Integral Field Unit Spectroscopy with One Fiber
Integral field unit (IFU) spectroscopy provides spatially resolved spectra across galaxies, offering crucial insights into their evolution. However, its high observational cost limits current IFU datasets to $\sim 10^4$ objects. We present a multi-modal, probabilistic foundation model that predicts high-resolution spectra with calibrated uncertainties at arbitrary spatial locations within a galaxy directly from broadband images. Built on a masked autoencoder framework, our architecture injects fiber positional encodings and redshift aware wavelength encodings, enabling spatially conditioned predictions. Trained on 4.7 million images and single fiber spectroscopic observations from the Dar...
| Authors | Zehao Peng, Biprateep Dey, Chris J. Maddison et al. |
|---|---|
| Primary category | astro-ph.GA |
| Published | 8 June 2026 |
| Last updated at source | 8 June 2026 |
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