Results 31 to 40 of about 47,444 (303)
Spectro-Thermometry of M dwarfs and their candidate planets: too hot, too cool, or just right? [PDF]
, 2013 We use moderate-resolution spectra of nearby late K and M dwarf stars with parallaxes and interferometrically determined radii to refine their effective temperatures, luminosities, and metallicities. We use these revised values to calibrate spectroscopic
Ansdell, Megan +2 more
core +3 more sources
Mapping the Skies of Ultracool Worlds: Detecting Storms and Spots with Extremely Large Telescopes
The Astrophysical Journal, 2023 Extremely large telescopes (ELTs) present an unparalleled opportunity to study the magnetism, atmospheric dynamics, and chemistry of very-low-mass (VLM) stars, brown dwarfs, and exoplanets.
Michael K. Plummer, Ji Wang
doaj +1 more source
, 2011 [abridged] The galactic field's late-type stellar single and binary population is calculated on the supposition that all stars form as binaries in embedded star clusters.
Bate +74 more
core +1 more source
Search for radial velocity variations in eight M-dwarfs with NIRSPEC/Keck II [PDF]
, 2011 Context. Radial velocity (RV) measurements from near-infrared spectra have become a potentially powerful tool to search for planets around cool stars and sub-stellar objects. As part of a large survey to characterize M-dwarfs using NIRSPEC at Keck II, we
Anglada-Escudé +36 more
core +3 more sources
TheEUVEOptical Identification Campaign II: Late-Type and White Dwarf Stars [PDF]
International Astronomical Union Colloquium, 1996 We present optical identifications of nine previously unidentified extreme ultraviolet (EUV) sources discovered during theExtreme Ultraviolet Explorer(EUVE) satellite surveys. The all-sky survey detected four of the sources and the more sensitive deep survey detected the other five sources.
N. Craig +9 more
openaire +1 more source
Resolved Spectroscopy of M Dwarf/L Dwarf Binaries. II. 2MASS J 17072343-0558249AB [PDF]
, 2006 We present IRTF SpeX observations of the M/L binary system 2MASS J17072343-0558249. SpeX imaging resolves the system into a 1"01+/-0.17 visual binary in which both components have red near infrared colors.
Adam J. Burgasser +7 more
core +2 more sources
Stellar Atmospheric Parameters for Cool Dwarfs in Gaia Data Release 3
The Astrophysical Journal Supplement SeriesWe provide a catalog of atmospheric parameters for 1,806,921 cool dwarfs from Gaia Data Release 3 (DR3) that lie within the range covered by LAMOST cool dwarf spectroscopic parameters: 3200 K < T _eff < 4300 K, −0.8 < [M/H] < 0.2 dex, and 4.5 < log g < 5.
Cai-Xia Qu +6 more
doaj +1 more source
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 ...
Alonso, E. Diez +11 more
openaire +3 more sources
Characterizing the Cool KOIs. VI. H- and K-band Spectra of Kepler M Dwarf Planet-Candidate Hosts [PDF]
, 2014 We present H- and K-band spectra for late-type Kepler Objects of Interest (the "Cool KOIs"): low-mass stars with transiting-planet candidates discovered by NASA's Kepler Mission that are listed on the NASA Exoplanet Archive.
Baranec, Christoph +14 more
core +3 more sources
Generative Models for Crystalline Materials
Advanced Materials, EarlyView.Generative machine learning models are increasingly used in crystalline materials design. This review outlines major generative approaches and assesses their strengths and limitations. It also examines how generative models can be adapted to practical applications, discusses key experimental considerations for evaluating generated structures, and ...
Houssam Metni +15 more
wiley +1 more source