NOT IN OUR BACKYARD: SPECTROSCOPIC SUPPORT FOR THE CLASH<i>z</i>= 11 CANDIDATE MACS 0647-JD

Pirzkal, Nor; Coe, Dan; Frye, Brenda; Brammer, Gabriel; Moustakas, John; Rothberg, Barry; Broadhurst, T.; Bradley, Larry; Wel, Arjen van der; Kelson, Daniel D.; Donahue, M.; Zitrin, Adi; Moustakas, Leonidas A.; Barker, Elizabeth

doi:10.1088/0004-637x/804/1/11

Cited by 13 publications

(14 citation statements)

References 27 publications

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“…Given the low success rate of Lyα searches, a viable alternative approach is to search for a spectroscopic confirmation of the UV continuum spectral break (see e.g. Dow-Hygelund et al 2005;Malhotra et al 2005;Vanzella et al 2009;Rhoads et al 2013;Watson et al 2015;Pirzkal et al 2015). This break is expected owing to the near- B 435 7 ± 9 V 606 2 ± 7 i 775 5 ± 10 I 814 3 ± 7 z 850 17 ± 11 Y 105 −7 ± 9 J 125 11 ± 8 JH 140 64 ± 13 † H 160 152 ± 10 K 137 ± 67 IRAC 3.6 µm 139 ± 21 † IRAC 4.5 µm 144 ± 27 † † Note that the earlier JH 140 data in which GN-z11 was first detected was less deep and gave a flux measurement of 104±47 nJy.…”

Section: Introductionmentioning

confidence: 99%

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A Remarkably Luminous Galaxy at Z = 11.1 Measured With Hubble Space Telescope Grism Spectroscopy

Oesch

Brammer

Dokkum

et al. 2016

ApJ

499

423

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We present Hubble WFC3/IR slitless grism spectra of a remarkably bright z 10 galaxy candidate, GN-z11, identified initially from CANDELS/GOODS-N imaging data. A significant spectroscopic continuum break is detected at λ = 1.47 ± 0.01 µm. The new grism data, combined with the photometric data, rule out all plausible lower redshift solutions for this source. The only viable solution is that this continuum break is the Lyα break redshifted to z grism = 11.09 +0.08 −0.12 , just ∼400 Myr after the Big Bang. This observation extends the current spectroscopic frontier by 150 Myr to well before the Planck (instantaneous) cosmic reionization peak at z ∼ 8.8, demonstrating that galaxy build-up was well underway early in the reionization epoch at z > 10. GN-z11 is remarkably and unexpectedly luminous for a galaxy at such an early time: its UV luminosity is 3× larger than L * measured at z ∼ 6 − 8. The Spitzer IRAC detections up to 4.5 µm of this galaxy are consistent with a stellar mass of ∼ 10 9 M . This spectroscopic redshift measurement suggests that the James Webb Space Telescope (JW ST ) will be able to similarly and easily confirm such sources at z > 10 and characterize their physical properties through detailed spectroscopy. Furthermore, WFIRST, with its wide-field near-IR imaging, would find large numbers of similar galaxies and contribute greatly to JW ST 's spectroscopy, if it is launched early enough to overlap with JW ST .

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Section: Introductionmentioning

confidence: 99%

“…Several surveys have thus been undertaken or are ongoing to search for continuum breaks and very weak Lyα lines with deep WFC3/IR grism spectra (e.g. Treu et al 2015;Schmidt et al 2016;Pirzkal et al 2015).…”

Section: Introductionmentioning

confidence: 99%

A Remarkably Luminous Galaxy at Z = 11.1 Measured With Hubble Space Telescope Grism Spectroscopy

Oesch

Brammer

Dokkum

et al. 2016

ApJ

499

423

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“…Ten years ago, that record belonged to A1689-zD1 at z ∼ 7.5 (Bradley et al 2008;Watson et al 2015). More recently, the Cluster Lensing And Supernova survey with Hubble (CLASH; Postman et al 2012) yielded the triply-imaged z ∼ 10.8 candidate MACS0647-JD (Coe et al 2013;Pirzkal et al 2015;Chan et al 2016). This redshift has been surpassed only by the grism measurement of z = 11.1 for GN-z11 discovered by Oesch et al (2014) in blank-field imaging by the CANDELS program (Grogin et al 2011;Koekemoer et al 2011).…”

