Results 71 to 80 of about 53,883 (266)

Uv Fluxes In Elliptical Galaxies [PDF]

Symposium - International Astronomical Union, 1997
The key properties of elliptical galaxies are compared to present-day models calling attention on several points of contradiction. The nature of the UV fluxes and their usefulness to cast light on the age-metallicity dilemma are discussed. Finally, preliminary results of an attempt aimed at reconciling theory with observations by means of an new IMF ...
openaire   +1 more source

Improved taxonomic and gene sampling advance the knowledge of deep relationships within Macrodasyida (Gastrotricha)

Cladistics, Volume 42, Issue 1, Page 25-45, February 2026.
Abstract Advances in Macrodasyida (Gastrotricha) phylogenetics, fuelled by new species discoveries and molecular data, are reshaping taxonomic classifications. Molecular analyses suggest polyphyly in Cephalodasyidae and Macrodasyidae, yet insufficient sampling continues to obscure precise relationships.
Agata Cesaretti, Anush Kosakyan, Francesco Saponi, M. Antonio Todaro   +3 more
wiley   +1 more source

A Catalog of Photometric Redshift and the Distribution of Broad Galaxy Morphologies

Galaxies, 2018
We created a catalog of photometric redshift of ∼3,000,000 SDSS galaxies annotated by their broad morphology. The photometric redshift was optimized by testing and comparing several pattern recognition algorithms and variable selection strategies, and ...
Nicholas Paul, Nicholas Virag, Lior Shamir   +2 more
doaj   +1 more source

Hubble Space Telescope Imaging of the CFRS and LDSS Redshift Surveys---III. Field elliptical galaxies at 0.2 < z < 1.0

, 1999
Surface photometry has been performed on a sample of 46 field elliptical galaxies. These galaxies are described well by a deVaucouleurs R^{1/4} profile. The sample was selected from the combined Canada-France and LDSS redshift surveys and spans the range
Aragon-Salamanca, Barger, Barnes, Barrientos, Baugh, Bender, Bender, Bower, Brinchmann, Courteau, D. Crampton, David Schade, de Vaucouleurs, Dressler, Driver, Ellis, Ellis, Forbes, Franceschini, François Hammer, Guzman, Hammer, Hau, Im, Jarle Brinchmann, Jorgensen, K. Glazebrook, Kauffman, Kauffmann, Kauffmann, Kelson, L. Tresse, Larson, Le Fèvre, Lilly, Marzke, Matthew Colless, Menanteau, Mobasher, Negroponte, O. Le Fèvre, Pahre, Pahre, Patton, Press, R. Abraham, R. S. Ellis, S. J. Lilly, Scalo, Schade, Schade, Schade, Silva, Silva, Stanford, Tom Broadhurst, Totani, van der Kruit, van Dokkum, van Dokkum, White   +60 more
core   +2 more sources

Dynamical Models of Elliptical Galaxies [PDF]

Symposium - International Astronomical Union, 1975
Self-consistent dynamical models of elliptical galaxies have been constructed using a modification of the Prendergast-Tomer algorithm. They reproduce many of the observed properties of elliptical galaxies.
openaire   +1 more source

Bulbil formation in stress: Crucial role of triploid fitness in mixed ploidy dynamics in Costus speciosus

Plant Species Biology, Volume 41, Issue 1, January 2026.
Upon prolonged waterlogging, a Costus speciosus plant developed bulbils at stem node. Karyotype analysis, nucleolar staining, and anatomical study revealed its triploid status and developmental aspects. Prevalence of tetraploid, abundance, and unique reproductive fecundity of the triploid, indicates its determinant role in coexistence of the multiple ...
Surochita Basu, Uttam Deb, Reecha Das, Supriya Adhikari   +3 more
wiley   +1 more source

The Hierarchical Origins of Observed Galaxy Morphology [PDF]

, 2013
Galaxies grow primarily via accretion-driven star formation in discs and merger-driven growth of bulges. These processes are implicit in semi-analytical models of galaxy formation, with bulge growth in particular relating directly to the hierarchical ...
De Lucia, Gabriella, Erwin, Peter, Fontanot, Fabio, Monaco, Pierluigi, Wilman, David J.   +4 more
core   +1 more source

Clinically Inspired Multimodal Treatment Using Induced Neural Stem Cells‐Derived Exosomes Promotes Recovery of Traumatic Brain Injury through Microglial Modulation

Advanced Science, Volume 12, Issue 46, December 11, 2025.
This study explores the therapeutic potential of iNSC‐Exo via local and systemic delivery in TBI mice. It is found that iNSC‐Exo enhances NRXN signaling through Microglia_Nrg3 and Microglia_Rarb, effectively promoting functional and neurological recovery, suggesting a new therapeutic strategy for TBI. Abstract Traumatic brain injury (TBI) poses serious
Jiaojiao Li, Maoxiang Xu, Boyu Cai, Xiangyu Li, Zhanping Liang, Xiaohuan Xia, Haitao Zhang, Zhiwen Zhang, Fei Tan, Jialin Charlie Zheng   +9 more
wiley   +1 more source

X-ray Emission from the Interstellar and Circumgalactic Medium of Elliptical Galaxies based on MACER simulations [PDF]

, 2022
Aditi Vijayan, Bocheng Zhu, Miao Li, Feng Yuan, Luis C. Ho   +4 more
openalex   +1 more source

The Complete Chloroplast Genome and Morphological Data Support Reinstatement of Sedum jinianum (Crassulaceae) as an Independent Species

Ecology and Evolution, Volume 15, Issue 12, December 2025.
Phylogenetic analysis based on complete plastome data indicates that S. jinianum forms a monophyletic clade, sister to a well‐supported clade comprising four S. bulbiferum samples, supporting the reinstatement of S. jinianum as an independent species. ABSTRACT Sedum jinianum (Crassulaceae) has been treated as a synonym of S.
Lang Shen, Hai‐Jun Ma, Lu‐Jing Wang, Wan‐Zeng Wang, Xiang Wang, Xiang‐Yang Sun, Hao‐Nan Zhang, Wei‐Qi Meng, Kun Liu   +8 more
wiley   +1 more source