Results 31 to 40 of about 213 (136)

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

TESS Giants Transiting Giants. III. An Eccentric Warm Jupiter Supports a Period−Eccentricity Relation for Giant Planets Transiting Evolved Stars

The Astronomical Journal, 2023
The fate of planets around rapidly evolving stars is not well understood. Previous studies have suggested that, relative to the main-sequence population, planets transiting evolved stars ( P < 100 days) tend to have more eccentric orbits. Here we present
Samuel K. Grunblatt, Nicholas Saunders, Ashley Chontos, Soichiro Hattori, Dimitri Veras, Daniel Huber, Ruth Angus, Malena Rice, Katelyn Breivik, Sarah Blunt, Steven Giacalone, Jack Lubin, Howard Isaacson, Andrew W. Howard, David R. Ciardi, Boris S. Safonov, Ivan A. Strakhov, David W. Latham, Allyson Bieryla, George R. Ricker, Jon M. Jenkins, Peter Tenenbaum, Avi Shporer, Edward H. Morgan, Veselin Kostov, Hugh P. Osborn, Diana Dragomir, Sara Seager, Roland K. Vanderspek, Joshua N. Winn   +29 more
doaj   +1 more source

Knudsen effusion mass spectrometry: Current and future approaches

Rapid Communications in Mass Spectrometry, Volume 38, Issue 14, 30 July 2024.
Rationale Knudsen effusion mass spectrometry (KEMS) has been a powerful tool in physical chemistry since 1954. There are many excellent reviews of the basic principles of KEMS in the literature. In this review, we focus on the current status and potential growth areas for this instrumental technique.
Nathan S. Jacobson, Jean‐Yves Colle, Valentina Stolyarova, Torsten Markus, Ioana Nuta   +4 more
wiley   +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

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

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

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

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

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

The Gap–Giant Association: Are Planets Hiding in the Gaps?

The Astrophysical Journal
A handful of stars are known to host both an inner system of multiple transiting planets and an outer giant planet. These systems all feature a prominent gap between the orbits of two of the transiting planets, distinguishing them from typical ...
Caleb Lammers, Joshua N. Winn
doaj   +1 more source