Results 21 to 30 of about 12,211 (252)
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
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
The extended structure of the dwarf irregular galaxy Sagittarius [PDF]
Astronomy & Astrophysics, 2014 We present a detailed study of the stellar and HI structure of the dwarf irregular galaxy Sagittarius. We use new deep and wide field photometry to trace the surface brightness profile of the galaxy out to ~5.0' (corresponding to ~1600 pc) and down to $ _V\simeq 30.0$ mag/arcsec$^2$, thus showing that the stellar body of the galaxy is much more ...
Vincenzo Testa +9 more
openaire +10 more sources
The Full-fledged Dwarf Irregular Galaxy Leo A [PDF]
The Astrophysical Journal, 2004 9 pages, 3 figures, submitted to ...
Chisato Ikuta +10 more
openaire +3 more sources
The inclination of the dwarf irregular galaxy Holmberg II
, 2014 We provide constraints on the inclination angle of the H\,{\sc i} disk of the dwarf irregular galaxy Holmberg II (Ho II) from stability analysis of the outer gaseous disk. We point out that a mean inclination angle of 27 degrees and thus a flat circular velocity of ~60 km/s, is required to have a level of gravitational stability similar to that found ...
F. J. Sánchez-Salcedo +2 more
openalex +5 more sources
ON THE RADIAL EXTENT OF THE DWARF IRREGULAR GALAXY IC10 [PDF]
The Astrophysical Journal, 2010 7 pages, 4 figures, ApJ Letters ...
Michele Cignoni +18 more
openaire +4 more sources
Stellar Populations of Dwarf Irregular Galaxies [PDF]
Symposium - International Astronomical Union, 1996 We recently completed two-color CCD photometry of resolved stars in 11 dwarf irregular galaxies (Hopp & Schulte-Ladbeck, 1995, A&AS 111, 527), selected because of their relative isolation from massive galaxies in the Kran-Korteweg – Tammann sample (1979, AN 300, 181).
Ulrich Hopp, Regina E. Schulte-Ladbeck
openaire +2 more sources
Massive stars in the Sagittarius Dwarf Irregular Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2017 Abstract Low metallicity massive stars hold the key to interpret numerous processes in the past Universe including re–ionization, starburst galaxies, high-redshift supernovae, and γ-ray bursts. The Sagittarius Dwarf Irregular Galaxy [SagDIG, 12+log(O/H) = 7.37] represents an important landmark in the quest for analogues accessible with ...
Sang Chul Kim, Myung Gyoon Lee
openaire +8 more sources
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.
Ulrich Hopp, Regina E. Schulte-Ladbeck
openaire +3 more sources
The Interstellar Medium of Dwarf Galaxies
Galaxies, 2022 Dwarf galaxies are by far the most numerous galaxies in the Universe, showing properties that are quite different from those of their larger and more luminous cousins. This review focuses on the physical and chemical properties of the interstellar medium
Christian Henkel +2 more
doaj +1 more source