Zobrazeno 1 - 10
of 289
pro vyhledávání: '"M Dwarf Stars"'
Autor:
N. Hurley-Walker, S. J. McSweeney, A. Bahramian, N. Rea, C. Horváth, S. Buchner, A. Williams, B. W. Meyers, Jay Strader, Elias Aydi, Ryan Urquhart, Laura Chomiuk, T. J. Galvin, F. Coti Zelati, Matthew Bailes
Publikováno v:
The Astrophysical Journal Letters, Vol 976, Iss 2, p L21 (2024)
We present a long-period radio transient (GLEAM-X J0704−37) discovered to have an optical counterpart, consistent with a cool main-sequence star of spectral type M3. The radio periodicity occurs at the longest period yet found, 2.9 hr, and was disc
Externí odkaz:
https://doaj.org/article/c0356a4b27c74409a5b195f99c0cf720
Autor:
Fatemeh Davoudi, Benjamin V. Rackham, Michaël Gillon, Julien de Wit, Adam J. Burgasser, Laetitia Delrez, Aishwarya Iyer, Elsa Ducrot
Publikováno v:
The Astrophysical Journal Letters, Vol 970, Iss 1, p L4 (2024)
A comprehensive infrared spectroscopic study of star TRAPPIST-1 is a crucial step toward the detailed examination of its planets. While the presence of Earth’s atmosphere has limited the spectral extent of such a study up to now, the Near Infrared
Externí odkaz:
https://doaj.org/article/045a1a4f9cec44d1b5875e2373a1b59f
Autor:
Tianjun Gan, Sharon X. Wang, Fei Dai, Joshua N. Winn, Shude Mao, Siyi Xu, Enric Pallé, Jacob L. Bean, Madison Brady, Nina Brown, Cicero Lu, Rafael Luque, Teo Mocnik, Andreas Seifahrt, Guđmundur K. Stefánsson
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 1, p L24 (2024)
Measuring the obliquities of stars hosting giant planets may shed light on the dynamical history of planetary systems. Significant efforts have been made to measure the obliquities of FGK stars with hot Jupiters, mainly based on observations of the R
Externí odkaz:
https://doaj.org/article/6b3b9bce44514f2ea43df506c5244b0a
Autor:
Kellen Lawson, Joshua E. Schlieder, Jarron M. Leisenring, Ell Bogat, Charles A. Beichman, Geoffrey Bryden, András Gáspár, Tyler D. Groff, Michael W. McElwain, Michael R. Meyer, Thomas Barclay, Per Calissendorff, Matthew De Furio, Yiting Li, Marcia J. Rieke, Marie Ygouf, Thomas P. Greene, Julien H. Girard, Mario Gennaro, Jens Kammerer, Armin Rest, Thomas L. Roellig, Ben Sunnquist
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 1, p L8 (2024)
Observations of debris disks offer important insights into the formation and evolution of planetary systems. Though M dwarfs make up approximately 80% of nearby stars, very few M dwarf debris disks have been studied in detail—making it unclear how
Externí odkaz:
https://doaj.org/article/32b76b4fc6644912851c21d4123035a1
Autor:
Charles Cadieux, Mykhaylo Plotnykov, René Doyon, Diana Valencia, Farbod Jahandar, Lisa Dang, Martin Turbet, Thomas J. Fauchez, Ryan Cloutier, Collin Cherubim, Étienne Artigau, Neil J. Cook, Billy Edwards, Tim Hallatt, Benjamin Charnay, François Bouchy, Romain Allart, Lucile Mignon, Frédérique Baron, Susana C. C. Barros, Björn Benneke, B. L. Canto Martins, Nicolas B. Cowan, J. R. De Medeiros, Xavier Delfosse, Elisa Delgado-Mena, Xavier Dumusque, David Ehrenreich, Yolanda G. C. Frensch, J. I. González Hernández, Nathan C. Hara, David Lafrenière, Gaspare Lo Curto, Lison Malo, Claudio Melo, Dany Mounzer, Vera Maria Passeger, Francesco Pepe, Anne-Sophie Poulin-Girard, Nuno C. Santos, Danuta Sosnowska, Alejandro Suárez Mascareño, Simon Thibault, Valentina Vaulato, Gregg A. Wade, François Wildi
Publikováno v:
The Astrophysical Journal Letters, Vol 960, Iss 1, p L3 (2024)
The two-planet transiting system LHS 1140 has been extensively observed since its discovery in 2017, notably with Spitzer, HST, TESS, and ESPRESSO, placing strong constraints on the parameters of the M4.5 host star and its small temperate exoplanets,
Externí odkaz:
https://doaj.org/article/248184ef49024f78bbde20d84a848845
Autor:
