Results 21 to 30 of about 2,057,964 (253)

MagAO-X and HST High-contrast Imaging of the AS209 Disk at Hα

The Astronomical Journal, 2023
The detection of emission lines associated with accretion processes is a direct method for studying how and where gas giant planets form, how young planets interact with their natal protoplanetary disk, and how volatile delivery to their atmosphere takes
Gabriele Cugno, Yifan Zhou, Thanawuth Thanathibodee, Per Calissendorff, Michael R. Meyer, Suzan Edwards, Jaehan Bae, Myriam Benisty, Edwin Bergin, Matthew De Furio, Stefano Facchini, Jared R. Males, Laird M. Close, Richard D. Teague, Olivier Guyon, Sebastiaan Y. Haffert, Alexander D. Hedglen, Maggie Kautz, Andrés Izquierdo, Joseph D. Long, Jennifer Lumbres, Avalon L. McLeod, Logan A. Pearce, Lauren Schatz, Kyle Van Gorkom   +24 more
doaj   +1 more source

Detecting Multiplanetary Systems with Gravitational Microlensing and the Roman Space Telescope

The Astronomical Journal, 2023
It is plausible that most of the Stars in the Milky Way Galaxy, like the Sun, consist of planetary systems, instead of a single planet. Out of the estimately discovered 3980 planet-hosting stars, about 860 of them are known to be multiplanetary systems ...
Hossein Fatheddin, Sedighe Sajadian
doaj   +1 more source

Exoplanet detection in starshade images [PDF]

Journal of Astronomical Telescopes Instruments and Systems, 2021
A starshade suppresses starlight by a factor of 1011 in the image plane of a telescope, which is crucial for directly imaging Earth-like exoplanets.
M. Hu, A. Harness, He Sun, N. Kasdin
semanticscholar   +1 more source

A Six Year, Low-resolution, Multibroadband Transit Photometry Study of HD 189733b

The Astronomical Journal, 2022
Transmission spectroscopy offers an invaluable opportunity to characterize the atmospheres of exoplanets. We present new ground-based optical transmission spectra of the hot Jupiter HD 189733b, derived from nine transits observed over a six year time ...
Cristilyn N. Gardner-Watkins, Henry A. Kobulnicky, Hannah Jang-Condell, David H. Kasper, Brock A. Parker, Ted Bucci, Evan M. Cook, Kaitlin A. Doublestein, Cade Freels, Dax G. T. Galloway, Sabrina Helck, Corinne Komlodi, Michael J. Lindman, McKell Lyon, Ashley N. Piccone, Samantha Wilkerson   +15 more
doaj   +1 more source

Three Warm Jupiters around Solar-analog Stars Detected with TESS

The Astronomical Journal, 2023
We report the discovery and characterization of three giant exoplanets orbiting solar-analog stars, detected by the TESS space mission and confirmed through ground-based photometry and radial velocity measurements taken at La Silla observatory with FEROS.
Jan Eberhardt, Melissa J. Hobson, Thomas Henning, Trifon Trifonov, Rafael Brahm, Nestor Espinoza, Andrés Jordán, Daniel Thorngren, Remo Burn, Felipe I. Rojas, Paula Sarkis, Martin Schlecker, Marcelo Tala Pinto, Khalid Barkaoui, Richard P. Schwarz, Olga Suarez, Tristan Guillot, Amaury H. M. J. Triaud, Maximilian N. Günther, Lyu Abe, Gavin Boyle, Rodrigo Leiva, Vincent Suc, Phil Evans, Nick Dunckel, Carl Ziegler, Ben Falk, William Fong, Alexander Rudat, Avi Shporer, Stephanie Striegel, David Watanabe, Jon M. Jenkins, Sara Seager, Joshua N. Winn   +34 more
doaj   +1 more source

The Exoplanet Population Observation Simulator. II -- Population Synthesis in the Era of Kepler [PDF]

, 2019
The collection of planetary system properties derived from large surveys such as Kepler provides critical constraints on planet formation and evolution.
Apai, Daniel, Ciesla, Fred J., Emsenhuber, Alexandre, Mordasini, Christoph, Mulders, Gijs D., Pascucci, Ilaria   +5 more
core   +3 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

Variability of Known Exoplanet Host Stars Observed by TESS

The Astronomical Journal, 2023
Both direct and indirect methods of exoplanet detection rely upon detailed knowledge of the potential host stars. Such stellar characterization allows for accurate extraction of planetary properties, as well as contributing to our overall understanding ...
Emilie R. Simpson, Tara Fetherolf, Stephen R. Kane, Joshua Pepper, Teo Močnik, Paul A. Dalba   +5 more
doaj   +1 more source

Assessing telluric correction methods for Na detections with high-resolution exoplanet transmission spectroscopy [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT Using high-resolution ground-based transmission spectroscopy to probe exoplanetary atmospheres is difficult due to the inherent telluric contamination from absorption in Earth’s atmosphere. A variety of methods have previously been used to remove telluric features in the optical regime and calculate the planetary transmission ...
Adam B Langeveld, Nikku Madhusudhan, Samuel H C Cabot, Simon T Hodgkin   +3 more
openaire   +2 more sources

Optimal method for exoplanet detection by spectral and angular differential imaging [PDF]

SPIE Proceedings, 2010
ABSTRACT In the context of the SPHERE planet “nder project, we further develop and characterize a recently proposedmethod for the ecient direct detection of exoplanets f rom the ground using spectral and angular dierentialimaging. The method, called ANDROMEDA, combines images appropriately into pseudo-dataŽ, then uses allof them in a Maximum ...
Cornia, A., Mugnier, L. M., Mouillet, D., Vigan, Arthur, Eggenberger, A., Rousset, G., Boccaletti, A., Carbillet, M., Dohlen, K., Fusco, T., Carson, J., Montagnier, G.   +11 more
openaire   +3 more sources