New Ultracool Companions to Nearby White Dwarfs

Autor: Bravo, Alexia, Schneider, Adam C., Casewell, Sarah, Rothermich, Austin, Faherty, Jacqueline K., French, Jenni R., Bickle, Thomas P., Meisner, Aaron M., Kirkpatrick, J. Davy, Kuchner, Marc J., Burgasser, Adam J., Marocco, Federico, Debes, John H., Sainio, Arttu, Gramaize, Léopold, Kiwy, Frank, Jalowiczor, Peter A., Abdullahi, Awab

We conducted a search for new ultracool companions to nearby white dwarfs using multiple methods, including the analysis of colors and examination of images in both the optical and the infrared. Through this process, we identified fifty-one previousl

Externí odkaz: http://arxiv.org/abs/2412.04597

Discovery of 118 New Ultracool Dwarf Candidates Using Machine Learning Techniques

Autor: Brooks, Hunter, Caselden, Dan, Kirkpatrick, J. Davy, Raghu, Yadukrishna, Elachi, Charles, Grigorian, Jake, Trek, Asa, Washburn, Andrew, Higashimura, Hiro, Meisner, Aaron, Schneider, Adam, Faherty, Jacqueline, Marocco, Federico, Gelino, Christopher, Gagné, Jonathan, Bickle, Thomas, Tang, Shih-yun, Rothermich, Austin, Burgasser, Adam, Kuchner, Marc J., Beaulieu, Paul, Bell, John, Colin, Guillaume, Colombo, Giovanni, Dereveanco, Alexandru, Flores, Deiby, Glebov, Konstantin, Gramaize, Leopold, Hamlet, Les, Hinckley, Ken, Kabatnik, Martin, Kiwy, Frank, Martin, David, Palma, Raul, Pendrill, William, Ruiz, Lizzeth, Sanchez, John, Sainio, Arttu, SchÜmann, JÖrg, Schonau, Manfred, Tanner, Christopher, Andersen, Nikolaj Stevnbak, Stenner, Andrés, Thévenot, Melina, Thakur, Vinod, Voloshin, Nikita, Wedracki, Zbigniew

We present the discovery of 118 new ultracool dwarf candidates, discovered using a new machine learning tool, named \texttt{SMDET}, applied to time series images from the Wide-field Infrared Survey Explorer. We gathered photometric and astrometric da

Externí odkaz: http://arxiv.org/abs/2408.14447

Discovery of a Hypervelocity L Subdwarf at the Star/Brown Dwarf Mass Limit

Autor: Burgasser, Adam J., Gerasimov, Roman, Kremer, Kyle, Brooks, Hunter, Alvarado III, Efrain, Schneider, Adam C., Meisner, Aaron M., Theissen, Christopher A., Softich, Emma, Karpoor, Preethi, Bickle, Thomas P., Kabatnik, Martin, Rothermich, Austin, Caselden, Dan, Kirkpatrick, J. Davy, Faherty, Jacqueline K., Casewell, Sarah L., Kuchner, Marc J., Worlds, the Backyard, Collaboration, Planet 9

We report the discovery of a high velocity, very low-mass star or brown dwarf whose kinematics suggest it is unbound to the Milky Way. CWISE J124909.08+362116.0 was identified by citizen scientists in the Backyard Worlds: Planet 9 program as a high p

Externí odkaz: http://arxiv.org/abs/2407.08578

Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE

Autor: Marocco, Federico, Kirkpatrick, J. Davy, Schneider, Adam C., Meisner, Aaron M., Popinchalk, Mark, Gelino, Christopher R., Faherty, Jacqueline K., Burgasser, Adam J., Caselden, Dan, Gagné, Jonathan, Aganze, Christian, Bardalez-Gagliuffi, Daniella C., Casewell, Sarah L., Hsu, Chih-Chun, Kiman, Rocio, Eisenhardt, Peter R. M., Kuchner, Marc J., Stern, Daniel, Gramaize, Léopold, Sainio, Arttu, Bickle, Thomas P., Rothermich, Austin, Pendrill, William, Thévenot, Melina, Kabatnik, Martin, Colombo, Giovanni, Higashimura, Hiro, Kiwy, Frank, Marchese, Elijah J., Andersen, Nikolaj Stevnbak, Tanner, Christopher, Walla, Jim, Wedracki, Zbigniew, Collaboration, The Backyard Worlds

We present the discovery of 13 new widely separated T dwarf companions to M dwarf primaries, identified using WISE/NEOWISE data by the CatWISE and Backyard Worlds: Planet 9 projects. This sample represents a $\sim$60% increase in the number of known

Externí odkaz: http://arxiv.org/abs/2404.14324

The Initial Mass Function Based on the Full-sky 20-pc Census of $\sim$3,600 Stars and Brown Dwarfs

Autor: Kirkpatrick, J. Davy, Marocco, Federico, Gelino, Christopher R., Raghu, Yadukrishna, Faherty, Jacqueline K., Gagliuffi, Daniella C. Bardalez, Schurr, Steven D., Apps, Kevin, Schneider, Adam C., Meisner, Aaron M., Kuchner, Marc J., Caselden, Dan, Smart, R. L., Casewell, S. L., Raddi, Roberto, Kesseli, Aurora, Andersen, Nikolaj Stevnbak, Antonini, Edoardo, Beaulieu, Paul, Bickle, Thomas P., Bilsing, Martin, Chieng, Raymond, Colin, Guillaume, Deen, Sam, Dereveanco, Alexandru, Doll, Katharina, Luca, Hugo A. Durantini, Frazer, Anya, Gantier, Jean Marc, Gramaize, Léopold, Grant, Kristin, Hamlet, Leslie K., Higashimura, Hiro, Hyogo, Michiharu, Jałowiczor, Peter A., Jonkeren, Alexander, Kabatnik, Martin, Kiwy, Frank, Martin, David W., Michaels, Marianne N., Pendrill, William, Machado, Celso Pessanha, Pumphrey, Benjamin, Rothermich, Austin, Russwurm, Rebekah, Sainio, Arttu, Sanchez, John, Sapelkin-Tambling, Fyodor Theo, Schümann, Jörg, Selg-Mann, Karl, Singh, Harshdeep, Stenner, Andres, Sun, Guoyou, Tanner, Christopher, Thévenot, Melina, Ventura, Maurizio, Voloshin, Nikita V., Walla, Jim, Wedracki, Zbigniew, Adorno, Jose I., Aganze, Christian, Allers, Katelyn N., Brooks, Hunter, Burgasser, Adam J., Calamari, Emily, Connor, Thomas, Costa, Edgardo, Eisenhardt, Peter R., Gagné, Jonathan, Gerasimov, Roman, Gonzales, Eileen C., Hsu, Chih-Chun, Kiman, Rocio, Li, Guodong, Low, Ryan, Mamajek, Eric, Pantoja, Blake M., Popinchalk, Mark, Rees, Jon M., Stern, Daniel, Suárez, Genaro, Theissen, Christopher, Tsai, Chao-Wei, Vos, Johanna M., Zurek, David, Worlds, The Backyard, Collaboration, Planet 9

A complete accounting of nearby objects -- from the highest-mass white dwarf progenitors down to low-mass brown dwarfs -- is now possible, thanks to an almost complete set of trigonometric parallax determinations from Gaia, ground-based surveys, and

Externí odkaz: http://arxiv.org/abs/2312.03639