485 citations · 2.9k across the 135 of their papers we have counts for
17 papers · 1 filter
JWST UNCOVER: Extremely red and compact object at triply imaged by Abell 2744
Lukas J. Furtak, Adi Zitrin, Adèle Plat +29
Recent JWST/NIRCam imaging taken for the ultra-deep UNCOVER program reveals a very red dropout object at , triply imaged by the galaxy cluster Abell 274…
UNCOVERing the extended strong lensing structures of Abell 2744 with the deepest JWST imaging
Lukas J. Furtak, Adi Zitrin, John R. Weaver +18
We present a new parametric lens model for the massive galaxy cluster Abell~2744 based on the new ultra-deep JWST imaging taken in the framework of the UNCOVER program. These obser…
The JWST UNCOVER Treasury survey: Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization
Rachel Bezanson, Ivo Labbe, Katherine E. Whitaker +40
In this paper we describe the survey design for the Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization (UNCOVER) Cycle 1 \JWST Treasury program, which execu…
Two lensed star candidates at behind the galaxy cluster MACS J0647.7+7015
Ashish Kumar Meena, Adi Zitrin, Yolanda Jiménez-Teja +24
We report the discovery of two extremely magnified lensed star candidates behind the galaxy cluster MACS J0647.7+7015, in recent multi-band James Webb Space Telescope (JWST) NIRCam…
JWST/NIRCam Probes Young Star Clusters in the Reionization Era Sunrise Arc
E. Vanzella, A. Claeyssens, B. Welch +27
Star cluster formation in the early universe and their contribution to reionization remains to date largely unconstrained. Here we present JWST/NIRCam imaging of the most highly ma…
The nature of an ultra-faint galaxy in the cosmic Dark Ages seen with JWST
Guido Roberts-Borsani, Tommaso Treu, Wenlei Chen +44
In the first billion years after the Big Bang, sources of ultraviolet (UV) photons are believed to have ionized intergalactic hydrogen, rendering the Universe transparent to UV rad…
JWST reveals a possible galaxy merger in triply-lensed MACS0647JD
Tiger Yu-Yang Hsiao, Dan Coe, Abdurro'uf +63
MACS0647JD is a triply-lensed galaxy originally discovered with the Hubble Space Telescope. Here we report new JWST imaging, which clearly resolves MACS0647JD as ha…
High-Redshift Galaxy Candidates at as Revealed by JWST Observations of WHL0137-08
Larry D. Bradley, Dan Coe, Gabriel Brammer +25
We report the discovery of four galaxy candidates observed 450 - 600 Myr after the Big Bang with photometric redshifts between z ~ 8.3 - 10.2 measured using the JWST NIRCam imaging…
JWST's PEARLS: Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results
Rogier A. Windhorst, Seth H. Cohen, Rolf A. Jansen +82
We give an overview and describe the rationale, methods, and first results from NIRCam images of the JWST "Prime Extragalactic Areas for Reionization and Lensing Science" ("PEARLS"…
Webb's PEARLS: Bright 1.5--2.0 micron Dropouts in the Spitzer/IRAC Dark Field
Haojing Yan, Seth H. Cohen, Rogier A. Windhorst +35
Using the first epoch of four-band NIRCam observations obtained by the James Webb Space Telescope (JWST) Prime Extragalactic Areas for Reionization and Lensing Science Program in t…
Constraining the physical properties of the first lensed galaxy candidates with JWST
Lukas J. Furtak, Marko Shuntov, Hakim Atek +4
The first deep-field observations of the JWST have immediately yielded a surprisingly large number of very high redshift candidates, pushing the frontier of observability well beyo…
A lensed protocluster candidate at identified in JWST observations of the galaxy cluster SMACS0723-7327
N. Laporte, A. Zitrin, H. Dole +3
According to the current paradigm of galaxy formation, the first galaxies have been likely formed within large dark matter haloes. The fragmentation of these massive haloes led to…
HST strong-lensing model for the first JWST galaxy cluster SMACS J0723.3-7327
Miriam Golubchik, Lukas J. Furtak, Ashish K. Meena +1
On 2022 July 8, NASA shared the list of five public showcase targets which have been observed with the new \textit{James Webb Space Telescope} (JWST), and whose data are expe…
Revealing Galaxy Candidates out to with JWST Observations of the Lensing Cluster SMACS0723
Hakim Atek, Marko Shuntov, Lukas J. Furtak +8
One of the main goals of the JWST is to study the first galaxies in the Universe. We present a systematic photometric analysis of very distant galaxies in the first JWST deep field…
Unscrambling the lensed galaxies in JWST images behind SMACS0723
Massimo Pascale, Brenda L. Frye, Jose Diego +16
The first deep field images from the James Webb Space Telescope (JWST) of the galaxy cluster SMACS~J0723.3-7327 reveal a wealth of new lensed images at uncharted infrared wavelengt…
A double-peaked Lyman- emitter with a strong blue peak multiply imaged by the galaxy cluster RXC J0018.5+1626
Lukas J. Furtak, Adèle Plat, Adi Zitrin +10
We report the discovery of a double-peaked Lyman- (Ly) emitter (LAE) at in VLT/MUSE data. The galaxy is strongly lensed by the galaxy cluster RXC~J0018.5+…
The Star Formation Burstiness and Ionizing Efficiency of Low-mass Galaxies
Hakim Atek, Lukas Furtak, Pascal Oesch +5
We investigate the burstiness of star formation and the ionizing efficiency of a large sample of galaxies at using HST grism spectroscopy and deep ultraviolet (UV)…