Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Christopher A Theissen"'
Autor:
Kyle Franson, William O. Balmer, Brendan P. Bowler, Laurent Pueyo, Yifan Zhou, Emily Rickman, Zhoujian Zhang, Sagnick Mukherjee, Tim D. Pearce, Daniella C. Bardalez Gagliuffi, Lauren I. Biddle, Timothy D. Brandt, Rachel Bowens-Rubin, Justin R. Crepp, James W. Davidson Jr., Jacqueline Faherty, Christian Ginski, Elliott P. Horch, Marvin Morgan, Caroline V. Morley, Marshall D. Perrin, Aniket Sanghi, Maïssa Salama, Christopher A. Theissen, Quang H. Tran, Trevor N. Wolf
Publikováno v:
The Astrophysical Journal Letters, Vol 974, Iss 1, p L11 (2024)
With a dynamical mass of 3 M _Jup , the recently discovered giant planet AF Lep b is the lowest-mass imaged planet with a direct mass measurement. Its youth and spectral type near the L/T transition make it a promising target to study the impact of c
Externí odkaz:
https://doaj.org/article/122b8bd6b18c434e93cbf8296d60a7ca
Autor:
Adam J. Burgasser, Roman Gerasimov, Kyle Kremer, Hunter Brooks, Efrain Alvarado III, Adam C. Schneider, Aaron M. Meisner, Christopher A. Theissen, Emma Softich, Preethi Karpoor, Thomas P. Bickle, Martin Kabatnik, Austin Rothermich, Dan Caselden, J. Davy Kirkpatrick, Jacqueline K. Faherty, Sarah L. Casewell, Marc J. Kuchner, The Backyard Worlds: Planet 9 Collaboration
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L25 (2024)
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:
https://doaj.org/article/4986ac695b8943b2b4bcb6950e377b9b
Autor:
Simon Petrus, Niall Whiteford, Polychronis Patapis, Beth A. Biller, Andrew Skemer, Sasha Hinkley, Genaro Suárez, Paulina Palma-Bifani, Caroline V. Morley, Pascal Tremblin, Benjamin Charnay, Johanna M. Vos, Jason J. Wang, Jordan M. Stone, Mickaël Bonnefoy, Gaël Chauvin, Brittany E. Miles, Aarynn L. Carter, Anna Lueber, Christiane Helling, Ben J. Sutlieff, Markus Janson, Eileen C. Gonzales, Kielan K. W. Hoch, Olivier Absil, William O. Balmer, Anthony Boccaletti, Mariangela Bonavita, Mark Booth, Brendan P. Bowler, Zackery W. Briesemeister, Marta L. Bryan, Per Calissendorff, Faustine Cantalloube, Christine H. Chen, Elodie Choquet, Valentin Christiaens, Gabriele Cugno, Thayne Currie, Camilla Danielski, Matthew De Furio, Trent J. Dupuy, Samuel M. Factor, Jacqueline K. Faherty, Michael P. Fitzgerald, Jonathan J. Fortney, Kyle Franson, Julien H. Girard, Carol A. Grady, Thomas Henning, Dean C. Hines, Callie E. Hood, Alex R. Howe, Paul Kalas, Jens Kammerer, Grant M. Kennedy, Matthew A. Kenworthy, Pierre Kervella, Minjae Kim, Daniel Kitzmann, Adam L. Kraus, Masayuki Kuzuhara, Pierre-Olivier Lagage, Anne-Marie Lagrange, Kellen Lawson, Cecilia Lazzoni, Jarron M. Leisenring, Ben W. P. Lew, Michael C. Liu, Pengyu Liu, Jorge Llop-Sayson, James P. Lloyd, Bruce Macintosh, Mathilde Mâlin, Elena Manjavacas, Sebastián Marino, Mark S. Marley, Christian Marois, Raquel A. Martinez, Elisabeth C. Matthews, Brenda C. Matthews, Dimitri Mawet, Johan Mazoyer, Michael W. McElwain, Stanimir Metchev, Michael R. Meyer, Maxwell A. Millar-Blanchaer, Paul Mollière, Sarah E. Moran, Sagnick Mukherjee, Eric Pantin, Marshall D. Perrin, Laurent Pueyo, Sascha P. Quanz, Andreas Quirrenbach, Shrishmoy Ray, Isabel Rebollido, Jea Adams Redai, Bin B. Ren, Emily Rickman, Steph Sallum, Matthias Samland, Benjamin Sargent, Joshua E. Schlieder, Karl R. Stapelfeldt, Motohide Tamura, Xianyu Tan, Christopher A. Theissen, Taichi Uyama, Malavika Vasist, Arthur Vigan, Kevin Wagner, Kimberly Ward-Duong, Schuyler G. Wolff, Kadin Worthen, Mark C. Wyatt, Marie Ygouf, Alice Zurlo, Xi Zhang, Keming Zhang, Zhoujian Zhang, Yifan Zhou
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 1, p L11 (2024)
The unprecedented medium-resolution ( R _λ ∼ 1500–3500) near- and mid-infrared (1–18 μ m) spectrum provided by JWST for the young (140 ± 20 Myr) low-mass (12–20 M _Jup ) L–T transition (L7) companion VHS 1256 b gives access to a catalog
