Results 1 to 10 of about 657 (262)
Linking chromospheric activity and magnetic field properties for late-type dwarf stars
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT Spectropolarimetric data allow for simultaneous monitoring of stellar chromospheric $\log {R^{\prime }_{\rm {HK}}}$ activity and the surface-averaged longitudinal magnetic field, Bl, giving the opportunity to probe the relationship between large-scale stellar magnetic fields and chromospheric manifestations of magnetism.
E L Brown, S C Marsden, J Morin
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Absolute magnitudes for late-type dwarf stars for Sloan photometry
Astronomische Nachrichten, 2005 We present a new formula for absolute magnitude determination for late-type dwarf stars as a function of (g-r) and (r-i) for Sloan photometry. The absolute magnitudes estimated by this approach are brighter than those estimated by colour-magnitude diagrams, and they reduce the luminosity function rather close to the luminosity function of Hipparcos.
S Bilir, S Karaali
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Searching for Radio Late-type Dwarf Stars in the GLEAM-X DR1 Catalog
The Astrophysical JournalWe have developed a new method of multiwavelength data combination for the search of late-type radio dwarfs, and have put it into practice using GLEAM-X DR1 data.
Qichen Huang +3 more
doaj +4 more sources
Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 13 pages, 13 figures, 5 ...
A Suarez Mascareno +2 more
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Two planetary systems with transiting Earth-sized and super-Earth planets orbiting late-type dwarf stars [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2018 ABSTRACTWe present two new planetary systems found around cool dwarf stars with data from the K2 mission. The first system was found in K2-239 (EPIC 248545986), characterized in this work as M3.0V and observed in the 14th campaign of K2. It consists of three Earth-sized transiting planets with radii of 1.1, 1.0, and 1.1 R⊕, showing a compact ...
E Diez Alonso +2 more
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Spots and Flares in Hot Main Sequence Stars Observed by Kepler, K2, and TESS
Frontiers in Astronomy and Space Sciences, 2021 About 22,000 Kepler stars, 7,000 K2 stars, and nearly 60,000 TESS stars from sectors 1–24 have been classified according to variability type. A large proportion of stars of all spectral types appear to have periods in their light curves consistent with ...
Luis A. Balona
doaj +1 more source
A Mini Atlas of H-Band Spectra of Southern Symbiotic Stars
Galaxies, 2023 Symbiotic stars are interacting binary systems composed of an evolved star (generally a late-type red giant) and a degenerate or dwarf companion in orbit close enough for mass transfer to occur. Understanding the status of the late-type star is important
Paula Esther Marchiano +6 more
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First Byurakan Spectral Survey. Late-Type Stars. Dwarfs
Communications of the Byurakan Astrophysical Observatory, 2022 A total of 18 lists of the First Byurakan Survey of Late-Type Stars (FBSLTS) were published between 1990 and 2016. The stars were found on FBS low-dispersion spectral plates. A systematic search and selection were carried out on a surface of ∼16 000deg2 on almost the whole area of the FBS.
Gigoyan, K. S. +7 more
openaire +2 more sources
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 +3 more
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Living with a Red Dwarf: The Rotation–Age Relationships of M Dwarfs
The Astrophysical Journal Letters, 2023 Age is a fundamental stellar property, yet for many stars, it is difficult to reliably determine. For M dwarfs, it has been notoriously so. Due to their lower masses, core hydrogen fusion proceeds at a much slower rate in M dwarfs than it does in more ...
Scott G. Engle, Edward F. Guinan
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