Zobrazeno 1 - 10
of 1 098
pro vyhledávání: '"A J, Davy"'
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
Autor:
Burgasser, Adam J., Schneider, Adam C., Meisner, Aaron M., Caselden, Dan, Hsu, Chih-Chun, Gerasimov, Roman, Aganze, Christian, Softich, Emma, Karpoor, Preethi, Theissen, Christopher A., Brooks, Hunter, Bickle, Thomas P., Gagné, Jonathan, Artigau, Étienne, Marsset, Michaël, Rothermich, Austin, Faherty, Jacqueline K., Kirkpatrick, J. Davy, Kuchner, Marc J., Andersen, Nikolaj Stevnbak, Beaulieu, Paul, Colin, Guillaume, Gantier, Jean Marc, Gramaize, Leopold, Hamlet, Les, Hinckley, Ken, Kabatnik, Martin, Kiwy, Frank, Martin, David W., Massat, Diego H., Pendrill, William, Sainio, Arttu, Schümann, Jörg, Thévenot, Melina, Walla, Jim, Wędracki, Zbigniew, Worlds, the Backyard, Collaboration, Planet 9
We report the results of a spectroscopic survey of candidate T subdwarfs identified by the Backyard Worlds: Planet 9 program. Near-infrared spectra of 31 sources with red $J-W2$ colors and large $J$-band reduced proper motions show varying signatures
Externí odkaz:
http://arxiv.org/abs/2411.01378
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
Autor:
Beiler, Samuel A., Mukherjee, Sagnick, Cushing, Michael C., Kirkpatrick, J. Davy, Schneider, Adam C., Kothari, Harshil, Marley, Mark S., Visscher, Channon
The sensitivity and spectral coverage of JWST is enabling us to test our assumptions of ultracool dwarf atmospheric chemistry, especially with regards to the abundances of phosphine (PH$_3$) and carbon dioxide (CO$_2$). In this paper, we use NIRSpec
Externí odkaz:
http://arxiv.org/abs/2407.15950
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
Autor:
Beiler, Samuel A., Cushing, Michael C., Kirkpatrick, J. Davy, Schneider, Adam C., Mukherjee, Sagnick, Marley, Mark S., Marocco, Federico, Smart, Richard L.
We present infrared spectral energy distributions of 23 late-type T and Y dwarfs obtained with the James Webb Space Telescope. The spectral energy distributions consist of NIRSpec PRISM and MIRI LRS spectra covering the $\sim$1--12 $\mu$m wavelength
Externí odkaz:
http://arxiv.org/abs/2407.08518
Autor:
Van Dyk, Schuyler D., Szalai, Tamas, Cutri, Roc M., Kirkpatrick, J. Davy, Grillmair, Carl J., Fajardo-Acosta, Sergio B., Masiero, Joseph R., Mainzer, Amy K., Gelino, Christopher R., Vinko, Jozsef, Joo, Andras Peter, Pal, Andras, Konyves-Toth, Reka, Kriskovics, Levente, Szakats, Robert, Vida, Krisztian, Zheng, WeiKang, Brink, Thomas G., Filippenko, Alexei V.
The reactivated Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE-R) serendipitously caught the Type II supernova SN 2023ixf in Messier 101 on the rise, starting day 3.6 through day 10.9, and on the late-time decline from days 211 throug
Externí odkaz:
http://arxiv.org/abs/2406.18005
Autor:
Raghu, Yadukrishna, Kirkpatrick, J. Davy, Marocco, Federico, Gelino, Christopher R., Gagliuffi, Daniella C. Bardalez, Faherty, Jacqueline K., Schurr, Steven D., Schneider, Adam C., Meisner, Aaron M., Kuchner, Marc J., Brooks, Hunter, Grigorian, Jake, Worlds, The Backyard, Collaboration, Planet 9
After decades of brown dwarf discovery and follow-up, we can now infer the functional form of the mass distribution within 20 parsecs, which serves as a constraint on star formation theory at the lowest masses. Unlike objects on the main sequence tha
Externí odkaz:
http://arxiv.org/abs/2406.09690
Autor:
Kothari, Harshil, Cushing, Michael C., Burningham, Ben, Beiler, Samuel A., Kirkpatrick, J. Davy, Schneider, Adam C., Mukherjee, Sagnick, Marley, Mark S.
We present an atmospheric retrieval analysis of the Y0 brown dwarf WISE J035934.06$-$540154.6 using the low-resolution 0.96--12 $\mu$m JWST spectrum presented in \citet{Beiler_2023}. We obtain volume number mixing ratios of the major gas-phase absorb
Externí odkaz:
http://arxiv.org/abs/2406.06493
Autor:
Bickle, Thomas P., Schneider, Adam C., Gagné, Jonathan, Faherty, Jacqueline K., Rothermich, Austin, Vos, Johanna M., Suárez, Genaro, Kirkpatrick, J. Davy, Meisner, Aaron M., Kuchner, Marc J., Burgasser, Adam J., Marocco, Federico, Casewell, Sarah L., Caselden, Dan, Gagliuffi, Daniella Bardalez, Worlds, The Backyard, Collaboration, Planet 9
We present the discovery of VHS J183135.58$-$551355.9 (hereafter VHS J1831$-$5513), an L/T transition dwarf identified as a result of its unusually red near-infrared colors ($J-K_{\rm S}=3.633\pm0.277$ mag; $J-W2=6.249\pm0.245$ mag) from the VISTA He
Externí odkaz:
http://arxiv.org/abs/2405.03849