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Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview

by Leethochawalit, Nicha , Wang, Xin , Mehta, Vihang , Li, Sijia , Bunker, Andrew J , Rutkowski, Michael J , Bradac, Marusa , Burgasser, Adam J , Henry, Alaina L , Lin, Yu-Heng , Atek, Hakim , Saldana-Lopez, Alberto , Jones, Tucker , Levine, Jacob , Runnholm, Axel , Hayes, Matthew J , Colbert, James , Hasan, Farhanul , Mason, Charlotte , Morishita, Takahiro , Chen, Nuo , Shuntov, Marko , Zhuang, Zhuyun , Nedkova, Kalina V , Sattari, Zahra , Schmidt, Kasper Borello , Acharyya, Ayan , Bruton, Sean Tyler , Hannahs, Clea , Vulcani, Benedetta , Baronchelli, Ivano , Harish, Santosh , Dai, Y. Sophia , McCracken, Henry Joy , Roberts-Borsani, Guido , Battisti, Andrew J , Treu, Tommaso , Boyett, Kit , Kartaltepe, Jeyhan S , Malkan, Matthew A , Liu, Yixiao , Watson, Peter J , Franco, Maximilien , Teplitz, Harry , Kim, Keunho J , Casey, Caitlin M , Alavi, Anahita , Trenti, Michele , Raj, Vivasvaan Aditya , Akins, Hollis B , Huberty, Mason , Rafelski, Marc , Scarlata, Claudia , Masters, Daniel

in Emission / Emission lines / Galactic evolution / Galaxies / Infrared imaging / Infrared spectra / James Webb Space Telescope / Near infrared radiation / Space telescopes / Spatial resolution / Spectrograms / Spectroscopic analysis / Spectroscopy / Spectrum analysis / Stars & galaxies

2025

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2025

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2025

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Journal Article

Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview

Leethochawalit, Nicha,

Wang, Xin,

Mehta, Vihang,

Li, Sijia,

Bunker, Andrew J,

Rutkowski, Michael J,

Bradac, Marusa,

Burgasser, Adam J,

Henry, Alaina L,

Lin, Yu-Heng,

Atek, Hakim,

Saldana-Lopez, Alberto,

Jones, Tucker,

Levine, Jacob,

Runnholm, Axel,

Hayes, Matthew J,

Colbert, James,

Hasan, Farhanul,

Mason, Charlotte,

Morishita, Takahiro,

Chen, Nuo,

Shuntov, Marko,

Zhuang, Zhuyun,

Nedkova, Kalina V,

Sattari, Zahra,

Schmidt, Kasper Borello,

Acharyya, Ayan,

Bruton, Sean Tyler,

Hannahs, Clea,

Vulcani, Benedetta,

Baronchelli, Ivano,

Harish, Santosh,

Dai, Y. Sophia,

McCracken, Henry Joy,

Roberts-Borsani, Guido,

Battisti, Andrew J,

Treu, Tommaso,

Boyett, Kit,

Kartaltepe, Jeyhan S,

Malkan, Matthew A,

Liu, Yixiao,

Watson, Peter J,

Franco, Maximilien,

Teplitz, Harry,

Kim, Keunho J,

Casey, Caitlin M,

Alavi, Anahita,

Trenti, Michele,

Raj, Vivasvaan Aditya,

Akins, Hollis B,

Huberty, Mason,

Rafelski, Marc,

Scarlata, Claudia,

Masters, Daniel

2025

Overview

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 hr of NIRISS observations to obtain direct near-IR imaging and slitless spectroscopy. About two-thirds of this was ultimately executed, to observe 63 high-latitude fields in pure-parallel mode. These have provided more than 10,000 near-infrared grism spectrograms of faint galaxies. PASSAGE brings unique advantages in studying galaxy evolution: (a) Unbiased spectroscopic search, without prior photometric preselection. By including the typical galaxies which have low masses and strong emission lines, slitless spectroscopy is the indispensable complement to any pretargeted spectroscopy. (b) The combination of several dozen independent fields to overcome cosmic variance. (c) Near-infrared spectral coverage, spanning a wide wavelength range of up to 1.0 to 2.3 μm, 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 follow-up. 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.

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IOP Publishing

Subject

/ James Webb Space Telescope