Results 41 to 50 of about 372,922 (156)

A Self‐Consistent Model of Radial Transport in the Magnetodisks of Gas Giants Including Interhemispheric Asymmetries

Journal of Geophysical Research: Space Physics, Volume 129, Issue 4, April 2024.
Abstract Outward transport of plasma in the inner and middle magnetospheres of gas giants results from an interplay between mass loading from the inner dominant mass sources (volcanic moons), flux tube interchange in the centrifugally unstable magnetospheric plasma disk, turbulent heating of the plasma, and coupling between the equatorial plasma and ...
Marie Devinat, Michel Blanc, Nicolas André   +2 more
wiley   +1 more source

The Radiative Effects of Photochemical Hazes on the Atmospheric Circulation and Phase Curves of Sub-Neptunes

The Astrophysical Journal
Measuring the atmospheric composition of hazy sub-Neptunes like GJ 1214b through transmission spectroscopy is difficult because of the degeneracy between mean molecular weight (MMW) and haziness.
Maria E. Steinrueck, Vivien Parmentier, Laura Kreidberg, Peter Gao, Eliza M.-R. Kempton, Michael Zhang, Kevin B. Stevenson, Isaac Malsky, Michael T. Roman, Emily Rauscher, Matej Malik, Roxana Lupu, Tiffany Kataria, Anjali A. A. Piette, Jacob L. Bean, Matthew C. Nixon   +15 more
doaj   +1 more source

Exomoon Phase Curves: Toroidal Exosphere Simulations of Exo‐Ios Orbiting 8 Exoplanets in Alkali Spectroscopy

Journal of Geophysical Research: Planets, Volume 129, Issue 3, March 2024.
Abstract Toroidal atmospheres and exospheres characterized at exoplanets may be fueled by volcanically active exomoons, often referred to as exo‐Ios. We study the neutral outgassing and volatile evolution of a close‐orbiting, evaporating satellite at eight candidate exoplanet‐exomoon systems WASP‐49,‐96,‐69,‐17 b, XO‐2N b, HAT‐P‐1 b, HD‐189733 b, and ...
M. Meyer zu Westram, A. V. Oza, A. Galli
wiley   +1 more source

Using dimers to measure biosignatures and atmospheric pressure for terrestrial exoplanets [PDF]

, 2014
We present a new method to probe atmospheric pressure on Earth-like planets using (O-O) dimers in the near-infrared. We also show that dimer features could be the most readily detectable biosignatures for Earth-like atmospheres and may even be detectable
Misra, A., Meadows, V., Claire, M., Crisp, D.   +3 more
core   +1 more source

Confirming the Warm and Dense Sub-Saturn TIC 139270665 b with the Automated Planet Finder and Unistellar Citizen Science Network

The Astronomical Journal
We report the discovery and confirmation of the Transiting Exoplanet Survey Satellite (TESS) single-transit, warm and dense sub-Saturn, TIC 139270665 b. This planet is unusually dense for its size: with a bulk density of 2.13 g cm ^−3 (0.645 R _J , 0.463
Daniel O’Conner Peluso, Paul A. Dalba, Duncan Wright, Thomas M. Esposito, Lauren A. Sgro, Ian C. Weaver, Franck Marchis, Diana Dragomir, Steven Villanueva Jr., Benjamin Fulton, Howard Isaacson, Arvind F. Gupta, Thomas Lee Jacobs, Daryll M. LaCourse, Robert Gagliano, Martti H. Kristiansen, Mark Omohundro, Hans M. Schwengeler, Ivan A. Terentev, Andrew Vanderburg, Ananya Balakrishnan, Divya Bhamidipati, Marco Hovland, Serina Jain, Nathan Jay, Hanna Johnson, Aditya Kapur, Jonah Morgan, Josephine Oesterer, Richard Purev, Dean Ramos, Christopher Seo, Vibha Sriramkumar, Naina Srivastava, Astha Verma, Olivia Woo, Steven Adkinson, Keiichi Fukui, Patrice Girard, Tateki Goto, Bruno Guillet, Des Janke, Andre Katterfeld, Rachel Knight, David Koster, Ryuichi Kukita, Eric Lawson, Liouba Leroux, Niniane Leroux, Chelsey Logan, Margaret A. Loose, Nicola Meneghelli, Eric Oulevey, Bruce Parker, Stephen Price, Michael Primm, Justus Randolph, Robert Savonnet, Masao Shimizu, Petri Tikkanen, Stefan Will, Neil Yoblonsky, Wai-Chun Yue   +62 more
doaj   +1 more source

