The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. V. Do Self-consistent Atmospheric Models Represent JWST Spectra? A Showcase with VHS 1256–1257 b

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

Aggregation and Charging of Mineral Cloud Particles under High-energy Irradiation

Autor: Nanna Bach-Møller, Christiane Helling, Uffe G. Jørgensen, Martin B. Enghoff

Publikováno v: The Astrophysical Journal, Vol 962, Iss 1, p 87 (2024)

It is known from Earth that ionizing high-energy radiation can lead to ion-induced nucleation of cloud condensation nuclei in the atmosphere. Since the amount of high-energy radiation can vary greatly based on the radiative environment of a host star

Externí odkaz: https://doaj.org/article/cf8108d53a124750add0ed4b371c038c

Isotopic constraints on lightning as a source of fixed nitrogen in Earth’s early biosphere

Autor: Patrick Barth, Eva E. Stüeken, Christiane Helling, Lukas Rossmanith, Yuqian Peng, Wendell Walters, Mark Claire

Publikováno v: Nature Geoscience.

Bioavailable nitrogen is thought to be a requirement for the origin and sustenance of life. Before the onset of biological nitrogen fixation, abiotic pathways to fix atmospheric N2 must have been prominent to provide bioavailable nitrogen to Earth's

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fca1b5324fe650876451d9af92e2e444
https://doi.org/10.1038/s41561-023-01187-2

The effect of thermal non-equilibrium on aerosol formation in astrophysical environments

Autor: Sven Kiefer, David Gobrecht, Leen Decin, Christiane Helling

From our Solar System, we know that gas giant planets are covered in clouds and we expect the same to hold true for many exoplanet gas giants. Knowing the composition and size of cloud particles and where they form within exoplanet atmospheres is cru

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::636523c7755161bbc0c50b35482ba900
https://doi.org/10.5194/egusphere-egu23-12293

Anonymous Questionary to Minimize Biases in the Application Process of PhD Candidates for the Young Researcher Program in Graz

Autor: Ruth-Sophie Taubner, Christiane Helling, Astrid Veronig

In 2022, the Space Research Institute in Graz (Austria) together with the Graz University of Technology and the University of Graz launches the Young Researcher Program in interdisciplinary space science and planetary research (YRP@Graz). This progra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a401b64b7e4d0a61bf2577d913ccd24a
https://doi.org/10.5194/epsc2022-52