Externí odkaz:
https://doaj.org/article/2ccf196feed84f35bcdd47890e4c8e46
Autor:
Steph Sallum, Shrishmoy Ray, Jens Kammerer, Anand Sivaramakrishnan, Rachel Cooper, Alexandra Z. Greebaum, Deepashri Thatte, Matthew De Furio, Samuel M. Factor, Michael R. Meyer, Jordan M. Stone, Aarynn Carter, Beth Biller, Sasha Hinkley, Andrew Skemer, Genaro Suárez, Jarron M. Leisenring, Marshall D. Perrin, Adam L. Kraus, Olivier Absil, William O. Balmer, Sarah K. Betti, Anthony Boccaletti, Mariangela Bonavita, Mickael Bonnefoy, Mark Booth, Brendan P. Bowler, Zackery W. Briesemeister, Marta L. Bryan, Per Calissendorff, Faustine Cantalloube, Gael Chauvin, Christine H. Chen, Elodie Choquet, Valentin Christiaens, Gabriele Cugno, Thayne Currie, Camilla Danielski, Trent J. Dupuy, Jacqueline K. Faherty, Michael P. Fitzgerald, Jonathan J. Fortney, Kyle Franson, Julien H. Girard, Carol A. Grady, Eileen C. Gonzales, Thomas Henning, Dean C. Hines, Kielan K. W. Hoch, Callie E. Hood, Alex R. Howe, Markus Janson, Paul Kalas, Grant M. Kennedy, Matthew A. Kenworthy, Pierre Kervella, Daniel Kitzmann, Masayuki Kuzuhara, Anne-Marie Lagrange, Pierre-Olivier Lagage, Kellen Lawson, Cecilia Lazzoni, Ben W. P. Lew, Michael C. Liu, Pengyu Liu, Jorge Llop-Sayson, James P. Lloyd, Anna Lueber, Bruce Macintosh, Elena Manjavacas, Sebastian Marino, Mark S. Marley, Christian Marois, Raquel A. Martinez, Brenda C. Matthews, Elisabeth C. Matthews, Dimitri Mawet, Johan Mazoyer, Michael W. McElwain, Stanimir Metchev, Brittany E. Miles, Maxwell A. Millar-Blanchaer, Paul Molliere, Sarah E. Moran, Caroline V. Morley, Sagnick Mukherjee, Paulina Palma-Bifani, Eric Pantin, Polychronis Patapis, Simon Petrus, Laurent Pueyo, Sascha P. Quanz, Andreas Quirrenbach, Isabel Rebollido, Jea Adams Redai, Bin B. Ren, Emily Rickman, Matthias Samland, B. A. Sargent, Joshua E. Schlieder, Glenn Schneider, Karl R. Stapelfeldt, Ben J. Sutlieff, Motohide Tamura, Xianyu Tan, Christopher A. Theissen, Taichi Uyama, Arthur Vigan, Malavika Vasist, Johanna M. Vos, Kevin Wagner, Jason J. Wang, Kimberly Ward-Duong, Niall Whiteford, Schuyler G. Wolff, Kadin Worthen, Mark C. Wyatt, Marie Ygouf, Xi Zhang, Keming Zhang, Zhoujian Zhang, Yifan Zhou, Alice Zurlo
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L2 (2024)
We present a performance analysis for the aperture masking interferometry (AMI) mode on board the James Webb Space Telescope Near Infrared Imager and Slitless Spectrograph (JWST/NIRISS). Thanks to self-calibrating observables, AMI accesses inner work
Externí odkaz:
https://doaj.org/article/2cfadde877a840b2939806fecd9aa9bc
Autor:
Chih-Chun Hsu, Adam J. Burgasser, Christopher A. Theissen, Jessica L. Birky, Christian Aganze, Roman Gerasimov, Sarah J. Schmidt, Cullen H. Blake, Kevin R. Covey, Elizabeth Moreno-Hilario, Christopher R. Gelino, Javier Serna, Joel R. Brownstein, Katia Cunha
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 274, Iss 2, p 40 (2024)
We present precise measurements of radial (RV) and projected rotational ( $v\sin i$ ) velocities of a sample of 258 M6 to L2 dwarfs with multiepoch, high-resolution ( λ /Δ λ = 22,500), near-infrared (1.514–1.696 μ m) spectroscopic observations
Externí odkaz:
https://doaj.org/article/2d566a9a22f047eda558d614d6083c55
Autor:
Kielan K. W. Hoch, Christopher A. Theissen, Travis S. Barman, Marshall D. Perrin, Jean-Baptiste Ruffio, Emily Rickman, Quinn M. Konopacky, Elena Manjavacas, William O. Balmer, Laurent Pueyo, Jens Kammerer, Roeland P. van der Marel, Nikole K. Lewis, Julien H. Girard, Sara Seager, Mark Clampin, C. Matt Mountain
Publikováno v:
The Astronomical Journal, Vol 168, Iss 4, p 187 (2024)
We present the atmospheric characterization of the substellar companion HD 19467 B as part of the pioneering James Webb Space Telescope Guaranteed Time Observer program to obtain moderate resolution spectra ( R ∼ 2700, 3–5 μ m) of a high-contras
