Results 11 to 20 of about 11,751 (112)
The chemical abundances in a sample of dwarf irregular galaxies [PDF]
Astronomy and Astrophysics, 2001 Deep groundbased spectra of Hubble V and Hubble X, the two largest and brightest H ii regions in the Local Group dwarf galaxy, NGC 6822, are presented. The extinction, excitation and ionization are studied on scales as small as 4 pc. The chemical composition of some elements within the regions as well as possible small scale variations in the ...
J Masegosa
exaly +2 more sources
THE OUTER DISKS OF DWARF IRREGULAR GALAXIES [PDF]
The Astronomical Journal, 2011 AJ, in ...
Hunter, Deidre A. +7 more
openaire +2 more sources
The Full-fledged Dwarf Irregular Galaxy Leo A [PDF]
The Astrophysical Journal, 2004 9 pages, 3 figures, submitted to ...
Vansevicius, Vladas +10 more
openaire +3 more sources
Commodity risk assessment of Quercus robur plants from the UK
EFSA Journal, Volume 21, Issue 10, October 2023., 2023 Abstract The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as ‘High‐risk plants, plant products and other objects’. This Scientific Opinion covers plant health risks posed by plants of Quercus robur imported from the UK as:
EFSA Panel on Plant Health (PLH) +29 more
wiley +1 more source
A STAR FORMATION LAW FOR DWARF IRREGULAR GALAXIES [PDF]
The Astrophysical Journal, 2015 The radial profiles of gas, stars, and far ultraviolet radiation in 20 dwarf Irregular galaxies are converted to stability parameters and scale heights for a test of the importance of two-dimensional (2D) instabilities in promoting star formation. A detailed model of this instability involving gaseous and stellar fluids with self-consistent thicknesses
Bruce G. Elmegreen, Deidre A. Hunter
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Chemical abundances in the dwarf galaxy NGC 4163 based on the nebular and auroral emission lines
Astronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022 Abstract We constructed an oxygen abundance map and N/O ratio map of the unusually low excitation dwarf irregular galaxy NGC 4163 based on publicly available spectroscopy obtained by the MaNGA survey. We detected auroral emission line [O II]λλ$$ \lambda \lambda $$7320,7330 which allows us to measure chemical abundance by direct Te$$ {\mathrm{T}}_e ...
I. A. Zinchenko, L. S. Pilyugin
wiley +1 more source
The Stellar Content of 10 Dwarf Irregular Galaxies [PDF]
The Astronomical Journal, 1998 We examine the stellar content of 10 dwarf irregular galaxies of which broad-band CCD photometry was published in Hopp & Schulte-Ladbeck (1995). We also present Halpha images for several of these galaxies. The galaxies in the sample are located outside of the Local Group.
Schulte-Ladbeck, Regina E., Hopp, Ulrich
openaire +2 more sources
Journal of Geophysical Research: Biogeosciences, Volume 127, Issue 2, February 2022., 2022 Abstract Observing the environment in the vast regions of Earth through remote sensing platforms provides the tools to measure ecological dynamics. The Arctic tundra biome, one of the largest inaccessible terrestrial biomes on Earth, requires remote sensing across multiple spatial and temporal scales, from towers to satellites, particularly those ...
Peter R. Nelson +19 more
wiley +1 more source
ON THE RADIAL EXTENT OF THE DWARF IRREGULAR GALAXY IC10 [PDF]
The Astrophysical Journal, 2010 7 pages, 4 figures, ApJ Letters ...
Sanna, N. +18 more
openaire +3 more sources
Spectral Feature Extraction Using Partial and General Method
Advances in Astronomy, Volume 2021, Issue 1, 2021., 2021 With the rapid growth in astronomical spectra produced by large sky survey telescopes, traditional manual classification processes can no longer fulfill the requirements of precision and efficiency of spectral classification. There is an urgent need to employ machine learning approaches to conduct automated spectral classification tasks.
Bin Jiang +5 more
wiley +1 more source