Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview
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2025
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| author | Malkan, Matthew A. Mehta, Vihang Acharyya, Ayan Akins, Hollis Alavi, Anahita Atek, Hakim Baronchelli, Ivano Battisti, Andrew J. Boyett, Kit Bradac, Marusa Bruton, Sean Tyler Bunker, Andrew Burgasser, Adam J. Casey, Caitlin Chen, Nuo Colbert, James Dai, Y. Sophia Franco, Max Hannahs, Clea Harish, Santosh Hasan, Farhanul Hayes, Matthew James Henry, Alaina L. Huberty, Mason Kartaltepe, Jeyhan Kim, Keunho J. Leethochawalit, Nicha Levine, Jacob Li, Sijia Lin, Yu-Heng Liu, Yiaxiao Mason, Charlotte Masters, Daniel McCracken, Henry Morishita, Takahiro Nedkova, Kalina Rafelski, Marc Raj, Vivasvaan Aditya Roberts-Borsani, Guido Runnholm, Axel Rutkowski, Michael James Saldana-Lopez, Alberto Scarlata, Zahra Sattari Claudia Schmidt, Kasper Borello Shuntov, Marko Teplitz, Harry Trenti, Michele Treu, Tommaso Vulcani, Benedetta Watson, Peter J. Wang, Xin Zhuang, Zhuyun |
| author_facet | Malkan, Matthew A. Mehta, Vihang Acharyya, Ayan Akins, Hollis Alavi, Anahita Atek, Hakim Baronchelli, Ivano Battisti, Andrew J. Boyett, Kit Bradac, Marusa Bruton, Sean Tyler Bunker, Andrew Burgasser, Adam J. Casey, Caitlin Chen, Nuo Colbert, James Dai, Y. Sophia Franco, Max Hannahs, Clea Harish, Santosh Hasan, Farhanul Hayes, Matthew James Henry, Alaina L. Huberty, Mason Kartaltepe, Jeyhan Kim, Keunho J. Leethochawalit, Nicha Levine, Jacob Li, Sijia Lin, Yu-Heng Liu, Yiaxiao Mason, Charlotte Masters, Daniel McCracken, Henry Morishita, Takahiro Nedkova, Kalina Rafelski, Marc Raj, Vivasvaan Aditya Roberts-Borsani, Guido Runnholm, Axel Rutkowski, Michael James Saldana-Lopez, Alberto Scarlata, Zahra Sattari Claudia Schmidt, Kasper Borello Shuntov, Marko Teplitz, Harry Trenti, Michele Treu, Tommaso Vulcani, Benedetta Watson, Peter J. Wang, Xin Zhuang, Zhuyun |
| contents | During the second half of Cycle 1 of the James Webb Space Telescope (JWST), we conducted the Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE) program. PASSAGE received the largest allocation of JWST observing time in Cycle 1, 591 hours of NIRISS observations to obtain direct near-IR imaging and slitless spectroscopy. About two thirds of these were ultimately executed, to observe 63 high-latitude fields in Pure Parallel mode. These have provided more than ten thousand near-infrared grism spectrograms of faint galaxies.
PASSAGE brings unique advantages in studying galaxy evolution: A) Unbiased spectroscopic search, without prior photometric pre-selection. By including the most numerous galaxies, with low masses and strong emission lines, slitless spectroscopy is the indispensable complement to any pre-targeted spectroscopy; B) The combination of several dozen independent fields to overcome cosmic variance; C) Near-infrared spectral coverage, often spanning the full range from 1.0--2.3 $μ$m, with minimal wavelength gaps, to measure multiple diagnostic rest-frame optical lines, minimizing sensitivity to dust reddening; D) JWST's unprecedented spatial resolution, in some cases using two orthogonal grism orientations, to overcome contamination due to blending of overlapping spectra; E) Discovery of rare bright objects especially for detailed JWST followup. PASSAGE data are public immediately, and our team plans to deliver fully-processed high-level data products.
In this PASSAGE overview, we describe the survey and data quality, and present examples of these accomplishments in several areas of current interest in the evolution of emission-line galaxy properties, particularly at low masses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_00596 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview Malkan, Matthew A. Mehta, Vihang Acharyya, Ayan Akins, Hollis Alavi, Anahita Atek, Hakim Baronchelli, Ivano Battisti, Andrew J. Boyett, Kit Bradac, Marusa Bruton, Sean Tyler Bunker, Andrew Burgasser, Adam J. Casey, Caitlin Chen, Nuo Colbert, James Dai, Y. Sophia Franco, Max Hannahs, Clea Harish, Santosh Hasan, Farhanul Hayes, Matthew James Henry, Alaina L. Huberty, Mason Kartaltepe, Jeyhan Kim, Keunho J. Leethochawalit, Nicha Levine, Jacob Li, Sijia Lin, Yu-Heng Liu, Yiaxiao Mason, Charlotte Masters, Daniel McCracken, Henry Morishita, Takahiro Nedkova, Kalina Rafelski, Marc Raj, Vivasvaan Aditya Roberts-Borsani, Guido Runnholm, Axel Rutkowski, Michael James Saldana-Lopez, Alberto Scarlata, Zahra Sattari Claudia Schmidt, Kasper Borello Shuntov, Marko Teplitz, Harry Trenti, Michele Treu, Tommaso Vulcani, Benedetta Watson, Peter J. Wang, Xin Zhuang, Zhuyun Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics During the second half of Cycle 1 of the James Webb Space Telescope (JWST), we conducted the Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE) program. PASSAGE received the largest allocation of JWST observing time in Cycle 1, 591 hours of NIRISS observations to obtain direct near-IR imaging and slitless spectroscopy. About two thirds of these were ultimately executed, to observe 63 high-latitude fields in Pure Parallel mode. These have provided more than ten thousand near-infrared grism spectrograms of faint galaxies. PASSAGE brings unique advantages in studying galaxy evolution: A) Unbiased spectroscopic search, without prior photometric pre-selection. By including the most numerous galaxies, with low masses and strong emission lines, slitless spectroscopy is the indispensable complement to any pre-targeted spectroscopy; B) The combination of several dozen independent fields to overcome cosmic variance; C) Near-infrared spectral coverage, often spanning the full range from 1.0--2.3 $μ$m, with minimal wavelength gaps, to measure multiple diagnostic rest-frame optical lines, minimizing sensitivity to dust reddening; D) JWST's unprecedented spatial resolution, in some cases using two orthogonal grism orientations, to overcome contamination due to blending of overlapping spectra; E) Discovery of rare bright objects especially for detailed JWST followup. PASSAGE data are public immediately, and our team plans to deliver fully-processed high-level data products. In this PASSAGE overview, we describe the survey and data quality, and present examples of these accomplishments in several areas of current interest in the evolution of emission-line galaxy properties, particularly at low masses. |
| title | Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2509.00596 |