Results 21 to 30 of about 962,797 (273)

Hypercat : A Database for extragalactic astronomy

open access: yes, 1999
The Hypercat Database is developed at Observatoire de Lyon and is distributed on the WEB through different mirrors in Europe. The goal of Hypercat is to gather data necessary for studying the evolution of galaxies (dynamics and stellar contains) and particularly for providing a z=0 reference for these studies.
Prugniel, Ph., Maubon, G.
openaire   +2 more sources

TESS–Gaia Light Curve: A PSF-based TESS FFI Light-curve Product

open access: yesThe Astronomical Journal, 2023
The Transiting Exoplanet Survey Satellite (TESS) is continuing its second extended mission after 55 sectors of observations. TESS publishes full-frame images (FFIs) at a cadence of 1800, 600, or 200 s, allowing light curves to be extracted for stars ...
Te Han, Timothy D. Brandt
doaj   +1 more source

The Eclipsing Binaries from the LAMOST Medium-resolution Survey. III. A High-precision Empirical Stellar Mass Library

open access: yesThe Astronomical Journal, 2023
High-precision stellar masses and radii measured directly from binaries can effectively calibrate stellar models. However, such a database containing full spectral types and a large range of metallicity is still not fully established. A continuous effort
Jianping Xiong   +8 more
doaj   +1 more source

Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement

open access: yesGeophysical Monograph Series, Page 27-82., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm   +2 more
wiley  

+1 more source

Astronomy & Astrophysics (CAUCASUS)-VOLUME 2

open access: yes, 2020
The second volume of the international scientific journal Astronomy & Astrophysics (Caucasus) contains the scientific works delivered as scientific reports by their authors at International Scientific Conference Modern Problems of Astrophysics – II ...
(CAUCASUS), Astronomy & Astrophysics
core   +1 more source

Frequency-dependent time-delays for strong outbursts in selected blazars from the Metsähovi and the University of Michigan Radio Astronomy Observatory monitoring databases – I. [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2006
The combined data of the University of Michigan Radio Astronomy Observatory and Metsahovi Radio Observatory provide us with radio light curves for active galactic nuclei monitored by both observatories from 4.8 to 37 GHz covering time-intervals up to ∼25 yr.
Pyatunina, T. B.   +6 more
openaire   +2 more sources

Information handling in astronomy : beyond technologies and methodologies [PDF]

open access: yes, 2001
A few comments are offered in the light of about thirty years of activities linked to the information flow in astronomy and of about two decades of blossoming of electronic networks and tools including the World-Wide Web. Some points are emphasized (such
Heck, André
core   +1 more source

Astronomy & Astrophysics (CAUCASUS)-VOLUME 3

open access: yes, 2020
The III volume of Journal “Astronomy & Astrophysics (Caucasus)” was dedicated to the 110th Anniversary of Academician Eugene Kharadze. Academician Evgene Kharadze Vice - President of International Union of Astronomy (1976-82) I would like to give you
(Caucasus)”, Astronomy & Astrophysics
core   +1 more source

Big Data in Astronomy: Surveys, Catalogs, Databases and Archives

open access: yesCommunications of the Byurakan Astrophysical Observatory, 2020
We present the modern situation in astronomy, where Big Data coming from the Universe put new tasks for catalogizing, storage, archiving, analysis and usage of the scientific information. The two major characteristics of modern astronomy are multiwavelength (MW) studies (from γ-ray to radio, as well as multi-messenger studies, using also neutrinos ...
openaire   +1 more source

SpecTE: Parameter Estimation for LAMOST Low-resolution Stellar Spectra Based on Denoising Pretraining

open access: yesThe Astrophysical Journal Supplement Series
This paper proposes a spectral transformer encoder (SpecTE) model based on a denoising pretraining technique, and applies it to estimating radial velocity (RV) and three stellar atmospheric physical parameters together with 15 chemical element abundances
Xirong Zhao   +3 more
doaj   +1 more source

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