Results 61 to 70 of about 631 (181)
Impacts of Carbon Dioxide Deposition on Martian Near‐Surface Wave Activity
Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.Abstract A prominent feature of Mars' winter atmosphere is near‐surface baroclinic wave activity. These waves exert strong control on dust storm variability and contribute to transport of heat, momentum, and dust. Using a suite of Mars general circulation model simulations, we investigate an underexplored connection between near‐surface wave activity ...
Hung Kwan Fok +2 more
wiley +1 more source
A radiometric model for demonstration of exoplanets detection by the transit method
Physics EducationAbstract This work describes an exact radiometric model for experimental demonstrators of the detection of exoplanets by the transit method. This model generalises the calculation of the depth of occultation from the standard transit method to the case of a finite size demonstrator apparatus.
T M Seixas, M A Salgueiro da Silva
openaire +1 more source
The Astrophysical Journal LettersDetections of long-period giant exoplanets will expand dramatically with Gaia Data Release 4, but interpreting these signals will require care. We derive the astrometric resoeccentric degeneracy: an astrometric analogue of the well-known radial velocity ...
Daniel A. Yahalomi +6 more
doaj +1 more source
The Astronomical JournalThe degree of alignment between a star’s spin axis and the orbital plane of its planets (the stellar obliquity) is related to interesting and poorly understood processes that occur during planet formation and evolution.
Nicholas Saunders +55 more
doaj +1 more source
The Astronomical JournalGaia astrometry of nearby stars is precise enough to detect the tiny displacements induced by substellar companions, but radial velocity (RV) data are needed for definitive confirmation.
Gudmundur Stefánsson +33 more
doaj +1 more source
The GPU phase folding and deep learning method for detecting exoplanet transits
Monthly Notices of the Royal Astronomical SocietyABSTRACT This paper presents GPFC, a novel Graphics Processing Unit (GPU) Phase Folding and Convolutional Neural Network (CNN) system to detect exoplanets using the transit method. We devise a fast-folding algorithm parallelized on a GPU to amplify low signal-to-noise ratio transit signals, allowing a search at high precision and speed ...
Kaitlyn Wang +4 more
openaire +2 more sources
The NEID Earth Twin Survey. III. Survey Performance after Three Years on Sky
The Astronomical JournalThe NEID Earth Twin Survey (NETS) has been delivering a rich set of precise radial velocity (RV) measurements for 41 bright, nearby main-sequence stars.
Arvind F. Gupta +24 more
doaj +1 more source
The Astronomical JournalIt has been suggested that giant planet occurrence peaks for stars with M _* ≈ 3 M _⊙ at a value a factor of 4 higher than observed for solar-mass stars.
Sihao Cheng +2 more
doaj +1 more source
The Astronomical JournalWe report the discovery of a new massive giant planet, HD 164604 c ( ${a}_{c}=5.55{6}_{-0.10}^{+0.093}$ au, ${e}_{c}=0.19{6}_{-0.078}^{+0.078}$ , and ${m}_{c}=9.{5}_{-1.25}^{+1.2}$ , or $7.{6}_{-1.0}^{+1.0}\,{M}_{{\rm{Jup}}}$ ), orbiting a K3.5 dwarf ...
Guang-Yao Xiao +6 more
doaj +1 more source
The Interpolation Constraint in the RV Analysis of M Dwarfs Using Empirical Templates
The Astronomical JournalPrecise radial velocity (pRV) measurements of M dwarfs in the near-infrared rely on empirical templates due to the lack of accurate stellar spectral models in this regime.
Dhvani Doshi +6 more
doaj +1 more source