Readme update

README.rst

@@ -4,7 +4,15 @@ PeleMP: Multiphysics solver for the Pele code suite
 |AMReX Badge|
 |Exascale Computing Project Badge|
 
-`PeleMP` is the multiphysics code extension for `PeleC`, `PeleLM`, and `PeleLMeX`. Currently provides models for sprays and soot.
+`PeleMP` was the multiphysics code extension for `PeleC`, `PeleLM`, and `PeleLMeX`. It provided models for sprays and soot.
+
+WARNING
+-------
+
+The physics modules and documentation of PeleMP have been moved to
+`PelePhysics <https://github.com/AMReX-Combustion/PelePhysics>`_,
+and this repository is now archived. Further development is continuing
+within PelePhysics. The test cases have moved to the PeleC and PeleLMeX repositorties.
 
 Getting Started
 ~~~~~~~~~~~~~~~
@@ -23,6 +31,20 @@ Detailed instructions are provided in the `Documentation <https://amrex-combusti
      export PELEMP_HOME=<path_to_PeleMP>
      git clone https://github.com/AMReX-Combustion/PeleMP.git ${PELEMP_HOME}
 
+Citation
+~~~~~~~~
+
+To cite the Soot and Spray capabilities from PeleMP, please use the following `Journal of Fluids Engineering article <https://doi.org/10.1115/1.4064494>`_: ::
+
+  @article{owen2023pelemp,
+    title={PeleMP: The Multiphysics Solver for the Combustion Pele Adaptive Mesh Refinement Code Suite},
+    author={Owen, Landon D and Ge, Wenjun and Rieth, Martin and Arienti, Marco and Esclapez, Lucas and S Soriano, Bruno and Mueller, Michael E and Day, Marc and Sankaran, Ramanan and Chen, Jacqueline H},
+    journal={Journal of Fluids Engineering},
+    pages={1--41},
+    year={2023}
+  }
+
+
 Dependencies
 ~~~~~~~~~~~~