Results 21 to 30 of about 2,269 (304)

Magnetic Field Measurements of Low-mass Stars from High-resolution Near-infrared IGRINS Spectra

The Astronomical Journal, 2023
We present average magnetic field measurements derived from high-resolution near-infrared IGRINS spectra of a carefully selected sample of 28 M dwarfs. All 28 have reported magnetic field strengths in the literature.
Eunkyu Han, Ricardo López-Valdivia, Gregory N. Mace, Daniel T. Jaffe   +3 more
doaj   +1 more source

Mass Production of 2021 KMTNet Microlensing Planets. III. Analysis of Three Giant Planets

The Astronomical Journal, 2022
We present the analysis of three more planets from the KMTNet 2021 microlensing season. KMT-2021-BLG-0119Lb is a ∼6 M _Jup planet orbiting an early M dwarf or a K dwarf, KMT-2021-BLG-0192Lb is a ∼2 M _Nep planet orbiting an M dwarf, and KMT-2021-BLG ...
In-Gu Shin, Jennifer C. Yee, Andrew Gould, Kyu-Ha Hwang, Hongjing Yang, Ian A. Bond, (Leading Authors), Michael D. Albrow, Sun-Ju Chung, Cheongho Han, Youn Kil Jung, Yoon-Hyun Ryu, Yossi Shvartzvald, Weicheng Zang, Sang-Mok Cha, Dong-Jin Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, (The KMTNet Collaboration), Fumio Abe, Richard Barry, David P. Bennett, Aparna Bhattacharya, Hirosane Fujii, Akihiko Fukui, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Rintaro Kirikawa, Iona Kondo, Naoki Koshimoto, Yutaka Matsubara, Sho Matsumoto, Shota Miyazaki, Yasushi Muraki, Arisa Okamura, Greg Olmschenk, Clément Ranc, Nicholas J. Rattenbury, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Taiga Toda, Paul . J. Tristram, Aikaterini Vandorou, Hibiki Yama, (The MOA Collaboration)   +50 more
doaj   +1 more source

Longitudinally Modulated Dynamo Action in Simulated M-dwarf Stars

The Astrophysical Journal, 2022
Abstract M-dwarf stars are well known for the intense magnetic activity that many of them exhibit. In cool stars with near-surface convection zones, this magnetic activity is thought to be driven largely by the interplay of convection and the large-scale differential rotation and circulations it establishes.
Connor P. Bice, Juri Toomre
openaire   +2 more sources

Global trends in winds of M dwarf stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT M dwarf stars are currently the main targets in searches for potentially habitable planets. However, their winds have been suggested to be harmful to planetary atmospheres. Here, in order to better understand the winds of M dwarfs and also infer their physical properties, we perform a one-dimensional magnetohydrodynamic ...
A A Vidotto, A L Mesquita
openaire   +2 more sources

Giant Exoplanets around M-dwarf Stars (GEMS)

, 2023
In this presentation, we describe the new Giant Exoplanets around M dwarf Stars (GEMS) survey initiated to to understand giant planets transiting around M dwarf stars. This survey will try to understand giant planet formation, by shedding light on big planets around small stars.
Kanodia, Shubham, GEMS Team
openaire   +1 more source

No Evidence for More Earth-sized Planets in the Habitable Zone of Kepler's M versus FGK Stars

The Astronomical Journal, 2023
Reliable detections of Earth-sized planets in the habitable zone remain elusive in the Kepler sample, even for M dwarfs. The Kepler sample was once thought to contain a considerable number of M-dwarf stars ( T _eff < 4000 K), which hosted enough Earth ...
Galen J. Bergsten, Ilaria Pascucci, Kevin K. Hardegree-Ullman, Rachel B. Fernandes, Jessie L. Christiansen, Gijs D. Mulders   +5 more
doaj   +1 more source

M-dwarf binaries as tracers of star and brown dwarf formation [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
accepted for publication in MNRAS; 13 pages; 7 figures; 1 table;
Marks, Michael, Janson, Markus, Kroupa, Pavel, Leigh, Nathan, Thies, Ingo   +4 more
openaire   +2 more sources

Detection of Young Massive White Dwarfs in Core-collapsed Globular Cluster NGC 362

The Astrophysical Journal Letters
Core-collapsed globular clusters are ideal targets to explore the presence of stellar collision products. Here, we have studied 17 far-UV bright white dwarf (WD) members in the globular cluster NGC 362 using data obtained from the Ultra Violet Imaging ...
R. K. S. Yadav, Arvind K. Dattatrey, Annapurni Subramaniam, Geeta Rangwal, Ravi S. Singh   +4 more
doaj   +1 more source

THE ULTRAVIOLET RADIATION ENVIRONMENT AROUND M DWARF EXOPLANET HOST STARS [PDF]

The Astrophysical Journal, 2013
The spectral and temporal behavior of exoplanet host stars is a critical input to models of the chemistry and evolution of planetary atmospheres. At present, little observational or theoretical basis exists for understanding the ultraviolet spectra of M dwarfs, despite their critical importance to predicting and interpreting the spectra of potentially ...
France, Kevin, Froning, Cynthia S., Linsky, Jeffrey L., Roberge, Aki, Stocke, John T., Tian, Feng, Bushinsky, Rachel, Désert, Jean-Michel, Mauas, Pablo, Vieytes, Mariela, Walkowicz, Lucianne M.   +10 more
openaire   +4 more sources

Strength through diversity: how cancers thrive when clones cooperate

Molecular Oncology, EarlyView.
Intratumor heterogeneity can offer direct benefits to the tumor through cooperation between different clones. In this review, Kuiken et al. discuss existing evidence for clonal cooperativity to identify overarching principles, and highlight how novel technological developments could address remaining open questions.
Marije C. Kuiken, Maartje Witsen, Emile E. Voest, Krijn K. Dijkstra   +3 more
wiley   +1 more source