Section: Introductionmentioning

confidence: 99%

RELICS: Reionization Lensing Cluster Survey

Coe

Salmon

Bradač

et al. 2019

ApJ

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191

159

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Large surveys of galaxy clusters with the Hubble and Spitzer Space Telescopes, including CLASH and the Frontier Fields, have demonstrated the power of strong gravitational lensing to efficiently deliver large samples of high-redshift galaxies. We extend this strategy through a wider, shallower survey named RELICS, the Reionization Lensing Cluster Survey. This survey, described here, was designed primarily to deliver the best and brightest high-redshift candidates from the first billion years after the Big Bang. RELICS observed 41 massive galaxy clusters with Hubble and Spitzer at 0.4-1.7µm and 3.0-5.0µm, respectively. We selected 21 clusters based on Planck PSZ2 mass estimates and the other 20 based on observed or inferred lensing strength. Our 188-orbit Hubble Treasury Program obtained the first high-resolution near-infrared images of these clusters to efficiently search for lensed highredshift galaxies. We observed 46 WFC3/IR pointings (∼200 arcmin 2 ) with two orbits divided among four filters (F105W, F125W, F140W, and F160W) and ACS imaging as needed to achieve single-orbit depth in each of three filters (F435W, F606W, and F814W). As previously reported by Salmon et al., we discovered 322 z ∼ 6 − 10 candidates, including the brightest known at z ∼ 6, and the most spatially-resolved distant lensed arc known at z ∼ 10. Spitzer IRAC imaging (945 hours awarded, plus 100 archival) has crucially enabled us to distinguish z ∼ 10 candidates from z ∼ 2 interlopers. For each cluster, two HST observing epochs were staggered by about a month, enabling us to discover 11 supernovae, including 3 lensed supernovae, which we followed up with 20 orbits from our program. We delivered reduced HST images and catalogs of all clusters to the public via MAST and reduced Spitzer images via IRSA. We have also begun delivering lens models of all clusters, to be completed before the JWST GO Cycle 1 call for proposals.

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“…The cluster selection includes 20 X-ray selected dynamically-relaxed systems plus 5 ad-structures of Dark Matter (DM) in galaxy clusters with unprecedented precision and resolution (Zitrin et al 2011;Umetsu et al 2012;Coe et al 2012;Lemze et al 2012;Umetsu 2013;Medezinski et al 2013;Zitrin et al 2013;Eichner et al 2013;Umetsu et al 2014;Grillo et al 2014;Meneghetti et al 2014;Merten et al 2015;Zitrin et al 2015;Umetsu et al 2016; among others), 2. Detecting and characterizing some of the most distant galaxies yet discovered at z>7 (Zheng et al 2012;Bradley et al 2012;Coe et al 2013;Balestra et al 2013;Bouwens et al 2014;Monna et al 2014;Bradley et al 2014;Pirzkal et al 2015), 3. Detecting Type-Ia supernovae (SNe-Ia) out to redshift z∼2.5 to measure the time dependence of the dark energy equation of state and potential evolutionary effects in the SNe themselves (Rodney et al 2012;Jones et al 2013;Graur et al 2014;Patel et al 2014;Strolger et al 2015;Rodney et al 2016) and 4.…”

Section: Introductionmentioning

confidence: 99%

CLASH: accurate photometric redshifts with 14 HST bands in massive galaxy cluster cores

Molino

Benı́tez

Ascaso

et al. 2017

Monthly Notices of the Royal Astronomical Society

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We present accurate photometric redshifts for galaxies observed by the Cluster Lensing and Supernova survey with Hubble (CLASH). CLASH observed 25 massive galaxy cluster cores with the Hubble Space Telescope in 16 filters spanning 0.2 -1.7 µm. Photometry in such crowded fields is challenging. Compared to our previously released catalogs, we make several improvements to the photometry, including smaller apertures, ICL subtraction, PSF matching, and empirically measured uncertainties. We further improve the Bayesian Photometric Redshift (BPZ) estimates by adding a redder elliptical template and by inflating the photometric uncertainties of the brightest galaxies. The resulting photometric redshift accuracies are dz/(1+z) ∼ 0.8%, 1.0%, and 2.0% for galaxies with I-band F814W AB magnitudes < 18, 20, and 23, respectively. These results are consistent with our expectations. They improve on our previously reported accuracies by a factor of 4 at the bright end and a factor of 2 at the faint end. Our new catalog includes 1257 spectroscopic redshifts, including 382 confirmed cluster members. We also provide stellar mass estimates. Finally, we include lensing magnification estimates of background galaxies based on our public lens models. Our new catalog of all 25 CLASH clusters is available via MAST. The analysis techniques developed here will be useful in other surveys of crowded fields, including the Frontier Fields and surveys carried out with J-PAS and JWST.

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NOT IN OUR BACKYARD: SPECTROSCOPIC SUPPORT FOR THE CLASHz= 11 CANDIDATE MACS 0647-JD

Cited by 13 publications

References 27 publications

A Remarkably Luminous Galaxy at Z = 11.1 Measured With Hubble Space Telescope Grism Spectroscopy

A Remarkably Luminous Galaxy at Z = 11.1 Measured With Hubble Space Telescope Grism Spectroscopy

RELICS: Reionization Lensing Cluster Survey

CLASH: accurate photometric redshifts with 14 HST bands in massive galaxy cluster cores

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