Exoplanets and Stellar Physics

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Water observed in the atmosphere of {\tau} Bootis Ab with CARMENES/CAHA

(2022)

Authors:

Rebecca K Webb, Siddharth Gandhi, Matteo Brogi, Jayne L Birkby, Ernst de Mooij, Ignas Snellen, Yapeng Zhang
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Plant power: Burning biomass instead of coal can help fight climate change—but only if done right

Bulletin of the Atomic Scientists Taylor & Francis 78:3 (2022) 125-127
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A Radial Velocity Study of the Planetary System of π Mensae: Improved Planet Parameters for π Mensae c and a Third Planet on a 125 Day Orbit

The Astronomical Journal American Astronomical Society 163:5 (2022) 223

Authors:

Artie P Hatzes, Davide Gandolfi, Judith Korth, Florian Rodler, Silvia Sabotta, Massimiliano Esposito, Oscar Barragán, Vincent Van Eylen, John H Livingston, Luisa Maria Serrano, Rafael Luque, Alexis MS Smith, Seth Redfield, Carina M Persson, Martin Pätzold, Enric Palle, Grzegorz Nowak, Hannah LM Osborne, Norio Narita, Savita Mathur, Kristine WF Lam, Petr Kabáth, Marshall C Johnson, Eike W Guenther, Sascha Grziwa, Elisa Goffo, Malcolm Fridlund, Michael Endl, Hans J Deeg, Szilard Csizmadia, William D Cochran, Lucía González Cuesta, Priyanka Chaturvedi, Ilaria Carleo, Juan Cabrera, Paul G Beck, Simon Albrecht
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Dynamical Architecture of the HD 107148 Planetary System

The Astronomical Journal American Astronomical Society 163:5 (2022) 198

Authors:

Jan Eberhardt, Trifon Trifonov, Martin Kürster, Stephan Stock, Thomas Henning, Anna Wollbold, Sabine Reffert, Man Hoi Lee, Mathias Zechmeister, Florian Rodler, Olga Zakhozhay, Paul Heeren, Davide Gandolfi, Oscar Barragán, Marcelo Tala Pinto, Vera Wolthoff, Paula Sarkis, Stefan S Brems
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On the viability of determining galaxy properties from observations I: Star formation rates and kinematics

Monthly Notices of the Royal Astronomical Society Oxford University Press 513:3 (2022) 3906-3924

Authors:

Kearn Grisdale, Laurence Hogan, Dimitra Rigopoulou, Niranjan Thatte, Miguel Pereira-Santaella, Julien Devriendt, Adrianne Slyz, Ismael García-Bernete, Yohan Dubois, Sukyoung K Yi, Katarina Kraljic

Abstract:

We explore how observations relate to the physical properties of the emitting galaxies by post-processing a pair of merging z ∼ 2 galaxies from the cosmological, hydrodynamical simulation NEWHORIZON, using LCARS (Light from Cloudy Added to RAMSES) to encode the physical properties of the simulated galaxy into H α emission line. By carrying out mock observations and analysis on these data cubes, we ascertain which physical properties of the galaxy will be recoverable with the HARMONI spectrograph on the European Extremely Large Telescope (ELT). We are able to estimate the galaxy’s star formation rate and dynamical mass to a reasonable degree of accuracy, with values within a factor of 1.81 and 1.38 of the true value. The kinematic structure of the galaxy is also recovered in mock observations. Furthermore, we are able to recover radial profiles of the velocity dispersion and are therefore able to calculate how the dynamical ratio varies as a function of distance from the galaxy centre. Finally, we show that when calculated on galaxy scales the dynamical ratio does not always provide a reliable measure of a galaxy’s stability against gravity or act as an indicator of a minor merger.
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