Results 41 to 50 of about 121 (116)

The effects of Boxy/Peanut bulges on galaxy models [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
Accepted for publication in ...
Fragkoudi, F., Athanassoula, E., Bosma, A., Iannuzzi, F.   +3 more
openaire   +3 more sources

KNaCaSi4O10 Obtained From Crystallization Experiments in the Quaternary System K2O–Na2O–CaO–SiO2

Journal of the American Ceramic Society, Volume 109, Issue 3, March 2026.
The compound KNaCaSi4O10 has been identified in crystallization experiments of glasses in the quaternary system K2O–Na2O–CaO–SiO2 and has undergone structural characterization. Vibrational spectroscopic data have been acquired and interpreted using density functional theory (DFT) calculations.
Volker Kahlenberg, Eugen Libowitzky, Thomas S. Hofer   +2 more
wiley   +1 more source

To multicellularity and back again: Description of two new coccoid genera (Portococcus gen. nov. and Pseudanabaenococcus gen. nov.) in the basal “filamentous” order Pseudanabaenales, Cyanobacteria

Journal of Phycology, Volume 62, Issue 1, Page 234-255, February 2026.
Abstract Despite recent efforts in taxonomic revision of phylogenetically basal photosynthetic cyanobacteria, cryptic diversity and recurrence of simple plesiomorphic morphotypes has continued to appear in phylogenies with poorly characterized “Synechococcus” and “Pseudanabaena” strains.
Otakar Strunecký, Eliška Kozlíková‐Zapomělová, Jitka Jezberová, João Morais, María Alicia Toledo Lemus, Lenka Štenclová, Jeffrey R. Johansen, Kateřina Čapková, Vitor M. O. Vasconcelos, Jan Mareš   +9 more
wiley   +1 more source

Rotation Curves of Galaxies: A New Theoretical Approach and Comparison With Observations

Advances in Astronomy, Volume 2026, Issue 1, 2026.
Observational results on the rotation curve of a rotating galaxy are used in thought experiments. A binary system is inserted in the galaxy, and equations for radial accelerations of the two bodies are found. Similarly, a single body is inserted in a multicomponent galaxy, and an equation for radial acceleration of the body is discussed.
J. Klačka, Sándor Frey
wiley   +1 more source

Astragalus zhobensis, a new species of section Caprini (Fabaceae) from Zhob, northern Balochistan, Pakistan

Nordic Journal of Botany, Volume 2025, Issue 12, December 2025.
A new species Astragalus zhobensis, from Qamardin Karez, Zhob district, northern Balochistan, Pakistan is described and illustrated. The new species is morphologically similar to A. cartilagineus, but can be distinguished by strigose hairs 3–5 mm long, (not stiff 1.5−4.0 mm long hairs); stipules 5–15 mm (not 8−12 mm) long; leaflets in 4–6 pairs, (not 3–
Tahir Khan, Nazar Khan, Amjad Khan, Amir Sultan, Kamran Ishaq   +4 more
wiley   +1 more source

Landslide preparation by forestry activity in a region of high erosion rates: Waingake Landslide, northeast New Zealand

New Zealand Journal of Geology and Geophysics, Volume 68, Issue 5, Page 1015-1030, December 2025.
ABSTRACT Northeastern New Zealand’s sedimentary rocks and soils are particularly vulnerable to landsliding, with some of the highest specific sediment yields, globally. In addition to earthquakes, rainfall is considered an important landslide triggering process.
Jivyde Despojo, Martin S. Brook, David Alama, Matthew E. Cook, Murry Cave   +4 more
wiley   +1 more source

Bayesian bulge–disc decomposition of galaxy images [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
We introduce PHI, a fully Bayesian Markov-chain Monte Carlo algorithm designed for the structural decomposition of galaxy images. PHI uses a triple layer approach to effectively and efficiently explore the complex parameter space. Combining this with the use of priors to prevent nonphysical models, PHI offers a number of significant advantages for ...
Argyle, JJ, Mendez-Abreu, J, Wild, V, Mortlock, DJ   +3 more
openaire   +4 more sources

A new genus of jumping spiders (Araneae: Salticidae) inhabiting the South Island New Zealand rocky alpine zone

New Zealand Journal of Zoology, Volume 52, Issue 5, Page 716-795, December 2025.
ABSTRACT The spider family Salticidae (jumping spiders) is among the most heavily researched groups of invertebrates globally. Nevertheless, in Aotearoa New Zealand most species have never been studied. While it is estimated that approximately 200 endemic salticid species are found across the country, only around 50 have been described and fewer than ...
Robin G. Long, Cor J. Vink, Adrian M. Paterson   +2 more
wiley   +1 more source

Disk‐Bulge‐Halo Models for the Andromeda Galaxy [PDF]

The Astrophysical Journal, 2003
We present a suite of semi-analytic disk-bulge-halo models for the Andromeda galaxy (M31) which satisfy three fundamental conditions: (1) internal self-consistency; (2) consistency with observational data; and (3) stability of the disk against the formation of a central bar. The models are chosen from a set first constructed by Kuijken and Dubinski. We
Widrow, Lawrence M., Perrett, Kathryn M., Suyu, Sherry H.   +2 more
openaire   +2 more sources

JWST Imaging of the Closest Globular Clusters—VI. The Lowest‐Mass Objects in M 4 and the Galactic Bulge

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin, R. Gerasimov, A. Calamida, M. Libralato, M. Scalco, D. Nardiello, M. Griggio, D. Apai, J. Anderson, A. Bellini, A. Burgasser   +10 more
wiley   +1 more source