Aerodynamic roughness of rippled beds under active saltation
Experiments were conducted over beds of loose sand-sized proxy material (~195 μm crushed nutshells) at freestream wind velocities exceeding the corresponding freestream threshold for…
Category: 2. Space
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No certainty of a Milky Way–Andromeda collision
Our results are based on numerically integrated initial conditions, which are, in turn, based on Monte Carlo samples of the observational data. We describe here the generation of the Monte Carlo samples, the numerical integration and our…
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The origins of very-wide-orbit planets
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This is a summary of: Izidoro, A. et al. Very-wide-orbit planets from dynamical instabilities during the…
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Evidence of haze control of Pluto’s atmospheric heat balance from JWST/MIRI thermal light curves
Stern, S. A. et al. The Pluto system: initial results from its exploration by New Horizons. Science 350, aad1815 (2015).
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Grundy, W. M. et al. Surface compositions across…
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SiO and a super-stellar C/O ratio in the atmosphere of the giant exoplanet WASP-121 b
Observations and data reduction
The WASP-121 system was continuously monitored for 37.8 h on 2022 October 14–15 using the Bright Object Time Series mode of the NIRSpec instrument on JWST. The observation began 145 min before secondary…
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Searching for GEMS: Two Super-Jupiters Around M Dwarfs that May have Formed via Gravitational Instability
We present the discovery of TOI-6303b and TOI-6330b, two massive transiting super-Jupiters orbiting a M0 and a M2 dwarf star, respectively, as part of the Searching for Giant Exoplanets around M-dwarf Stars (GEMS) survey. These were detected by…
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Observations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76
We conducted photometric observations for transit events of three exoplanetary systems HAT-P-36, XO-2 and WASP-76 using the 1 m and 2.4 m telescopes at Yunnan Observatories and the 0.85 m telescope at National Astronomical Observatories of China….
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Metallicity Distribution in M31 and M33 Based on the Tip of the Red Giant Branch Near-infrared Color
This study investigates the metallicity distribution in M31 and M33 by using the near-infrared color index J − K of the tip of the red giant branch (TRGB) of the member stars from Y. Ren et al. after removing foreground dwarf stars by a…
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Searching for Additional Planets in TESS Multiplanet Systems: Testing Empirical Models Based on Kepler Data
Multiplanet system architectures are frequently used to constrain possible formation and evolutionary pathways of observed exoplanets. Therefore, understanding the predictive and descriptive power of empirical exoplanetary system models is…
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WASP-121 b’s Transmission Spectrum Observed with JWST/NIRSpec G395H Reveals Thermal Dissociation and SiO in the Atmosphere
WASP-121 b has been established as a benchmark ultrahot Jupiter, serving as a laboratory for the atmospheric chemistry and dynamics of strongly irradiated extrasolar gas giants. Here, we present and analyze WASP-121 b’s transmission spectrum…
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