Results 71 to 80 of about 2,565,021 (373)
Simulations for Planning Next-generation Exoplanet Radial Velocity Surveys
The Astronomical Journal, 2023 Future direct imaging missions similar to the HabEx and LUVOIR mission concepts aim to catalog and characterize Earth-mass analogs around nearby stars.
Patrick D Newman +8 more
doaj +1 more source
Star Spot Induced Radial Velocity Variability in LkCa 19
, 2007 We describe a new radial velocity survey of T Tauri stars and present the first results. Our search is motivated by an interest in detecting massive young planets, as well as investigating the origin of the brown dwarf desert.
Bouvier J. +9 more
core +1 more source
Radial Velocity Planet Detection Biases at the Stellar Rotational Period [PDF]
, 2016 Future generations of precise radial velocity (RV) surveys aim to achieve sensitivity sufficient to detect Earth mass planets orbiting in their stars’ habitable zones.
A. Vanderburg +5 more
semanticscholar +1 more source
Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity
Molecular Oncology, EarlyView.Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung +17 more
wiley +1 more source
Radial Velocity Fitting Challenge. I. Simulating the data set including realistic stellar radial-velocity signals [PDF]
, 2016 Stellar signals are the main limitation for precise radial-velocity (RV) measurements. These signals arise from the photosphere of the stars. The m/s perturbation created by these signals prevents the detection and mass characterization of small-mass ...
X. Dumusque, X. Dumusque
semanticscholar +1 more source
International Journal of Adaptive Control and Signal Processing, EarlyView.This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley +1 more source
Report of IAU Commission 30 on Radial Velocities (2006-2009) [PDF]
, 2008 Brief summaries are given on the following subjects: Radial velocities and exoplanets (Toward Earth-mass planets; Retired A stars and their planets; Current status and prospects); Toward higher radial velocity precision; Radial velocities and ...
Glushkova, E. V. +7 more
core +1 more source
Radial velocity data analysis with compressed sensing techniques [PDF]
, 2016 We present a novel approach for analysing radial velocity data that combines two features: all the planets are searched at once and the algorithm is fast.
N. Hara, G. Bou'e, J. Laskar, A. Correia
semanticscholar +1 more source
Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control
Advanced Engineering Materials, EarlyView.This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian +4 more
wiley +1 more source
VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998.
Odessa Astronomical Publications, 2017 We use high-dispersion CCD spectrograms obtained in 1993 - 1998 to study parameter variations of the absorption and emission components Hα line of the star β Cephei. We show that radial velocity of the emission component does not depend on star pulsation
E. A. Panko, A. E. Tarasov
doaj +1 more source