The Astrophysical Journal Letters

The NANOGrav 15 yr Dataset: Targeted Searches for Supermassive Black Hole Binaries

Pub Date : 2026-02-05 DOI: 10.3847/2041-8213/ae3719 Nikita Agarwal, Gabriella Agazie, Akash Anumarlapudi, Anne M. Archibald, Zaven Arzoumanian, Jeremy G. Baier, Paul T. Baker, Bence Bécsy, Laura Blecha, Adam Brazier, Paul R. Brook, Sarah Burke-Spolaor, Rand Burnette, Robin Case, J. Andrew Casey-Clyde, Yu-Ting Chang, Maria Charisi, Shami Chatterjee, Tyler Cohen, Paolo Coppi, James M. Cordes, Neil J. Cornish, Fronefield Crawford, H. Thankful Cromartie, Kathryn Crowter, Megan E. DeCesar, Paul B. Demorest, Heling Deng, Lankeswar Dey, Timothy Dolch, Daniel J. D’Orazio, Ellis Eisenberg, Elizabeth C. Ferrara, Graham Doskoch, William Fiore, Emmanuel Fonseca, Gabriel E. Freedman, Emiko C. Gardiner, Nate Garver-Daniels, Peter A. Gentile, Kyle A. Gersbach, Joseph Glaser, Matthew J. Graham, Deborah C. Good, Kayhan Gültekin, C. J. Harris, Jeffrey S. Hazboun, Forrest Hutchison, Ross J. Jennings, Aaron D. Johnson, Megan L. Jones, David L. Kaplan, Luke Zoltan Kelley, Matthew Kerr, Joey S. Key, Nima Laal, Michael T. Lam, William G. Lamb, Bjorn..

Secular Evolution of PSR J2021+4026: Long-term γ-Ray Flux and Spin-down Variability beyond State Transitions

Pub Date : 2026-02-05 DOI: 10.3847/2041-8213/ae3c0f Xue-Zhi Liu, Ming-Yu Ge, Xiao-Ping Zheng, Xiao-Bo Li, Han-Long Peng, Wen-Tao Ye, Bo-Yan Chen, Shi-Jie Zheng, Fang-Jun Lu and Shuang-Nan Zhang

Water Production of Interstellar Comet 3I/ATLAS from SOHO/SWAN Observations after Perihelion

Pub Date : 2026-02-05 DOI: 10.3847/2041-8213/ae3bd8 M. R. Combi, T. Mäkinen, J. L. Bertaux, E. Quémerais, S. Ferron, R. Lallement and W. Schmidt