Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Michael Greklek-Mckeon"'
Autor:
Judith Korth, Priyanka Chaturvedi, Hannu Parviainen, Ilaria Carleo, Michael Endl, Eike W. Guenther, Grzegorz Nowak, Carina M. Persson, Phillip J. MacQueen, Alexander J. Mustill, Juan Cabrera, William D. Cochran, Jorge Lillo-Box, David Hobbs, Felipe Murgas, Michael Greklek-McKeon, Hanna Kellermann, Guillaume Hébrard, Akihiko Fukui, Enric Pallé, Jon M. Jenkins, Joseph D. Twicken, Karen A. Collins, Samuel N. Quinn, Ján Šubjak, Paul G. Beck, Davide Gandolfi, Savita Mathur, Hans J. Deeg, David W. Latham, Simon Albrecht, David Barrado, Isabelle Boisse, Hervé Bouy, Xavier Delfosse, Olivier Demangeon, Rafael A. García, Artie P. Hatzes, Neda Heidari, Kai Ikuta, Petr Kabáth, Heather A. Knutson, John Livingston, Eder Martioli, María Morales-Calderón, Giuseppe Morello, Norio Narita, Jaume Orell-Miquel, Hanna L. M. Osborne, Dinil B. Palakkatharappil, Viktoria Pinter, Seth Redfield, Howard M. Relles, Richard P. Schwarz, Sara Seager, Avi Shporer, Marek Skarka, Gregor Srdoc, Monika Stangret, Luis Thomas, Vincent Van Eylen, Noriharu Watanabe, Joshua N. Winn
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 2, p L28 (2024)
We report the discovery and characterization of a small planet, TOI-1408 c, on a 2.2 day orbit located interior to a previously known hot Jupiter, TOI-1408 b ( P = 4.42 days, M = 1.86 ± 0.02 M _Jup , R = 2.4 ± 0.5 R _Jup ) that exhibits grazing tra
Externí odkaz:
https://doaj.org/article/bd9a4751ba304fe8acac0d46be3bce19
Autor:
Daniel Huber, Ditte Slumstrup, Marc Hon, Yaguang Li, Victor Aguirre Børsen-Koch, Timothy R. Bedding, Meridith Joyce, J. M. Joel Ong, Aldo Serenelli, Dennis Stello, Travis Berger, Samuel K. Grunblatt, Michael Greklek-McKeon, Teruyuki Hirano, Evan N. Kirby, Marc H. Pinsonneault, Arthur Alencastro Puls, Joel Zinn
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 19 (2024)
Very-metal-poor stars ([Fe/H] < −2) are important laboratories for testing stellar models and reconstructing the formation history of our galaxy. Asteroseismology is a powerful tool to probe stellar interiors and measure ages, but few asteroseismic
Externí odkaz:
https://doaj.org/article/e1d61a80d324407db25531d357087a73
Autor:
Fei Dai, Andrew W. Howard, Samuel Halverson, Jaume Orell-Miquel, Enric Pallé, Howard Isaacson, Benjamin Fulton, Ellen M. Price, Mykhaylo Plotnykov, Leslie A. Rogers, Diana Valencia, Kimberly Paragas, Michael Greklek-McKeon, Jonathan Gomez Barrientos, Heather A. Knutson, Erik A. Petigura, Lauren M. Weiss, Rena Lee, Casey L. Brinkman, Daniel Huber, Gumundur Stefánsson, Kento Masuda, Steven Giacalone, Cicero X. Lu, Edwin S. Kite, Renyu Hu, Eric Gaidos, Michael Zhang, Ryan A. Rubenzahl, Joshua N. Winn, Te Han, Corey Beard, Rae Holcomb, Aaron Householder, Gregory J. Gilbert, Jack Lubin, J. M. Joel Ong, Alex S. Polanski, Nicholas Saunders, Judah Van Zandt, Samuel W. Yee, Jingwen Zhang, Jon Zink, Bradford Holden, Ashley Baker, Max Brodheim, Ian J. M. Crossfield, William Deich, Jerry Edelstein, Steven R. Gibson, Grant M. Hill, Sharon R Jelinsky, Marc Kassis, Russ R. Laher, Kyle Lanclos, Scott Lilley, Joel N. Payne, Kodi Rider, Paul Robertson, Arpita Roy, Christian Schwab, Abby P. Shaum, Martin M. Sirk, Chris Smith, Adam Vandenberg, Josh Walawender, Sharon X. Wang, Shin-Ywan (Cindy) Wang, Edward Wishnow, Jason T. Wright, Sherry Yeh, José A. Caballero, Juan C. Morales, Felipe Murgas, Evangelos Nagel, Ansgar Reiners, Andreas Schweitzer, Hugo M. Tabernero, Mathias Zechmeister, Alton Spencer, David R. Ciardi, Catherine A. Clark, Michael B. Lund, Douglas A. Caldwell, Karen A. Collins, Richard P. Schwarz, Khalid Barkaoui, Cristilyn Watkins, Avi Shporer, Norio Narita, Akihiko Fukui, Gregor Srdoc, David W. Latham, Jon M. Jenkins, George R. Ricker, Sara Seager, Roland Vanderspek