Mayank Narang, Manoj Puravankara, H. K. Vedantham, C. H. Ishwara-Chandra, Ayanabha De, Himanshu Tyagi, Bihan Banerjee, Prasanta K. Nayak, Arun Surya, B. Shridharan, Vinod C. Pathak, Mihir Tripathi
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 265 (2024)
Coherent radio emission with properties similar to planetary auroral signals has been reported from GJ 1151, a quiescent, slow-rotating mid-M star, by the LOFAR Two-meter (120–170 MHz) Sky Survey. The observed LOFAR emission is fairly bright at 0.8
Externí odkaz:
https://doaj.org/article/ddc0411e0f664aa2b0eff5a9444b9c09
Autor:
Shubham Kanodia, Arvind F. Gupta, Caleb I. Cañas, Lia Marta Bernabò, Varghese Reji, Te Han, Madison Brady, Andreas Seifahrt, William D. Cochran, Nidia Morrell, Ritvik Basant, Jacob Bean, Chad F. Bender, Zoë L. de Beurs, Allyson Bieryla, Alexina Birkholz, Nina Brown, Franklin Chapman, David R. Ciardi, Catherine A. Clark, Ethan G. Cotter, Scott A. Diddams, Samuel Halverson, Suzanne Hawley, Leslie Hebb, Rae Holcomb, Steve B. Howell, Henry A. Kobulnicky, Adam F. Kowalski, Alexander Larsen, Jessica Libby-Roberts, Andrea S. J. Lin, Michael B. Lund, Rafael Luque, Andrew Monson, Joe P. Ninan, Brock A. Parker, Nishka Patel, Michael Rodruck, Gabrielle Ross, Arpita Roy, Christian Schwab, Guđmundur Stefánsson, Aubrie Thoms, Andrew Vanderburg
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 235 (2024)
Transiting giant exoplanets around M-dwarf stars (GEMS) are rare, owing to the low-mass host stars. However, the all-sky coverage of TESS has enabled the detection of an increasingly large number of them to enable statistical surveys like the Searchi
Externí odkaz:
https://doaj.org/article/2a03512dd6334e75b0de523e48d03ee5
Autor:
Fábio Wanderley, Katia Cunha, Verne V. Smith, Oleg Kochukhov, Diogo Souto, C. Allende Prieto, Suvrath Mahadevan, Steven R. Majewski, Philip S. Muirhead, Marc Pinsonneault, Ryan Terrien
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 109 (2024)
Stellar magnetic fields have a major impact on space weather around exoplanets orbiting low-mass stars. From an analysis of Zeeman-broadened Fe i lines measured in near-infrared SDSS/APOGEE spectra, mean magnetic fields are determined for a sample of
Externí odkaz:
https://doaj.org/article/5c2e229a99c94227a5f955e70cf7e376
Autor:
Joel D. Hartman, Daniel Bayliss, Rafael Brahm, Edward M. Bryant, Andrés Jordán, Gáspár Á. Bakos, Melissa J. Hobson, Elyar Sedaghati, Xavier Bonfils, Marion Cointepas, Jose Manuel Almenara, Khalid Barkaoui, Mathilde Timmermans, George Dransfield, Elsa Ducrot, Sebastián Zúñiga-Fernández, Matthew J. Hooton, Peter Pihlmann Pedersen, Francisco J. Pozuelos, Amaury H. M. J. Triaud, Michaël Gillon, Emmanuel Jehin, William C. Waalkes, Zachory K. Berta-Thompson, Steve B. Howell, Elise Furlan, George R. Ricker, Roland Vanderspek, Sara Seager, Joshua N. Winn, Jon M. Jenkins, David Rapetti, Karen A. Collins, David Charbonneau, Christopher J. Burke, David R. Rodriguez
Publikováno v:
The Astronomical Journal, Vol 168, Iss 5, p 202 (2024)
We present the discovery of TOI 762 A b and TIC 46432937 b, two giant planets transiting M-dwarf stars. Transits of both systems were first detected from observations by the NASA TESS mission, and the transiting objects are confirmed as planets throu
Externí odkaz:
https://doaj.org/article/8bd5ac4350724c1b8a27d3defc582515
Autor:
Edypo Melo, Diogo Souto, Katia Cunha, Verne V. Smith, Fábio Wanderley, Vinicius Grilo, Deusalete Camara, Kely Murta, Neda Hejazi, Ian J. M. Crossfield, Johanna Teske, Rafael Luque, Michael Zhang, Jacob Bean
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 90 (2024)
Exoplanets hosting M dwarfs are the best targets to characterize Earth-like or super-Earth planetary atmospheres with the James Webb Space Telescope (JWST). We determine detailed stellar parameters ( T _eff , log g , and ξ ) and individual abundance
Externí odkaz:
https://doaj.org/article/1113be45acd349f4a2a2498ed7769cce