Results 71 to 80 of about 154,367 (172)
Journal of Geophysical Research: Planets, Volume 130, Issue 3, March 2025.Abstract As part of the Apollo Next‐Generation Sample Analysis (ANGSA) program, we provide bulk composition, mineralogy, petrology, and noble gas assays of lunar particles and soils from the top half of the 73001/2 double‐drive tube (i.e., 73002) studied by the ANGSA consortium.
Barbara A. Cohen +7 more
wiley +1 more source
What determines the sizes of bars in spiral galaxies? [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 ABSTRACT I use volume- and mass-limited subsamples and recently published data from the Spitzer Survey of Stellar Structure in Galaxies (S4G) to investigate how the size of bars depends on galaxy properties. The known correlation between bar semimajor axis a and galaxy stellar mass (or luminosity) is actually bimodal: for $\log \, (M_ ...
openaire +2 more sources
Rings and spirals in barred galaxies â II. Ring and spiral morphology [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 15 pages, 11 figures, accepted for publication in ...
E. Athanassoula +4 more
openaire +3 more sources
Mapping the Active Galactic Nucleus Effects on the Stellar and Gas Properties of NGC 5806
The Astrophysical JournalIt is commonly accepted that active galactic nuclei (AGNs) have a strong impact upon the evolution of their host galaxies, but the processes by which they do so are not fully understood.
Sophie L. Robbins +2 more
doaj +1 more source
Bar Fraction in Early- and Late-type Spirals [PDF]
, 2019 Bar fractions depend on the properties of the host galaxies, which are closely related to the formation and evolution of bars. However, observational studies do not provide consistent results. We investigate the bar fraction and its dependence on the properties of the host galaxies by using three bar classification methods: visual inspection, ellipse ...
arxiv +1 more source
Bar rejuvenation in S0 galaxies? [PDF]
, 2020 Based on the colour measurements from a multi-band, multi-component 2D decomposition's of S0 and spiral galaxies using SDSS images, we found that bars are bluer in S0 galaxies compared to the spiral galaxies. Most of the S0s in our sample have stellar masses $\sim L_{*}$ galaxies.
arxiv +1 more source
Enhancing Color Gamut with Wavelength‐Selective Polarization Modulation in Chiral Liquid Crystals
Advanced Optical Materials, Volume 13, Issue 4, February 3, 2025.This study presents a method to broaden the color range of dichroic dye‐doped liquid crystal films by integrating cholesteric liquid crystals as polarization modulators. The approach enables precise control over transmission colors through wavelength‐ and polarization‐selective absorption, achieving new color variations, including green, and offering ...
Hyewon Park +3 more
wiley +1 more source
Multicolor Photometry of Barred Spiral Galaxies [PDF]
International Astronomical Union Colloquium, 1996 B – V and R – I color maps (from CCD imagery obtained at Cerro Tololo Inter-American Observatory) of six barred spiral galaxies have been used (Horst 1992) to investigate stellar populations within the bars and nuclei. Two-color diagrams show that the distribution of pixel colors largely parallels the expected locus for normal unreddened stars. If the “
William D. Horst, Charles J. Peterson
openaire +2 more sources
Early-growing Supermassive Black Holes Strengthen Bars and Boxy/Peanut Bulges
The Astrophysical Journal, 2023 Using N -body simulations, we explore the effects of growing a supermassive black hole (SMBH) prior to or during the formation of a stellar bar. Keeping the final mass and growth rate of the SMBH fixed, we show that if it is introduced before or while ...
Vance Wheeler +4 more
doaj +1 more source
Effect of bars on the galaxy properties [PDF]
A&A 595, A63 (2016), 2016 Aims: With the aim of assessing the effects of bars on disc galaxy properties, we present an analysis of different characteristics of spiral galaxies with strong, weak and without bars. Method: We identified barred galaxies from the Sloan Digital Sky Survey.
arxiv +1 more source