Publikováno v:
The Astronomical Journal, Vol 168, Iss 3, p 101 (2024)
TOI-6255 b (GJ 4256) is an Earth-sized planet (1.079 ± 0.065 R _⊕ ) with an orbital period of only 5.7 hr. With the newly commissioned Keck Planet Finder and CARMENES spectrographs, we determine the planet’s mass to be 1.44 ± 0.14 M _⊕ . The
Externí odkaz:
https://doaj.org/article/0984db33703e4dd29fc69e546aaae69a
Autor:
W. Garrett Levine, Shreyas Vissapragada, Adina D. Feinstein, George W. King, Aleck Hernandez, Lía Corrales, Michael Greklek-McKeon, Heather A. Knutson
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 65 (2024)
Aeronomy, the study of Earth’s upper atmosphere and its interaction with the local space environment, has long traced changes in the thermospheres of Earth and other solar system planets to solar variability in the X-ray and extreme-ultraviolet (co
Externí odkaz:
https://doaj.org/article/1d574615dd3248689cb40a5e5fba837b
Autor:
Benjamin J. Hord, Eliza M.-R. Kempton, Thomas M. Evans-Soma, David W. Latham, David R. Ciardi, Diana Dragomir, Knicole D. Colón, Gabrielle Ross, Andrew Vanderburg, Zoe L. de Beurs, Karen A. Collins, Cristilyn N. Watkins, Jacob Bean, Nicolas B. Cowan, Tansu Daylan, Caroline V. Morley, Jegug Ih, David Baker, Khalid Barkaoui, Natalie M. Batalha, Aida Behmard, Alexander Belinski, Zouhair Benkhaldoun, Paul Benni, Krzysztof Bernacki, Allyson Bieryla, Avraham Binnenfeld, Pau Bosch-Cabot, François Bouchy, Valerio Bozza, Rafael Brahm, Lars A. Buchhave, Michael Calkins, Ashley Chontos, Catherine A. Clark, Ryan Cloutier, Marion Cointepas, Kevin I. Collins, Dennis M. Conti, Ian J. M. Crossfield, Fei Dai, Jerome P. de Leon, Georgina Dransfield, Courtney Dressing, Adam Dustor, Gilbert Esquerdo, Phil Evans, Sergio B. Fajardo-Acosta, Jerzy Fiołka, Raquel Forés-Toribio, Antonio Frasca, Akihiko Fukui, Benjamin Fulton, Elise Furlan, Tianjun Gan, Davide Gandolfi, Mourad Ghachoui, Steven Giacalone, Emily A. Gilbert, Michaël Gillon, Eric Girardin, Erica Gonzales, Ferran Grau Horta, Joao Gregorio, Michael Greklek-McKeon, Pere Guerra, J. D. Hartman, Coel Hellier, Ian Helm, Krzysztof G. Hełminiak, Thomas Henning, Michelle L. Hill, Keith Horne, Andrew W. Howard, Steve B. Howell, Daniel Huber, Giovanni Isopi, Emmanuel Jehin, Jon M. Jenkins, Eric L. N. Jensen, Marshall C. Johnson, Andrés Jordán, Stephen R. Kane, John F. Kielkopf, Vadim Krushinsky, Sławomir Lasota, Elena Lee, Pablo Lewin, John H. Livingston, Jack Lubin, Michael B. Lund, Franco Mallia, Christopher R. Mann, Giuseppi Marino, Nataliia Maslennikova, Bob Massey, Rachel Matson, Elisabeth Matthews, Andrew W. Mayo, Tsevi Mazeh, Kim K. McLeod, Edward J. Michaels, Teo Močnik, Mayuko Mori, Georgia Mraz, Jose A. Muñoz, Norio Narita, Krupa Natarajan, Louise Dyregaard Nielsen, Hugh Osborn, Enric Palle, Aviad Panahi, Riccardo Papini, Peter Plavchan, Alex S. Polanski, Adam Popowicz, Francisco J. Pozuelos, Samuel N. Quinn, Don J. Radford, Phillip A. Reed, Howard M. Relles, Malena Rice, Paul Robertson, Joseph E. Rodriguez, Lee J. Rosenthal, Ryan A. Rubenzahl, Nicole Schanche, Joshua Schlieder, Richard P. Schwarz, Ramotholo Sefako, Avi Shporer, Alessandro Sozzetti, Gregor Srdoc, Chris Stockdale, Alexander Tarasenkov, Thiam-Guan Tan, Mathilde Timmermans, Eric B. Ting, Judah Van Zandt, JP Vignes, Ian Waite, Noriharu Watanabe, Lauren M. Weiss, Justin Wittrock, George Zhou, Carl Ziegler, Shay Zucker
Publikováno v:
The Astronomical Journal, Vol 167, Iss 5, p 233 (2024)
JWST has ushered in an era of unprecedented ability to characterize exoplanetary atmospheres. While there are over 5000 confirmed planets, more than 4000 Transiting Exoplanet Survey Satellite (TESS) planet candidates are still unconfirmed and many of
Externí odkaz:
