Results 41 to 50 of about 1,764,603 (268)

Searching for Exoplanets Using a Microresonator Astrocomb [PDF]

, 2018
Detection of weak radial velocity shifts of host stars induced by orbiting planets is an important technique for discovering and characterizing planets beyond our solar system.
A Dutt, AG Glenday, B Stern, C Huang, C Joshi, C. Beichman, CH Blake, CH Li, D Cole, D. Mawet, DA Braje, DJ Jones, DR Carlson, DT Spencer, Emily C. Martin, ES Lamb, F Leo, F Pepe, G. Doppmann, G. Vasisht, H Lee, H Murata, IS Grudinin, IS McLean, Ivan S. Grudinin, J. Wang, JF Kasting, K Beha, Kerry Vahala, M Cai, M Lezius, MG Suh, MG Suh, Michael P. Fitzgerald, MT Murphy, Myoung-Gyun Suh, N Pavlov, P Del’Haye, P Marin-Palomo, P Trocha, PH Wang, RA McCracken, S Spillane, S Wabnitz, S. Leifer, SA Diddams, Scott A. Diddams, Scott B. Papp, T Herr, T Kippenberg, T Steinmetz, T Wilken, TJ Kippenberg, V Brasch, X Yi, X Yi, Xu Yi, YK Feng, Yu-Hung Lai   +58 more
core   +3 more sources

Revised Properties and Dynamical History for the HD 17156 System

The Astronomical Journal, 2023
From the thousands of known exoplanets, those that transit bright host stars provide the greatest accessibility toward detailed system characterization.
Stephen R. Kane, Michelle L. Hill, Paul A. Dalba, Tara Fetherolf, Gregory W. Henry, Sergio B. Fajardo-Acosta, Crystal L. Gnilka, Andrew W. Howard, Steve B. Howell, Howard Isaacson   +9 more
doaj   +1 more source

An alternating minimization algorithm with trajectory for direct exoplanet detection. The AMAT algorithm [PDF]

Astronomy & Astrophysics
Effective image post-processing algorithms are vital for the successful direct imaging of exoplanets. Standard point spread function (PSF) subtraction methods use techniques based on a low-rank approximation to separate the rotating planet signal from ...
Hazan Daglayan, Simon Vary, O. Absil, F. Cantalloube, V. Christiaens, Nicolas Gillis, Laurent Jacques, Valentin Leplat, P.-A. Absil   +8 more
semanticscholar   +1 more source

Exoplanet detection in angular differential imaging: combining a statistics-based learning with a deep-based learning for improved detections

Astronomical Telescopes + Instrumentation, 2022
Direct imaging is an active research topic in astronomy for the detection and the characterization of young substellar objects. The very high contrast between the host star and its companions makes detection particularly challenging.
Olivier Flasseur, T. Bodrito, J. Mairal, J. Ponce, M. Langlois, A. Lagrange   +5 more
semanticscholar   +1 more source

Rossiter-McLaughlin detection of the 9-month period transiting exoplanet HIP41378 d [PDF]

Astronomy & Astrophysics, 2022
The Rossiter-McLaughlin (RM) effect is a method that allows us to measure the orbital obliquity of planets, which is an important constraint that has been used to understand the formation and migration mechanisms of planets, especially for hot Jupiters ...
S. Grouffal, A. Santerne, V. Bourrier, X. Dumusque, A. Triaud, L. Malavolta, V. Kunovac, David J Armstrong, O. Attia, S. Barros, I. Boisse, M. Deleuil, O. Demangeon, C. Dressing, P. Figueira, J. Lillo-Box, A. Mortier, D. Nardiello, N. Santos, S. Sousa   +19 more
semanticscholar   +1 more source

From Methane to Nanodiamond Precursors in Water: Superacid‐like Condensation Pathways Under Extreme Conditions

Angewandte Chemie, EarlyView.
Under extreme pressure and temperature, superionic water acts as a strong superacid, catalyzing methane polycondensation through pentacoordinated carbonium ions (CH5+). This discovery reveals the non‐classical carbocation chemistry underlying the early stages of diamond formation in water under extreme conditions.
Thomas Thévenet, Axel Dian, Matteo Cioni, Alexis Markovits, Sandro Scandolo, Arthur France‐Lanord, Flavio Siro Brigiano   +6 more
wiley   +2 more sources

Speckle noise reduction techniques for high-dynamic range imaging [PDF]

, 2007
High-dynamic range imaging from space in the visible, aiming in particular at the detection of terrestrial exoplanets, necessitates not only the use of a coronagraph, but also of adaptive optics to correct optical defects in real time.
Belikov, Belikov, Bordé, Bordé, Bordé, Codona, Dohlen, Give'on, Guyon, Guyon, Guyon, Kasdin, Kuchner, Lyot, Malbet, Pascal Bordé, Putnam, Roddier, Rouan, Shaklan, Traub, Trauger, Trauger, Wesley Traub   +23 more
core   +3 more sources

Machine Learning for Exoplanet Detection in High-Contrast Spectroscopy: Revealing Exoplanets by Leveraging Hidden Molecular Signatures in Cross-Correlated Spectra with Convolutional Neural Networks [PDF]

Astronomy & Astrophysics
The new generation of observatories and instruments (VLT/ERIS, JWST, ELT) motivate the development of robust methods to detect and characterise faint and close-in exoplanets.
E. O. Garvin, M. Bonse, Jean Hayoz, G. Cugno, Jonas Spiller, P. Patapis, Dominique Petit Dit de la Roche, Rakesh Nath-Ranga, O. Absil, Nicolai F. Meinshausen, S. Quanz   +10 more
semanticscholar   +1 more source

A new method for finding nearby white dwarfs exoplanets and detecting biosignatures

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT We demonstrate that the James Webb Space Telescope (JWST) can detect infrared (IR) excess from the blended light spectral energy distribution of spatially unresolved terrestrial exoplanets orbiting nearby white dwarfs. We find that JWST is capable of detecting warm (habitable-zone; Teq = 287 K) Earths or super-Earths and hot ...
Mary Anne Limbach, Andrew Vanderburg, Kevin B Stevenson, Simon Blouin, Caroline Morley, Jacob Lustig-Yaeger, Melinda Soares-Furtado, Markus Janson   +7 more
openaire   +2 more sources

Logistic regression to boost exoplanet detection performances [PDF]

Monthly notices of the Royal Astronomical Society
Direct imaging of exoplanets requires to separate the background noise from the exoplanet signals. Statistical methods have been recently proposed to avoid subtracting any signal of interest as opposed to initial self-subtracting methods based on ...
Hadrien Cambazard, N. Catusse, A. Chomez, A. Lagrange   +3 more
semanticscholar   +1 more source