Author

E. Egami

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Review Aug 2026

Progress of the concept study of GREX-PLUS: Galaxy Reionization Explorer and Planetary Universe Spectrometer

GREX-PLUS (Galaxy Reionization EXplorer and PLanetary Universe Spectrometer) is an ISAS/JAXA Strategic L-class mission candidate for the 2030s. The 1.0 m primary mirror, 50 K cryogenic telescope will have a wide-field camera (WFC) with a 0.5 square degree field-of-view in the 2–8 μm wavelength band. An optional high-re...

A. Inoue, I. Yamamura, Toyoaki Suzuki et al. · Astronomical Telescopes + In... · 2 citations

Preprint Sep 2026

An Archival Calibration of JWST/MIRI Prism Wide-Field Slitless Spectroscopy: Methodology, Performance, and a Mid-Infrared Spectral Atlas of Galaxies at $z=0-4$ in the GOODS-N/S Fields

Through the Low Resolution Spectroscopy (LRS) observing mode of JWST/MIRI, the P750L prism disperses the entire ~70"$\times$110"imager field, turning MIRI into a wide-field slitless spectrograph (WFSS) at 5-14 $\mu$m with spectral resolution $R\sim100$. Using archival MIRI LRS data taken in the GOODS-N/S deep fields an...

Feng-Wu Sun, J. Álvarez-Márquez, E. Egami et al. · 0 citations

Review Sep 2026

SN Helios: A Multiply Imaged Type II Supernova Opening Time-Delay Cosmography beyond redshift of 3

We report the discovery and spectroscopic confirmation of SN Helios, a strongly lensed, multiply imaged Type II supernova (SN) at $z=3.34$ behind the galaxy cluster RXC J0018.5+1626. The transient was identified as a red F150W-dropout source (F277W = 26.1 mag) in JWST/NIRCam imaging taken on 2026 July 3 for the VENUS s...

S. Fujimoto, C. Larison, J. Pierel et al. · 0 citations

Open access Oct 2026

A new era for supernova science with the James Webb Space Telescope

Supernovae (SNe) are excellent probes of the physical, chemical, and cosmological context of galaxies across the history of the Universe. The James Webb Space Telescope (JWST) has a truly unique combination of wavelength, sensitivity, and resolution, providing a new window into SN physics, progenitors, dust production,...

J. Pierel, D. Coulter, C. Decoursey et al. · The European Physical Journa... · 0 citations

Preprint Jul 2026

PhotoIFU: NIRCam as a Photometric Integral Field Unit for Mapping Feedback in Galaxies

We present PhotoIFU, a workflow that uses deep multi-band imaging as a low-resolution photometric integral field unit. Applied to PSF-matched JWST/NIRCam imaging, PhotoIFU treats each spatial pixel as a coarse SED element and fits the pixel SEDs with Prospector to map resolved stellar-population and ISM-related propert...

Yong-Da Zhu, M. Rieke, Courtney Carreira et al. · 0 citations