transformers safetensors llama text-generation llama-2 astronomy astrophysics arxiv en arxiv:2401.01916 arxiv:2407.11194 base_model:meta-llama/Llama-2-7b-hf base_model:finetune:meta-llama/Llama-2-7b-hf license:mit autotrain_compatible text-generation-inference region:us