Externí odkaz:
https://doaj.org/article/b1b28ee9aa034b248cbfcbd4257bb340
Autor:
Jean-Baptiste Ruffio, Marshall D. Perrin, Kielan K. W. Hoch, Jens Kammerer, Quinn M. Konopacky, Laurent Pueyo, Alex Madurowicz, Emily Rickman, Christopher A. Theissen, Shubh Agrawal, Alexandra Z. Greenbaum, Brittany E. Miles, Travis S. Barman, William O. Balmer, Jorge Llop-Sayson, Julien H. Girard, Isabel Rebollido, Rémi Soummer, Natalie H. Allen, Jay Anderson, Charles A. Beichman, Andrea Bellini, Geoffrey Bryden, Néstor Espinoza, Ana Glidden, Jingcheng Huang, Nikole K. Lewis, Mattia Libralato, Dana R. Louie, Sangmo Tony Sohn, Sara Seager, Roeland P. van der Marel, Hannah R. Wakeford, Laura L. Watkins, Marie Ygouf, C. Matt Mountain
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 73 (2024)
The JWST NIRSpec integral field unit (IFU) presents a unique opportunity to observe directly imaged exoplanets from 3 to 5 μ m at moderate spectral resolution ( R ∼ 2700) and thereby better constrain the composition, disequilibrium chemistry, and
Externí odkaz:
https://doaj.org/article/a6065c46828f4c7781b63d7ec94f9b55
Autor:
Clarissa R. Do Ó, Ben Sappey, Quinn M. Konopacky, Jean-Baptiste Ruffio, Kelly K. O’Neil, Tuan Do, Gregory Martinez, Travis S. Barman, Jayke S. Nguyen, Jerry W. Xuan, Christopher A. Theissen, Sarah Blunt, William Thompson, Chih-Chun Hsu, Ashley Baker, Randall Bartos, Geoffrey A. Blake, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Daniel Echeverri, Luke Finnerty, Michael P. Fitzgerald, Julie Inglis, Nemanja Jovanovic, Ronald A. López, Dimitri Mawet, Evan Morris, Jacklyn Pezzato, Tobias Schofield, Andrew Skemer, J. Kent Wallace, Jason J. Wang, Ji Wang, Joshua Liberman
Publikováno v:
The Astronomical Journal, Vol 167, Iss 6, p 278 (2024)
The 1RXS J034231.8+121622 system consists of an M dwarf primary and a directly imaged low-mass stellar companion. We use high-resolution spectroscopic data from Keck/KPIC to estimate the objects' atmospheric parameters and radial velocities (RVs). Us
Externí odkaz:
https://doaj.org/article/3ebac443db7041f89129512527ea08aa
Autor:
Austin Rothermich, Jacqueline K. Faherty, Daniella Bardalez-Gagliuffi, Adam C. Schneider, J. Davy Kirkpatrick, Aaron M. Meisner, Adam J. Burgasser, Marc Kuchner, Katelyn Allers, Jonathan Gagné, Dan Caselden, Emily Calamari, Mark Popinchalk, Genaro Suárez, Roman Gerasimov, Christian Aganze, Emma Softich, Chin-Chun Hsu, Preethi Karpoor, Christopher A. Theissen, Jon Rees, Rosario Cecilio-Flores-Elie, Michael C. Cushing, Federico Marocco, Sarah Casewell, Thomas P. Bickle, Les Hamlet, Michaela B. Allen, Paul Beaulieu, Guillaume Colin, Jean Marc Gantier, Leopold Gramaize, Peter Jalowiczor, Martin Kabatnik, Frank Kiwy, David W. Martin, Billy Pendrill, Ben Pumphrey, Arttu Sainio, Jorg Schumann, Nikolaj Stevnbak, Guoyou Sun, Christopher Tanner, Vinod Thakur, Melina Thevenot, Zbigniew Wedracki
Publikováno v:
The Astronomical Journal, Vol 167, Iss 6, p 253 (2024)
We report the identification of 89 new systems containing ultracool dwarf companions to main-sequence stars and white dwarfs, using the citizen science project Backyard Worlds: Planet 9 and cross-reference between Gaia and CatWISE2020. 32 of these co
Externí odkaz:
https://doaj.org/article/4ff0311137ff4905a4804ad805381366
Autor:
Lingfeng Wei, Christopher A. Theissen, Quinn M. Konopacky, Jessica R. Lu, Chih-Chun Hsu, Dongwon Kim
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 174 (2024)
We present the kinematic analysis of 246 stars within $4^{\prime} $ from the center of Orion Nebula Cluster (ONC), the closest massive star cluster with active star formation across the full mass range, which provides valuable insights in the formati
Externí odkaz:
https://doaj.org/article/0281753273ed45149f1ecf9cd8a20c00