Results 51 to 60 of about 560 (161)
The Astrophysical Journal Supplement SeriesNear-ultraviolet (NUV) radiation from dwarf stars plays a critical role in shaping the habitability of planetary systems, yet its long-term evolution across different spectral types remains poorly investigated.
Xue Li +5 more
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First detection of nonflare microwave emissions from the coronae of single late-type dwarf stars
The Astrophysical Journal, 1981 Results are presented of a search for nonflare microwave radiation from the coronae of nearby late-type dwarf stars comparable to the sun: single stars without evidence for either a large wind or circumstellar envelope. The observing program consisted of flux measurements of six stars over a 24-h period with the VLA in the C configuration at a ...
D. E. Gary, J. L. Linsky
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Searching for GEMS: The Occurrence of Giant Planets Orbiting M Dwarfs within 100 pc
The Astronomical JournalWe present results from a systematic search for transiting short-period giant exoplanets around M dwarf stars (GEMS; P
Rowen I. Glusman +32 more
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The Astrophysical JournalThe Near-Infrared Spectrometer and Photometer on board the Euclid space mission has obtained near-infrared (NIR) slitless spectra of millions of objects, including hundreds of ultracool dwarfs (UCDs).
C. Dominguez-Tagle +16 more
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The Astrophysical JournalWe investigate the presence of high-ionization fine-structure emission lines across a range of 22 OB-type stars observed with JWST-MIRI as part of calibration programs and the Webb Investigation of Silicates, Carbons, and Ices and the Measuring ...
Calum Hawcroft +10 more
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Tidally Delayed Spin-Down of Very Low Mass Stars
The Open Journal of AstrophysicsVery low-mass main-sequence stars reveal some curious trends in observed rotation period distributions that require abating the spin-down that standard rotational evolution models would otherwise imply.
Ketevan Kotorashvili, Eric G. Blackman
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, 2004 Recent discoveries from red optical proper motion and wide-field near-infrared surveys have uncovered a new population of ultracool subdwarfs -- metal-poor stars and brown dwarfs extending into the late-type M, L and possibly T spectral classes. These objects are among the first low-mass stars and brown dwarfs formed in the Galaxy, and are valuable ...
Burgasser, Adam J. +2 more
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The Astronomical JournalWe measured lithium (Li) abundance and instantaneous chromospheric Ca ii HK activity in Hamilton Echelle Spectrograph observations of 211 solar analog field stars, with one objective being potential identification of grand minimum candidates for ongoing ...
Dan Lubin +4 more
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A magnetic study of spotted UV Ceti flare stars and related late-type dwarfs
The Astrophysical Journal, 1980 A multichannel photoelectric Zeeman analyzer has been used to investigate the magnetic nature of the spotted UV Ceti flare stars. Magnetic observations were obtained on a sample of 19 program objects, of which 5 were currently spotted dKe-dMe stars, 7 were normal dK-dM stars, 7 were UV Ceti flare stars, and 1 was a possible post-T Tauri star.
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A Possible Correlation between Metallicity and Near-IR Color for Late-M and L Dwarfs
The Astrophysical JournalWe examine the relationship between metallicity and J − K color for 64 benchmark late-M and L dwarfs, all of which are wide companions to higher-mass stars, and six of which are new discoveries.
Ruihan Zhang +2 more
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