Results 81 to 90 of about 119,777 (310)
A Planetary Mass and Stellar Radius Relationship for Exoplanets Orbiting Red Giants [PDF]
, 2018 A scatter plot of exoplanet mass against red giant host star radius demonstrates an interesting positive trend: larger stars have more massive planets. This implies that the evolution of a star towards a red giant affects the masses of planets in the system.
arxiv +1 more source
Nucleosynthesis in Red Giant Stars [PDF]
Symposium - International Astronomical Union, 2002 The production of elements from helium-3 to fluorine in low- and intermediate-mass stars is reviewed and compared to chemical abundances observed at the surface of both red giant branch and asymptotic giant branch stars. It is highlighted that, while the trends predicted by standard models are generally well confirmed, many chemical abundances observed
openaire +2 more sources
Red giant evolution in modified gravity [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 In this paper, we study the chameleon profile in inhomogeneous density distributions and find that the fifth force in thin shell near the surface is weaker from what expected in homogeneous density distributions. Also, we check the validity of quasi-static approximation for the chameleon scalar field in the astrophysical time scales.
Mohammad Taghi Mirtorabi +3 more
openaire +4 more sources
Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst
Advanced Functional Materials, EarlyView.This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu +3 more
wiley +1 more source
Mitochondrial DNA. Part B. Resources, 2020 Red-and-white giant flying squirrel (Petaurista alborufus) is a widely distributed but rarely studied species. Here, we sequenced the complete mitochondrial genome about it, which is a circular genome of 16,511 bp and have a typical structure with ...
Lin Zhang +10 more
doaj +1 more source
Large-scale measurements of the red giant core rotation through asteroseismology [PDF]
arXiv, 2017 Red giant stars are solar-like pulsators presenting mixed-modes. Such modes consist in a coupling between pressure waves propagating in the external convective envelope and gravity waves propagating in the radiative interior. Therefore, the red giant asteroseismology provides us with a direct view on their core and opens the possibility to monitor the ...
arxiv
Near‐Field Phonon Nanoscopy and Imaging of Structural Variants in Mixed Phase BiFeO3
Advanced Functional Materials, EarlyView.Nano‐Fourier transform infrared spectroscopy and scattering scanning near‐field optical microscopy imaging reveal the phonon response of nanoscale phase variants in mixed‐phase BiFeO3 (BFO). Direct mid‐infrared imaging of associated distinct vibrational signatures is used as a non‐invasive optical detection method for electrical switching of ...
Dawei Zhang +8 more
wiley +1 more source
Li Evolution among Stars of Low/Intermediate Mass: the Metal-deficient Open Cluster NGC 2204
The Astronomical JournalWe have analyzed high-dispersion spectra in the Li 6708 Å region for 167 stars within the anticenter cluster NGC 2204. From 105 probable members, abundance analysis of 45 evolved stars produces [Fe/H] = −0.40 ± 0.12, [Si/Fe] = 0.14 ± 0.12, [Ca/Fe] = 0.29
Barbara J. Anthony-Twarog +4 more
doaj +1 more source
EPJ Web of Conferences, 2015 As the Kepler time series grew, so did the interest in the asteroseismology of very low-frequency solar-like oscillators. It is possible to accurately resolve modes for stars near the tip of the red giant branch.
Compton Douglas L. +2 more
doaj +1 more source
Red giant variables: OGLE--II and MACHO [PDF]
Mem.Soc.Ast.It.77:303-306,2006, 2005 We review the recent impact of microlensing projects on our understanding of pulsating red giant stars. Discussed are red giant stars' pulsation properties (period--luminosity relations, period changes, mode switchings), Red Giant Branch pulsations, metallicity effects and the use of red giant variables to explore galactic structure.
arxiv