Results 31 to 40 of about 232,403 (330)

Contributions of structural variations to the asymptotic mixed‐mode coupling Factor in red giant stars

open access: yesAstronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022
Abstract The advent of ultra‐precise photometry space missions enables the possibility of investigating stellar interiors with mixed modes. The structural variations induced by the discontinuity of the chemical composition left behind during the first dredge–up is an important feature in the stellar mid‐layers located between the hydrogen‐burning shell
Chen Jiang
wiley   +1 more source

The colibri telescope array for KBO detection through serendipitous stellar occultations: A technical description

open access: yesFrontiers in Astronomy and Space Sciences, 2022
We present the technical design, construction and testing of the Colibri telescope array at Elginfield Observatory near London, Ontario, Canada. Three 50-cm telescopes are arranged in a triangular array and are separated by 110–160 m.
Michael J. Mazur   +8 more
doaj   +1 more source

Metabolic sensing in AgRP neurons integrates homeostatic state with dopamine signalling in the striatum

open access: yeseLife, 2022
Agouti-related peptide (AgRP) neurons increase motivation for food, however, whether metabolic sensing of homeostatic state in AgRP neurons potentiates motivation by interacting with dopamine reward systems is unexplored. As a model of impaired metabolic-
Alex Reichenbach   +17 more
doaj   +1 more source

The level of photometry is the basic level of the Hungarian galaxy [PDF]

open access: yesمجلة التربية والعلم, 2007
The photometric and fundamental plane for a sample of early type galaxies(elliptical and lenticular galaxies) which belongs to Virgo cluster have been calculated by fitting the Sersic model ( r1/n-model) to the surface brightness profiles along the major
Mohsen Ali, Saad Younis
doaj   +1 more source

Galactic reddening in 3D from stellar photometry – an improved map [PDF]

open access: yes, 2018
We present a new 3D map of interstellar dust reddening, covering three quarters of the sky (declinations of δ ≳ −30°) out to a distance of several kiloparsecs. The map is based on high-quality stellar photometry of 800 million stars from Pan-STARRS 1 and
G. Green   +15 more
semanticscholar   +1 more source

The fourth data release of the Kilo-Degree Survey: ugri imaging and nine-band optical-IR photometry over 1000 square degrees [PDF]

open access: yesAstronomy & Astrophysics, 2019
Context. The Kilo-Degree Survey (KiDS) is an ongoing optical wide-field imaging survey with the OmegaCAM camera at the VLT Survey Telescope, specifically designed for measuring weak gravitational lensing by galaxies and large-scale structure.
K. Kuijken   +47 more
semanticscholar   +1 more source

AN IMPROVED PHOTOCLINOMETRY TECHNIQUE FOR SURFACE RELIEF RETRIEVAL FROM IMAGES: ERROR LEVELS FOR HEIGHT AND SLOPE ESTIMATES [PDF]

open access: yesRadio Physics and Radio Astronomy, 2023
Subject and Purpose. Computer simulation methods are used for investigating the errors that arise in the course of retrieval, by means of an improved photoclinometry technique, of planetary surface reliefs from sets of their photo images.
I. A. Dulova, N. V. Bondarenko
doaj   +1 more source

A design‐oriented approach for managing colored light sources in lighting design software

open access: yesColor Research &Application, Volume 48, Issue 1, Page 32-39, January/February 2023., 2023
Abstract In the last decade, the extensive introduction of LED lighting sources has brought elements of innovation to interior lighting design in terms of color. Besides the new tunable white LED source, lighting is no longer exclusively white; indeed, colored lighting has entered the design practice thanks to the positive effects on people's health ...
Maurizio Rossi
wiley   +1 more source

Fixing the U-band photometry of Type Ia supernovae [PDF]

open access: yes, 2012
We present previously unpublished photometry of supernovae 2003gs and 2003hv. Using spectroscopically-derived corrections to the U-band photometry, we reconcile U-band light curves made from imagery with the Cerro Tololo 0.9-m, 1.3-m and Las Campanas 1-m
Bastola, Deepak   +10 more
core   +8 more sources

Home - About - Disclaimer - Privacy