Epoch of Reionization, the era when the first stars and galaxies ionized the intergalactic medium. We utilize Hubble Space Telescope pure parallel imaging to select galaxy candidates at a time 500 to 650 million years after the Big Bang, which corresponds to redshifts z ∼ 8−10. These data come from the Brightest of Reionizing Galaxies Survey (BoRG) Cycle 22 dataset, which consists of pure-parallel imaging in ∼ 90 different lines of sight that sum up to an area of ∼ 420 arcmin 2 . This survey uses five filters and has the advantage (compared to the Cycle 21 BoRG program) of including imaging in the JH 140 band, covering continuous wavelengths from the visible to near-infrared (λ = 0.35µm -1.7µm). This allows us to perform reliable selection of galaxies at z ≥ 8 using the photometric redshift technique. We use these galaxy candidates to constrain the bright end of the rest-frame ultraviolet luminosity function in this epoch. These candidates are excellent targets for follow-up observations, particularly with the James Webb Space Telescope.

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Section: Eazymentioning

confidence: 99%

Probing the Bright End of the Rest-frame Ultraviolet Luminosity Function at z = 8–10 with Hubble Pure-parallel Imaging

Rojas-Ruiz

Finkelstein

Bagley

et al. 2020

ApJ

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show abstract

“…Finkelstein et al 2015;McLure et al 2013) with tens at z > 8.5 (e.g. Kawamata et al 2018;Salmon et al 2018;McLeod et al 2016). These samples have allowed increasingly precise measurements of the rest-frame UV luminosity function (LF) back to ∼ 500 Myrs after the Big Bang (e.g.…”

Section: Introductionmentioning

confidence: 99%

A lack of evolution in the very bright end of the galaxy luminosity function from z ≃ 8 to 10

Bowler

Jarvis

Dunlop

et al. 2020

Monthly Notices of the Royal Astronomical Society

206

227

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We utilize deep near-infrared survey data from the UltraVISTA fourth data release (DR4) and the VIDEO survey, in combination with overlapping optical and Spitzer data, to search for bright star-forming galaxies at z 7.5. Using a full photometric redshift fitting analysis applied to the ∼ 6 deg 2 of imaging searched, we find 27 Lyman-break galaxies (LBGs), including 20 new sources, with best-fitting photometric redshifts in the range 7.4 < z < 9.1. From this sample we derive the rest-frame UV luminosity function (LF) at z = 8 and z = 9 out to extremely bright UV magnitudes (M UV −23) for the first time. We find an excess in the number density of bright galaxies in comparison to the typically assumed Schechter functional form derived from fainter samples. Combined with previous studies at lower redshift, our results show that there is little evolution in the number density of very bright (M UV ∼ −23) LBGs between z 5 and z 9. The tentative detection of an LBG with best-fit photometric redshift of z = 10.9 ± 1.0 in our data is consistent with the derived evolution. We show that a double power-law fit with a brightening characteristic magnitude (∆M * /∆z −0.5) and a steadily steepening bright-end slope (∆β/∆z −0.5) provides a good description of the z > 5 data over a wide range in absolute UV magnitude (−23 < M UV < −17). We postulate that the observed evolution can be explained by a lack of mass quenching at very high redshifts in combination with increasing dust obscuration within the first ∼ 1 Gyr of galaxy evolution.

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“…Although several surveys have harnessed the lensing power of foreground clusters, such as the Cluster Lensing And Supernova survey with Hubble (CLASH ; Postman et al 2012), the Hubble Frontier Fields (Lotz et al 2017) and most recently REionization LensIng Cluster Survey (RELICS ; Coe et al 2019), the effective surface area explored for the most highlymagnified background sources remains small. As a consequence, very few high-redshift sources ( ≥6) with magnifications ≥10 have so far been found (e.g., Coe et al 2013, Salmon et al 2018.…”

Section: Introductionmentioning

confidence: 99%

ALMA Lensing Cluster Survey: a strongly lensed multiply imaged dusty system at z ≥ 6

Laporte

Zitrin

Ellis

et al. 2021

Monthly Notices of the Royal Astronomical Society

Self Cite

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We report the discovery of an intrinsically faint, quintuply-imaged, dusty galaxy MACS0600-z6 at a redshift z =6.07 viewed through the cluster MACSJ0600.1-2008 (z=0.46). A ≃ 4σ dust detection is seen at 1.2mm as part of the ALMA Lensing Cluster Survey (ALCS), an on-going ALMA Large program, and the redshift is secured via [C II] 158 μm emission described in a companion paper. In addition, spectroscopic follow-up with GMOS/Gemini-North shows a break in the galaxy’s spectrum, consistent with the Lyman break at that redshift. We use a detailed mass model of the cluster and infer a magnification μ ≳30 for the most magnified image of this galaxy, which provides an unprecedented opportunity to probe the physical properties of a sub-luminous galaxy at the end of cosmic reionisation. Based on the spectral energy distribution, we infer lensing-corrected stellar and dust masses of $\rm {2.9^{+11.5}_{-2.3}\times 10^9}$ and $\rm {4.8^{+4.5}_{-3.4}\times 10^6}$ $\rm {M_{\odot }}$ respectively, a star formation rate of $\rm {9.7^{+22.0}_{-6.6} M_{\odot } yr^{-1}}$, an intrinsic size of $\rm {0.54^{+0.26}_{-0.14}}$ kpc, and a luminosity-weighted age of 200±100 Myr. Strikingly, the dust production rate in this relatively young galaxy appears to be larger than that observed for equivalent, lower redshift sources. We discuss if this implies that early supernovae are more efficient dust producers and the consequences for using dust mass as a probe of earlier star formation.

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RELICS: A Candidate z ∼ 10 Galaxy Strongly Lensed into a Spatially Resolved Arc

Cited by 75 publications

References 52 publications

Probing the Bright End of the Rest-frame Ultraviolet Luminosity Function at z = 8–10 with Hubble Pure-parallel Imaging

Probing the Bright End of the Rest-frame Ultraviolet Luminosity Function at z = 8–10 with Hubble Pure-parallel Imaging

A lack of evolution in the very bright end of the galaxy luminosity function from z ≃ 8 to 10

ALMA Lensing Cluster Survey: a strongly lensed multiply imaged dusty system at z ≥ 6

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