Results 61 to 70 of about 1,022 (196)

Gaia Search for Stellar Companions of TESS Objects of Interest V

Astronomische Nachrichten, Volume 346, Issue 5, June 2025.
ABSTRACT In this paper, we present the latest results of our ongoing multiplicity survey of (Community) TESS Objects of Interest, using astrometry and photometry from the latest data release of the ESA Gaia mission to detect stellar companions of these stars and to characterize their properties.
Markus Mugrauer, Ann‐Kathrin Kollak, Lara Pietsch, Kai‐Uwe Michel   +3 more
wiley   +1 more source

A Microphysics Model of Multicomponent Venus' Clouds With a High‐Accuracy Condensation Scheme

Earth and Space Science, Volume 12, Issue 6, June 2025.
Abstract Accurate modeling of the Venusian cloud structure remains challenging due to its complex microphysical properties. Condensation primarily determines the cloud particle size distribution within the various cloud layers. However, existing Venus microphysics models mainly use a full‐stationary bin scheme, which may be prone to numerical diffusion
H. Karyu, T. Kuroda, A. Mahieux, S. Viscardy, A. Määttänen, N. Terada, S. Robert, A. C. Vandaele, M. Crucifix   +8 more
wiley   +1 more source

Multifluid Equations for MHD

Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.
Abstract A set of magnetohydrodynamic equations is developed for multiple ion species in the limit of small Larmor radius. The derivation proceeds to explicitly calculate the Lorentz force resulting from the small ion drift velocities. The net effect is that in this limit all the ions move perpendicular to the magnetic field with the same E×B $\mathbf ...
J. G. Lyon, V. G. Merkin, K. A. Sorathia, M. J. Wiltberger   +3 more
wiley   +1 more source

Identifying Exoplanet Candidates Using WaveCeptionNet

The Astronomical Journal
In this study, we propose a wavelet-transform-based light curve representation method and a CNN model based on Inception-v3 for fast classification of light curves, enabling the quick discovery of potentially interesting targets from massive data ...
Huiping Liao, Guangyue Ren, Xinghao Chen, Yuxiang Li, Guangwei Li   +4 more
doaj   +1 more source

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source

Saturns, but Not Super-Jupiters, Occur More Frequently in the Presence of Inner Super-Earths

The Astrophysical Journal
Studies from recent years have reached different conclusions regarding how frequently super-Earths are accompanied by long-period giant planets and vice versa. This relation has been predicted to be mass dependent by planet-formation models.
Etienne Lefèvre-Forján, Gijs D. Mulders   +1 more
doaj   +1 more source

Minimizing Star-spot Contamination of Exoplanet Transit Spectroscopy Using Alternate Normalization

The Astronomical Journal
Recently, M. H. Currie et al. (2023) simulated the detection of molecules in the atmospheres of temperate rocky exoplanets transiting nearby M-dwarf stars.
Drake Deming, Miles H. Currie, Victoria S. Meadows, Sarah Peacock   +3 more
doaj   +1 more source

A Direct Comparison between the Use of Double Gray and Multiwavelength Radiative Transfer in a General Circulation Model with and without Radiatively Active Clouds

The Astrophysical Journal
Inhomogeneous cloud formation and wavelength-dependent phenomena are expected to shape hot Jupiter atmospheres. We present a general circulation model with multiwavelength “picket fence” radiative transfer and radiatively active, temperature-dependent ...
Isaac Malsky, Emily Rauscher, Michael T. Roman, Elspeth K. H. Lee, Hayley Beltz, Arjun Savel, Eliza M.-R. Kempton, L. Cinque   +7 more
doaj   +1 more source

Toward High-precision Mass Measurements of Two Sub-Neptunes in the K2-266 Planetary System Through Transit Timing

The Astronomical Journal
Sub-Neptunes have been found to be one of the most common types of exoplanets, yet their physical parameters and properties are poorly determined and in need of further investigation.
Ing-Guey Jiang, Li-Chin Yeh, Billy Edwards, Ming Yang, Keivan G. Stassun, Napaporn A-thano   +5 more
doaj   +1 more source

Early Accretion of Large Amounts of Solids for Directly Imaged Exoplanets

The Astrophysical Journal
As the number of planetary-mass objects (PMOs; ⪅13 M _Jupiter ) at wider separation (⪆10 au) grows, there is emerging evidence that they form differently from their higher-mass brown dwarf counterparts.
Ji Wang
doaj   +1 more source