Results 231 to 240 of about 431,245 (326)

Semantic primitives and compositionality: An Annual Review of Information Science and Technology (ARIST) paper

Journal of the Association for Information Science and Technology, EarlyView.
Abstract The term semantic primitives refers to a set of basic, atomic concepts from which all other (compound) concepts are constructed. It presupposes the principle of compositionality—the idea that complex items or expressions can be formed by combining simpler constituents.
Birger Hjørland
wiley   +1 more source

Tidal tail identification and detailed analysis of the open star cluster King 13 using Gaia DR3 and 2MASS. [PDF]

Sci Rep
Ahmed NM, Darwish MS.
europepmc   +1 more source

Uncertainties in Historic Visual Double Star Measures—III Accurate Calibration Pairs

Astronomische Nachrichten, EarlyView.
ABSTRACT Based on space‐based positions and proper motions, we present accurate rectilinear elements for 857 double star pairs over the celestial sphere. These elements allow for the computation of precision ephemeris Position Angles and Separations of these pairs.
Roderick R. Letchford, Graeme L. White
wiley   +1 more source

Strong gravitational lenses from the Vera C. Rubin Observatory. [PDF]

Philos Trans A Math Phys Eng Sci
Shajib AJ, Smith GP, Birrer S, Verma A, Arendse N, Collett T, Daylan T, Serjeant S, LSST Strong Lensing Science Collaboration.   +8 more
europepmc   +1 more source

Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status

Astronomische Nachrichten, EarlyView.
ABSTRACT We present new radial velocity measurements of 13 selected intermediate mass stars (2–6 M⊙). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the échelle spectrograph FLECHAS. The radial velocity of eight stars was found to be constant during our spectroscopic monitoring, namely: 17
J. Bätz, M. Mugrauer, K.‐U. Michel, J. Reichert, A. Tschirschky, L. Pietsch, F. Edelmann, R. Neuhäuser   +7 more
wiley   +1 more source

Precision analysis of NGC 2158 with Gaia DR3. [PDF]

Sci Rep
Ahmed NM, Tadross AL.
europepmc   +1 more source

Data for the paper "Uncovering the birth of the Milky Way through accurate stellar ages with Gaia", accepted in Nature Astronomy

, 2019
Carme Gallart, Edouard J. Bernard, Chris B. Brook, T. Ruiz-Lara, S. Cassisi, V. Hill, M. Monelli   +6 more
openalex   +1 more source

PERICLES: A Set of Empirical Rotational Isochrones Modeled on Cool Dwarfs in Open Clusters and Wide Binaries

Astronomische Nachrichten, EarlyView.
ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley   +1 more source

A transiting giant planet in orbit around a 0.2-solar-mass host star. [PDF]

Nat Astron
Bryant EM, Jordán A, Hartman JD, Bayliss D, Sedaghati E, Barkaoui K, Chouqar J, Pozuelos FJ, Thorngren DP, Timmermans M, Almenara JM, Chilingarian IV, Collins KA, Gan T, Howell SB, Narita N, Palle E, Rackham BV, Triaud AHMJ, Bakos GÁ, Brahm R, Hobson MJ, Van Eylen V, Amado PJ, Arnold L, Bonfils X, Burdanov A, Cadieux C, Caldwell DA, Casanova V, Charbonneau D, Clark CA, Collins KI, Daylan T, Dransfield G, Demory BO, Ducrot E, Fernández-Rodríguez G, Fukuda I, Fukui A, Gillon M, Gore R, Hooton MJ, Ikuta K, Jehin E, Jenkins JM, Levine AM, Littlefield C, Murgas F, Nguyen K, Parviainen H, Queloz D, Seager S, Sebastian D, Srdoc G, Vanderspek R, Winn JN, de Wit J, Zúñiga-Fernández S.   +58 more
europepmc   +1 more source

Confirmation of a Non‐Transiting Planet in the Habitable Zone of the Nearby M Dwarf L 98‐59

Astronomische Nachrichten, EarlyView.
ABSTRACT Only 40 exoplanetary systems with five or more planets are currently known. These systems are crucial for our understanding of planet formation and planet‐planet interaction. The M dwarf L 98‐59 has previously been found to show evidence of five planets, three of which are transiting.
Paul I. Schwarz, Stefan Dreizler, René Heller   +2 more
wiley   +1 more source