https://doaj.org/article/17158951587f4d0cb5604fc233cfc246
Autor:
Jorge Pérez-González, Michael Greklek-McKeon, Shreyas Vissapragada, Morgan Saidel, Heather A. Knutson, Dion Linssen, Antonija Oklopčić
Publikováno v:
The Astronomical Journal, Vol 167, Iss 5, p 214 (2024)
Photoevaporative mass-loss rates are expected to be highest when planets are young and the host star is more active, but to date there have been relatively few measurements of mass-loss rates for young gas giant exoplanets. In this study we measure t
Externí odkaz:
https://doaj.org/article/5f301d5bedce460f988e50d96c640f46
Autor:
Shreyas Vissapragada, Michael Greklek-McKeon, Dion Linssen, Morgan MacLeod, Daniel P. Thorngren, Peter Gao, Heather A. Knutson, David W. Latham, Mercedes López-Morales, Antonija Oklopčić, Jorge Pérez González, Morgan Saidel, Abigail Tumborang, Stephanie Yoshida
Publikováno v:
The Astronomical Journal, Vol 167, Iss 5, p 199 (2024)
Superpuffs are planets with exceptionally low densities ( ρ ≲ 0.1 g cm ^−3 ) and core masses ( M _c ≲ 5 M _⊕ ). Many lower-mass ( M _p ≲ 10 M _⊕ ) superpuffs are expected to be unstable to catastrophic mass loss via photoevaporation and/
Externí odkaz:
https://doaj.org/article/befb1ce6c87345458df59c4c423d829f
Autor:
Michael Greklek-McKeon, Heather A. Knutson, Shreyas Vissapragada, Daniel Jontof-Hutter, Yayaati Chachan, Daniel Thorngren, Gautam Vasisht
Publikováno v:
The Astronomical Journal, Vol 165, Iss 2, p 48 (2023)
Kepler-289 is a three-planet system containing two sub-Neptunes and one cool giant planet orbiting a young, Sun-like star. All three planets exhibit transit timing variations (TTVs), with both adjacent planet pairs having orbital periods close to the
Externí odkaz:
https://doaj.org/article/a5d727fce39441e2a4eb376632631cdd
Autor:
Fei Dai, Kento Masuda, Corey Beard, Paul Robertson, Max Goldberg, Konstantin Batygin, Luke Bouma, Jack J. Lissauer, Emil Knudstrup, Simon Albrecht, Andrew W. Howard, Heather A. Knutson, Erik A. Petigura, Lauren M. Weiss, Howard Isaacson, Martti Holst Kristiansen, Hugh Osborn, Songhu Wang, Xian-Yu Wang, Aida Behmard, Michael Greklek-McKeon, Shreyas Vissapragada, Natalie M. Batalha, Casey L. Brinkman, Ashley Chontos, Ian Crossfield, Courtney Dressing, Tara Fetherolf, Benjamin Fulton, Michelle L. Hill, Daniel Huber, Stephen R. Kane, Jack Lubin, Mason MacDougall, Andrew Mayo, Teo Močnik, Joseph M. Akana Murphy, Ryan A. Rubenzahl, Nicholas Scarsdale, Dakotah Tyler, Judah Van Zandt, Alex S. Polanski, Hans Martin Schwengeler, Ivan A. Terentev, Paul Benni, Allyson Bieryla, David Ciardi, Ben Falk, E. Furlan, Eric Girardin, Pere Guerra, Katharine M. Hesse, Steve B. Howell, J. Lillo-Box, Elisabeth C. Matthews, Joseph D. Twicken, Joel Villaseñor, David W. Latham, Jon M. Jenkins, George R. Ricker, Sara Seager, Roland Vanderspek, Joshua N. Winn
Publikováno v:
The Astronomical Journal, Vol 165, Iss 2, p 33 (2023)
Convergent disk migration has long been suspected to be responsible for forming planetary systems with a chain of mean-motion resonances (MMRs). Dynamical evolution over time could disrupt the delicate resonant configuration. We present TOI-1136, a 7
Externí odkaz:
https://doaj.org/article/170b4ba8291c483d9b8fb10bb0173bba
Autor:
Ennio R. Sanchez, Andrew T. Powis, Igor D. Kaganovich, Robert Marshall, Peter Porazik, Jay Johnson, Michael Greklek-Mckeon, Kailas S. Amin, David Shaw, Michael Nicolls
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 6 (2019)
The Sun's connection with the Earth's magnetic field and atmosphere is carried out through the exchange of electromagnetic and mass flux and is regulated by a complex interconnection of processes. During space weather events, solar flares, or fast st
Externí odkaz:
https://doaj.org/article/3d49e548b66241af8fa6bd2772176331