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tags:
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- astronomy
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- multimodal
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- classification
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# AstroM3-CLIP
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AstroM³ is a self-supervised multimodal model for astronomy that integrates time-series photometry, spectra, and metadata into a unified embedding space
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for classification and other downstream tasks. AstroM³ is trained on [AstroM3Processed](https://huggingface.co/datasets/MeriDK/AstroM3Processed).
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For more details on the AstroM³ architecture, training, and results, please refer to the [paper](https://arxiv.org/abs/2411.08842).
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<p align="center">
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<img src="figures/architecture.png" width="100%">
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<br />
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<span>
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Figure 1: Overview of the multimodal CLIP framework adapted for astronomy, incorporating three data modalities: photometric time-series, spectra, and metadata.
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Each modality is processed by a dedicated encoder to create embeddings, which are then mapped into a shared embedding space through projection heads.
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Pairwise similarity matrices align the embeddings across modalities, and a symmetric cross-entropy loss, computed over these matrices, optimizes the model.
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The total loss, derived from all pairwise losses, guides the model’s trimodal learning.
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</span>
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</p>
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This repository provides pre-trained models based on the AstroM³ framework—a self-supervised, trimodal CLIP approach that integrates photometry, spectra, and metadata for astronomical classification. The available models are:
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AstroM3-CLIP: The base model pre-trained using the trimodal CLIP approach.
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AstroM3-CLIP-meta: Fine-tuned for metadata-only classification.
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AstroM3-CLIP-spectra: Fine-tuned for spectra-only classification.
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AstroM3-CLIP-photo: Fine-tuned for photometry-only classification.
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AstroM3-CLIP-all: Fine-tuned for multimodal (combined) classification.
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| Model Name | Description |
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|----------------------|------------------------------------------------------------------------------------|
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| AstroM3-CLIP | Base model pre-trained using the trimodal CLIP approach. |
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| AstroM3-CLIP-meta | AstroM3-CLIP fine-tuned for metadata-only classification. |
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| AstroM3-CLIP-spectra | AstroM3-CLIP fine-tuned for spectra-only classification. |
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| AstroM3-CLIP-photo | AstroM3-CLIP fine-tuned for photometry-only classification. |
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| AstroM3-CLIP-all | FAstroM3-CLIP fine-tuned for multimodal classification (combining all modalities). |
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