Spectroscopically Resolved Partial Phase Curve of the Rapid Heating and Cooling of the Highly Eccentric Hot Jupiter HAT-P-2b with WFC3

The Astronomical Journal
The extreme environments of transiting close-in exoplanets in highly eccentric orbits are ideal for testing exoclimate physics. Spectroscopically resolved phase curves not only allow for the characterization of their thermal response to irradiation ...
Bob Jacobs, Jean-Michel Désert, Nikole Lewis, Ryan C. Challener, L. C. Mayorga, Zoë L. de Beurs, Vivien Parmentier, Kevin B. Stevenson, Julien de Wit, Saugata Barat, Jonathan Fortney, Tiffany Kataria, Michael Line   +12 more
doaj   +1 more source

No Evidence for a Metallicity-dependent Enhancement of Distant Giant Companions to Close-in Small Planets in the California Legacy Survey

The Astronomical Journal
Understanding the relationship between close-in small (CS) planets and distant giants (DGs) is central to understanding the formation of planetary systems like our own.
Judah Van Zandt, Erik A. Petigura
doaj   +1 more source

TESS-Keck Survey. XIV. Two Giant Exoplanets from the Distant Giants Survey

The Astronomical Journal, 2023
We present the Distant Giants Survey, a three-year radial velocity campaign to measure P(DG∣CS), the conditional occurrence of distant giant planets (DG; M _p ∼ 0.3–13 M _J , P > 1 yr) in systems hosting a close-in small planet (CS; R _p < 10 R _⊕ ). For
Judah Van Zandt, Erik A. Petigura, Mason MacDougall, Gregory J. Gilbert, Jack Lubin, Thomas Barclay, Natalie M. Batalha, Ian J. M. Crossfield, Courtney Dressing, Benjamin Fulton, Andrew W. Howard, Daniel Huber, Howard Isaacson, Stephen R. Kane, Paul Robertson, Arpita Roy, Lauren M. Weiss, Aida Behmard, Corey Beard, Ashley Chontos, Fei Dai, Paul A. Dalba, Tara Fetherolf, Steven Giacalone, Christopher E. Henze, Michelle L. Hill, Lea A. Hirsch, Rae Holcomb, Steve B. Howell, Jon M. Jenkins, David W. Latham, Andrew Mayo, Ismael Mireles, Teo Močnik, Joseph M. Akana Murphy, Daria Pidhorodetska, Alex S. Polanski, George R. Ricker, Lee J. Rosenthal, Ryan A. Rubenzahl, S. Seager, Nicholas Scarsdale, Emma V. Turtelboom, Roland Vanderspek, Joshua N. Winn   +44 more
doaj   +1 more source

GEMS JWST: Transmission Spectroscopy of TOI-5205b Reveals Significant Stellar Contamination and a Metal-poor Atmosphere

The Astronomical Journal
Recent discoveries of transiting giant exoplanets ( R _p  ≳ 8 R _⊕ ) around M dwarfs present an opportunity to investigate their atmospheric compositions and explore how such massive planets form around low-mass stars contrary to the prediction from ...
Caleb I. Cañas, Jacob Lustig-Yaeger, Shang-Min Tsai, Simon Müller, Ravit Helled, Shubham Kanodia, Dana R. Louie, Giannina Guzmán Caloca, Peter Gao, Jessica Libby-Roberts, Kevin K. Hardegree-Ullman, Knicole D. Colón, Ian Czekala, Megan Delamer, Te Han, Andrea S.J. Lin, Suvrath Mahadevan, Erin M. May, Joe P. Ninan, Anjali A. A. Piette, Guðmundur Stefánsson, Kevin B. Stevenson, Johanna Teske, Nicole L. Wallack   +23 more
doaj   +1 more source

Rotation Periods, Inclinations, and Obliquities of Cool Stars Hosting Directly Imaged Substellar Companions: Spin–Orbit Misalignments Are Common

The Astronomical Journal, 2023
The orientation between a star’s spin axis and a planet’s orbital plane provides valuable information about the system’s formation and dynamical history. For non-transiting planets at wide separations, true stellar obliquities are challenging to measure,
Brendan P. Bowler, Quang H. Tran, Zhoujian Zhang, Marvin Morgan, Katelyn B. Ashok, Sarah Blunt, Marta L. Bryan, Analis E. Evans, Kyle Franson, Daniel Huber, Vighnesh Nagpal, Ya-Lin Wu, Yifan Zhou   +12 more
doaj   +1 more source