JWST's GLIMPSE: an overview of the deepest probe of early galaxy formation and cosmic reionization
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| Natura: | Preprint |
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2025
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| author | Atek, Hakim Chisholm, John Kokorev, Vasily Endsley, Ryan Pan, Richard Furtak, Lukas Chemerynska, Iryna Richard, Johan Claeyssens, Adélaïde Oesch, Pascal Fujimoto, Seiji Naidu, Rohan Korber, Damien Schaerer, Daniel Blaizot, Jeremy Rosdahl, Joki Adamo, Angela Asada, Yoshihisa Basu, Arghyadeep Beauchesne, Benjamin Berg, Danielle Bezanson, Rachel Bouwens, Rychard Brammer, Gabriel Dessauges-Zavadsky, Miroslava Ellien, Amaël Ezziati, Meriam Fei, Qinyue Goovaerts, Ilias Heurtier, Sylvain Hsiao, Tiger Yu-Yang Jecmen, Michelle Khullar, Gourav Kneib, Jean-Paul Labbé, Ivo Leclercq, Floriane Marques-Chaves, Rui Mason, Charlotte McQuinn, Kristen B. W. Muñoz, Julian B. Natarajan, Priyamvada Saldana-Lopez, Alberto Stephenson, Mabel G. Trebitsch, Maxime Volonteri, Marta Weibel, Andrea Zitrin, Adi |
| author_facet | Atek, Hakim Chisholm, John Kokorev, Vasily Endsley, Ryan Pan, Richard Furtak, Lukas Chemerynska, Iryna Richard, Johan Claeyssens, Adélaïde Oesch, Pascal Fujimoto, Seiji Naidu, Rohan Korber, Damien Schaerer, Daniel Blaizot, Jeremy Rosdahl, Joki Adamo, Angela Asada, Yoshihisa Basu, Arghyadeep Beauchesne, Benjamin Berg, Danielle Bezanson, Rachel Bouwens, Rychard Brammer, Gabriel Dessauges-Zavadsky, Miroslava Ellien, Amaël Ezziati, Meriam Fei, Qinyue Goovaerts, Ilias Heurtier, Sylvain Hsiao, Tiger Yu-Yang Jecmen, Michelle Khullar, Gourav Kneib, Jean-Paul Labbé, Ivo Leclercq, Floriane Marques-Chaves, Rui Mason, Charlotte McQuinn, Kristen B. W. Muñoz, Julian B. Natarajan, Priyamvada Saldana-Lopez, Alberto Stephenson, Mabel G. Trebitsch, Maxime Volonteri, Marta Weibel, Andrea Zitrin, Adi |
| contents | We present an overview of the JWST GLIMPSE program, highlighting its survey design, primary science goals, gravitational lensing models, and first results. GLIMPSE provides ultra-deep JWST/NIRCam imaging across seven broadband filters (F090W, F115W, F200W, F277W, F356W, F444W) and two medium-band filters (F410M, F480M), with exposure times ranging from 20 to 40 hours per filter. This yields a 5$σ$ limiting magnitude of 30.9 AB (measured in a 0.2 arcsec diameter aperture). The field is supported by extensive ancillary data, including deep HST imaging from the Hubble Frontier Fields program, VLT/MUSE spectroscopy, and deep JWST/NIRSpec medium-resolution multi-object spectroscopy. Exploiting the strong gravitational lensing of the galaxy cluster Abell S1063, GLIMPSE probes intrinsic depths beyond 33 AB magnitudes and covers an effective source-plane area of approximately 4.4 arcmin$^2$ at $z \sim 6$. The program's central aim is to constrain the abundance of the faintest galaxies from $z \sim 6$ up to the highest redshifts, providing crucial benchmarks for galaxy formation models, which have so far been tested primarily on relatively bright systems. We present an initial sample of $\sim 540$ galaxy candidates identified at $6 < z < 16$, with intrinsic UV magnitudes spanning $M_{\mathrm UV}$ = $-$20 to $-$12. This enables unprecedented constraints on the extreme faint end of the UV luminosity function at these epochs. In addition, GLIMPSE opens new windows for spatially resolved studies of star clusters in early galaxies and the detection and characterization of faint high-$z$ active galactic nuclei. This paper accompanies the first public data release, which includes reduced JWST and HST mosaics, photometric catalogs, and gravitational lensing models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_07542 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | JWST's GLIMPSE: an overview of the deepest probe of early galaxy formation and cosmic reionization Atek, Hakim Chisholm, John Kokorev, Vasily Endsley, Ryan Pan, Richard Furtak, Lukas Chemerynska, Iryna Richard, Johan Claeyssens, Adélaïde Oesch, Pascal Fujimoto, Seiji Naidu, Rohan Korber, Damien Schaerer, Daniel Blaizot, Jeremy Rosdahl, Joki Adamo, Angela Asada, Yoshihisa Basu, Arghyadeep Beauchesne, Benjamin Berg, Danielle Bezanson, Rachel Bouwens, Rychard Brammer, Gabriel Dessauges-Zavadsky, Miroslava Ellien, Amaël Ezziati, Meriam Fei, Qinyue Goovaerts, Ilias Heurtier, Sylvain Hsiao, Tiger Yu-Yang Jecmen, Michelle Khullar, Gourav Kneib, Jean-Paul Labbé, Ivo Leclercq, Floriane Marques-Chaves, Rui Mason, Charlotte McQuinn, Kristen B. W. Muñoz, Julian B. Natarajan, Priyamvada Saldana-Lopez, Alberto Stephenson, Mabel G. Trebitsch, Maxime Volonteri, Marta Weibel, Andrea Zitrin, Adi Astrophysics of Galaxies We present an overview of the JWST GLIMPSE program, highlighting its survey design, primary science goals, gravitational lensing models, and first results. GLIMPSE provides ultra-deep JWST/NIRCam imaging across seven broadband filters (F090W, F115W, F200W, F277W, F356W, F444W) and two medium-band filters (F410M, F480M), with exposure times ranging from 20 to 40 hours per filter. This yields a 5$σ$ limiting magnitude of 30.9 AB (measured in a 0.2 arcsec diameter aperture). The field is supported by extensive ancillary data, including deep HST imaging from the Hubble Frontier Fields program, VLT/MUSE spectroscopy, and deep JWST/NIRSpec medium-resolution multi-object spectroscopy. Exploiting the strong gravitational lensing of the galaxy cluster Abell S1063, GLIMPSE probes intrinsic depths beyond 33 AB magnitudes and covers an effective source-plane area of approximately 4.4 arcmin$^2$ at $z \sim 6$. The program's central aim is to constrain the abundance of the faintest galaxies from $z \sim 6$ up to the highest redshifts, providing crucial benchmarks for galaxy formation models, which have so far been tested primarily on relatively bright systems. We present an initial sample of $\sim 540$ galaxy candidates identified at $6 < z < 16$, with intrinsic UV magnitudes spanning $M_{\mathrm UV}$ = $-$20 to $-$12. This enables unprecedented constraints on the extreme faint end of the UV luminosity function at these epochs. In addition, GLIMPSE opens new windows for spatially resolved studies of star clusters in early galaxies and the detection and characterization of faint high-$z$ active galactic nuclei. This paper accompanies the first public data release, which includes reduced JWST and HST mosaics, photometric catalogs, and gravitational lensing models. |
| title | JWST's GLIMPSE: an overview of the deepest probe of early galaxy formation and cosmic reionization |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2511.07542 |