Stars
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A decade of transit photometry for K2-19: Revised system architecture ★
Almenara, J. M., Mardling, R. A., Leleu, A., Díaz, R. F., Bonfils, X., Jiang, I. G., Yeh, L., Yang, M., Stassun, K. G., A-Thano, N., Edwards, B., Bouchy, F., Bourrier, V., Deline, A., Ehrenreich, D., Fontanet, E., Forveille, T., Jenkins, J. M., Kwok, L. K. W., Lendl, M. Read MoreDec. 19, 2025
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Calibration of binary population synthesis models using white dwarf binaries from APOGEE, GALEX, and Gaia
Rubio, A. C., Breivik, K., Badenes, C., El-Badry, K., Anguiano, B., Linck, E., Majewski, S. R., & Stassun, K. G. (2025). Calibration of binary population synthesis models using white dwarf binaries from APOGEE, GALEX, and Gaia. Astronomy and Astrophysics, 704, A6. https://doi.org/10.1051/0004-6361/202555600 This study looks at how pairs… Read MoreDec. 19, 2025
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Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267
Zúniga-Fernández, Sebastian., Pozuelos, Francisco J., Devora-Pajares, Martín., Cuello, Nicolas., Greklek-McKeon, Michael., Stassun, Keivan Guadalupe., van Grootel, Valérie., Rojas-Ayala, Bárbara., Korth, Judith., Günther, Maximilian N., Burgasser, Adam J., Hsu, Chihchun., Rackham, Benjamin V., Barkaoui, Khalid., Timmermans, Mathilde., Cadieux, Charles., Alonso, Roi., Strakhov, Ivan A., Howell, Steve B., Littlefield, Colin.,… Read MoreNov. 23, 2025
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A Galactic Interloper: A Study of the Camelopardis OB1 Association’s Clusters and Its Visitor from the Perseus Arm
Mullen, Joseph P.; Mast, Amanda; Kounkel, Marina A.; Stassun, Keivan Guadalupe; Roman-Lopes, Alexandre; Tan, Jonathan C. (2025). A Galactic Interloper: A Study of the Camelopardis OB1 Association’s Clusters and Its Visitor from the Perseus Arm. Astrophysical Journal, 992(1), 17. https://doi.org/10.3847/1538-4357/adfb7a Within the Camelopardalis OB1… Read MoreOct. 23, 2025
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Discovery of the pre-main-sequence eclipsing binary MML 48
Gómez Maqueo Chew, Yadira Gómez Maqueo; Hebb, Leslie; Stempels, Henricus C.; Walter, Frederick M.; James, David J.; Feiden, Gregory A.; Petrucci, Romina P.; Lister, Tim A.; Baraffe, Isabelle; Brodheim, Max N.; Faedi, Francesca; Anderson, David R.; Street, Rachel A.; Hellier, Coel; Stassun, Keivan Guadalupe. (2025). Discovery of… Read MoreOct. 23, 2025
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FUMES. IV. Optical and Far-ultraviolet Spectra of a Flare on the M Dwarf GJ 4334
Duvvuri, Girish M.; Pineda, John Sebastian; Garciá Soto, Aylin; Berta-Thompson, Zachory K.; Youngblood, Allison A.; France, Kevin C.; Newton, Elisabeth R.; Stassun, Keivan Guadalupe. (2025). FUMES. IV. Optical and Far-ultraviolet Spectra of a Flare on the M Dwarf GJ 4334. Astronomical Journal, 170(4), 249. https://doi.org/10.3847/1538-3881/adff74… Read MoreOct. 23, 2025
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Atmospheric parameters and chemical abundances of young stars with APOGEE – I. Orion star-forming region
López-Valdivia, Ricardo; Adame, Lucía; Román-Zúñiga, Carlos G.; Hernández, Jesus V.; Śanchez, Edilberto; Herrnández-Aburto, Itzarel; Fernández-Trincado, José G.; Zagala Lagunas, Eduardo; Carigi, Leticia; Méndez-Delgado, José Eduardo; Kounkel, Marina A.; Serna, Javier M.; Lane, Richard R.; Stassun, Keivan Guadalupe; Villanova, Sandro; Kim, Jinyoung Serena; Wolk, Scott J.; Stringfellow, Guy S.;… Read MoreOct. 23, 2025
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Three hot Jupiters transiting K-dwarfs with significant heavy element masses
Frensch, Yolanda G.C., Bouchy, François, Lo Curto, Gaspare, Ulmer-Moll, Solene, Sousa, Sérgio G., Santos, Nuno C., Stassun, Keivan Guadalupe, Watkins, Cristilyn N., Chakraborty, Hritam, & Barkaoui, Khalid. (2025). Three hot Jupiters transiting K-dwarfs with significant heavy element masses. Astronomy and Astrophysics, 700, A118. https://doi.org/10.1051/0004-6361/202553879… Read MoreSep. 26, 2025
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A new brown dwarf orbiting an M star and an investigation of the eccentricity distribution of transiting long-period brown dwarfs
Gan, Tianjun, Cadieux, Charles, Ida, Shigeru, Wang, Sharon Xuesong, Mao, Shude, Lin, Zitao, Stassun, Keivan Guadalupe, Burgasser, Adam J., Howell, Steve B., & Clark, Catherine A. (2025). “A new brown dwarf orbiting an M star and an investigation of the eccentricity distribution of transiting long-period brown dwarfs.”… Read MoreAug. 25, 2025
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HD 35843: A Sun-like star hosting a long-period sub-Neptune and inner super-Earth
Hesse, Katharine M., Mireles, Ismael, Bouchy, François, Dragomir, Diana, Ulmer-Moll, Solene, Eisner, Nora L., Stassun, Keivan Guadalupe, Quinn, Samuel N., Osborn, Hugh P., & Sousa, Sérgio G. (2025). “HD 35843: A Sun-like star hosting a long-period sub-Neptune and inner super-Earth.” Astronomical Journal, 170(2), 108. https://doi.org/10.3847/1538-3881/add7d7… Read MoreAug. 25, 2025