Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Exoplanet migration"'
Autor:
Mary Anne Limbach, Andrew Vanderburg, Alexander Venner, Simon Blouin, Kevin B. Stevenson, Ryan J. MacDonald, Sydney Jenkins, Rachel Bowens-Rubin, Melinda Soares-Furtado, Caroline Morley, Markus Janson, John Debes, Siyi Xu, Evangelia Kleisioti, Matthew Kenworthy, Paul Butler, Jeffrey D. Crane, Dave Osip, Stephen Shectman, Johanna Teske
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 1, p L11 (2024)
The MIRI Exoplanets Orbiting White dwarfs survey is a cycle 2 JWST program to search for exoplanets around dozens of nearby white dwarfs via infrared excess and direct imaging. In this Letter, we present the detection of mid-infrared excess at 18 and
Externí odkaz:
https://doaj.org/article/cb3906893d87432a94f49924b12b41c0
Autor:
Ryan A. Rubenzahl, Andrew W. Howard, Samuel Halverson, Cristobal Petrovich, Isabel Angelo, Guđmundur Stefánsson, Fei Dai, Aaron Householder, Benjamin Fulton, Steven R. Gibson, Arpita Roy, Abby P. Shaum, Howard Isaacson, Max Brodheim, William Deich, Grant M. Hill, Bradford Holden, Daniel Huber, Russ R. Laher, Kyle Lanclos, Joel N. Payne, Erik A. Petigura, Christian Schwab, Josh Walawender, Sharon X. Wang, Lauren M. Weiss, Joshua N. Winn, Jason T. Wright
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 2, p L40 (2024)
The orbits of close-in exoplanets provide clues to their formation and evolutionary history. Many close-in exoplanets likely formed far out in their protoplanetary disks and migrated to their current orbits, perhaps via high-eccentricity migration (H
Externí odkaz:
https://doaj.org/article/234d08d633ca4ccf9582f2e68d559638
Autor:
Fei Dai, Max Goldberg, Konstantin Batygin, Jennifer van Saders, Eugene Chiang, Nick Choksi, Rixin Li, Erik A. Petigura, Gregory J. Gilbert, Sarah C. Millholland, Yuan-Zhe Dai, Luke Bouma, Lauren M. Weiss, Joshua N. Winn
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 239 (2024)
Multiple planets undergoing disk migration may be captured into a chain of mean-motion resonances with the innermost planet parked near the disk’s inner edge. Subsequent dynamical evolution may disrupt these resonances, leading to the nonresonant c
Externí odkaz:
https://doaj.org/article/25f6219c8aa64a58874ed2efc1bd5ecf
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 151 (2024)
The elemental and isotopic abundances of volatiles like carbon, oxygen, and nitrogen may trace a planet’s formation location relative to H _2 O, CO _2 , CO, NH _3 , and N _2 “snowlines,” or the distance from the star at which these volatile ele
Externí odkaz:
https://doaj.org/article/04fdc6fd18b24c4d833aca9520c0cadc
Autor:
Steven Giacalone, Fei Dai, J. J. Zanazzi, Andrew W. Howard, Courtney D. Dressing, Joshua N. Winn, Ryan A. Rubenzahl, Theron W. Carmichael, Noah Vowell, Aurora Kesseli, Samuel Halverson, Howard Isaacson, Max Brodheim, William Deich, Benjamin J. Fulton, Steven R. Gibson, Grant M. Hill, Bradford Holden, Aaron Householder, Stephen Kaye, Russ R. Laher, Kyle Lanclos, Joel Payne, Erik A. Petigura, Arpita Roy, Christian Schwab, Abby P. Shaum, Martin M. Sirk, Chris Smith, Guðmundur Stefánsson, Josh Walawender, Sharon X. Wang, Lauren M. Weiss, Sherry Yeh
Publikováno v:
The Astronomical Journal, Vol 168, Iss 5, p 189 (2024)
We introduce the OATMEAL survey, an effort to measure the obliquities of stars with transiting brown dwarf companions. We observed a transit of the close-in ( P _orb = 1.74 days) brown dwarf GPX-1 b using the Keck Planet Finder spectrograph to measur
Externí odkaz:
https://doaj.org/article/b908db9969b947f68699f93e2781be78
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 159 (2024)
WASP-107 b seems to be a poster child of the long-suspected high-eccentricity migration scenario. It is on a 5.7 day, polar orbit. The planet is Jupiter-like in radius but Neptune-like in mass with exceptionally low density. WASP-107 c is on a 1100 d
Externí odkaz:
https://doaj.org/article/f98730b2963643c387ec18eaf79579a1
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 130 (2024)
Migration commonly occurs during the epoch of planet formation. For emerging gas giant planets, it proceeds concurrently with their growth through the accretion of gas from their natal protoplanetary disks. A similar migration process should also be
Externí odkaz:
https://doaj.org/article/a4a9e067e0fc459db4523522c6f6b188
Publikováno v:
The Astronomical Journal, Vol 168, Iss 3, p 109 (2024)
Exoplanet systems are thought to evolve on secular timescales over billions of years. This evolution is impossible to directly observe on human timescales in most individual systems. While the availability of accurate and precise age inferences for i
Externí odkaz:
https://doaj.org/article/66e63dac810847159799d7fa3b3d6013
Autor:
Nicholas Saunders, Samuel K. Grunblatt, Ashley Chontos, Fei Dai, Daniel Huber, Jingwen Zhang, Guđmundur Stefánsson, Jennifer L. van Saders, Joshua N. Winn, Daniel Hey, Andrew W. Howard, Benjamin Fulton, Howard Isaacson, Corey Beard, Steven Giacalone, Judah Van Zandt, Joseph M. Akana Murphey, Malena Rice, Sarah Blunt, Emma Turtelboom, Paul A. Dalba, Jack Lubin, Casey Brinkman, Emma M. Louden, Emma Page, Cristilyn N. Watkins, Karen A. Collins, Chris Stockdale, Thiam-Guan Tan, Richard P. Schwarz, Bob Massey, Steve B. Howell, Andrew Vanderburg, George R. Ricker, Jon M. Jenkins, Sara Seager, Jessie L. Christiansen, Tansu Daylan, Ben Falk, Max Brodheim, Steven R. Gibson, Grant M. Hill, Bradford Holden, Aaron Householder, Stephen Kaye, Russ R. Laher, Kyle Lanclos, Erik A. Petigura, Arpita Roy, Ryan A. Rubenzahl, Christian Schwab, Abby P. Shaum, Martin M. Sirk, Christopher L. Smith, Josh Walawender, Sherry Yeh
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 81 (2024)
The degree of alignment between a star’s spin axis and the orbital plane of its planets (the stellar obliquity) is related to interesting and poorly understood processes that occur during planet formation and evolution. Hot Jupiters orbiting hot st
Externí odkaz:
https://doaj.org/article/5262b598be15457b9a2c9154dee4481f
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 2, p 133 (2024)
Orbital evolution is a critical process that sculpts planetary systems, particularly during their early stages where planet–disk interactions are expected to lead to the formation of resonant chains. Despite the theoretically expected prominence of
Externí odkaz:
https://doaj.org/article/83fcc8c66d3b435a84cf785e2a73cefb