Results 41 to 50 of about 52,995 (203)
Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog
Computer Graphics Forum, Volume 44, Issue 3, June 2025.Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi +3 more
wiley +1 more source
Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013 We investigate the spatial distribution of chemical abundances in a sample of low metallicity Wolf‐Rayet (WR) galaxies selected from the SDSS. We used the integral field spectroscopy technique in the optical spectral range (3700 Å–6850 Å) with PMAS attached to the CAHA 3.5 m telescope.
Enrique Pérez-Montero +6 more
wiley +1 more source
ULTRA FAST EVOLUTION OF SAKURAI's OBJECT
Odessa Astronomical Publications, 2017 We model theoretical spectral energy distributions of the "born-again" V4334 Sgr for our grid of hydrogen-deficient model atmospheres with a range of Teff = 4000-5000 K and log g = 1.0 - 0.0.
Ya. Pavlenko
doaj +1 more source
Revisiting Variable Stars Near Globular Clusters South of −29° Declination
Astronomische Nachrichten, Volume 346, Issue 2, February 2025.ABSTRACT We review an often‐cited but seldom‐accessed catalogue by Fourcade and Laborde (1966) of 785 variable stars near 47 southern Galactic globular clusters, and recover the locations of 85 stars that were not incorporated into subsequent variable star catalogues and hence have become “lost” to the literature.
Andrew C. Layden +7 more
wiley +1 more source
AGN Obscuration and the Unified Model
Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012 Unification Models of Active Galactic Nuclei postulate that all the observed differences between type 1 and type 2 objects are due to orientation effects with respect to the line of sight to the observer. The key ingredient of these models is the obscuring medium, historically envisaged as a toroidal structure on a parsec scale.
Stefano Bianchi +3 more
wiley +1 more source
214 -- Using Red Giant Spectroscopy to Compute the Interstellar Reddening of Open Cluster NGC 2194 [PDF]
, 2022 The colossal distances between planet Earth and astronomical objects significantly affects the starlight which our telescopes receive. It is necessary that we first quantify and account for these influences before carrying out scientific research in ...
Ornelas, Daniel
core
Interstellar velocity components towards reddened stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 ABSTRA C T The paper analyses the profiles of interstellar features observed towards heavily reddened stars. All the features show spectacular Doppler-splitting but the radial velocities of the single components as well as the number of such components vary from feature to feature in the same spectrum.
G. A. Galazutdinov +2 more
openaire +1 more source
The deep eclipses of RW Aur revisited by long‐term photometric and spectroscopic monitoring
Astronomische Nachrichten, Volume 345, Issue 4, May 2024.Abstract RW Aurigae is a young stellar system containing a classical T Tauri star as the primary component. It shows deep, irregular dimmings, first detected in 2010. At the University Observatory Jena, we carried out optical follow‐up observations. We performed multiband (BVRI) photometry of the system with the Cassegrain‐Teleskop‐Kamera II and the ...
Oliver Lux +2 more
wiley +1 more source
An Empirical Extinction Curve Revealed by Gaia XP Spectra and LAMOST
The Astrophysical JournalWe present a direct measurement of extinction curves using corrected Gaia XP spectra of the common sources in Gaia DR3 and LAMOST DR7. Our analysis of approximately 370,000 high-quality samples yielded a high-precision average extinction curve for the ...
Ruoyi Zhang +6 more
doaj +1 more source
Interstellar Reddening Towards S188, Hw4 and We1–6 [PDF]
Symposium - International Astronomical Union, 1993 Photoelectric UBV photometry of stars was carried out in the angular vicinity (radius = 15′) of 3 planetary nebulae. An extinction distance relation was constructed for the line of sight towards each planetary nebula. This relation was verified by published data on nearby stars and star clusters. The distances derived are 850 ± 300 pc for PK 128 −04 1 (
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