Results 101 to 110 of about 185,965 (314)

Metallicity of the Double Red Clump in the Milky Way Bulge

The Astrophysical Journal
We present a reanalysis of the metallicity of the double red clump (RC) stars from the Milky Way bulge. Two leading explanations for the existence of the double RC concern possible differences in chemical composition (multiple populations of stars) or ...
Zofia Budzik, Matylda Łukaszewicz, Radosław Poleski   +2 more
doaj   +1 more source

When do stars in 47 Tucanae lose their mass? [PDF]

, 2015
By examining the diffusion of young white dwarfs through the core of the globular cluster 47 Tucanae, we estimate the time when the progenitor star lost the bulk of its mass to become a white dwarf.
Antolini, Elisa, Goldsbury, Ryan, Heyl, Jaremy, Kalirai, Jason, Marigo, Paola, Parada, Javiera, Richer, Harvey   +6 more
core   +2 more sources

Unveiling Novel Viral Diversity, Biogeography, and Host Networks in Wildlife Through High‐Throughput Sequencing Data Mining

Advanced Science, EarlyView.
Analysis of 57 536 high‐throughput sequencing datasets uncovers a vast, hidden world of viruses in wildlife. The researchers reveal significant geographic and host‐specific patterns of viruses, and their surprising cross‐species transmissions, such as avian flu viruses infecting goats.
Hai Wang, Yafei Meng, Xiaoyuan Chen, Xinyuan Cui, Qian Zuo, Na Han, Xianghui Liang, Xuejuan Shen, Caiwu Li, Desheng Li, Fumin Wang, Liangping He, Rujian Chen, Xingbang Lu, Wenjie You, Aiping Wu, Rui‐Ai Chen, Wu Chen, Chan Ding, Yongyi Shen   +19 more
wiley   +1 more source

Revealing the Fate of Exoplanet Systems: Asteroseismic Identification of Host Star in the Red Clump or Red Giant Branch

The Astrophysical Journal Letters
Determining the evolutionary stage of stars is crucial for understanding the evolution of exoplanetary systems. In this context, red giant branch (RGB) and red clump (RC) stars, which formed at stages in the later evolution of stars situated before and ...
Wen-Xu Lin, Sheng-Bang Qian, Li-Ying Zhu
doaj   +1 more source

Indoor Organic Photovoltaics with Over 29% Efficiency and Great Stability Enabled by Giant Dimeric Acceptors with Hypsochromic Absorption and High Glass Transition Temperature

Advanced Science, EarlyView.
Through a systematical investigation of structure‐performance relationship from the small‐molecule acceptor to giant molecule acceptors (GDAs) and polymer acceptor, a fluorinated GDA is reported with hypsochromic absorption and high glass transition temperature. The resulting devices demonstrate a remarkable efficiency of 29.1% under indoor conditions,
Bosen Zou, Ho Ming Ng, Zhengkai Li, Yan Wang, Qingyuan Wang, Dezhang Chen, Zefan Yao, Hongxiang Li, Chunliang Li, Xianghao Zeng, Wei Liu, Jonathan E. Halpert, Huawei Hu, Chunhui Duan, Zonglong Zhu, Tom Wu, Wai‐Yeung Wong, Zhi‐Guo Zhang, He Yan, Han Yu   +19 more
wiley   +1 more source

Near-Infrared photometry of four metal-rich Bulge globular clusters: NGC6304, NGC6569, NGC6637, NGC6638

, 2005
We present high-quality near-Infrared photometry of four Bulge metal-rich globular clusters, namely: NGC 6304, NGC 6569, NGC 6637 and NGC 6638. By using the observed Colour-Magnitude Diagrams we derived a photometric estimates of the cluster reddening ...
Bellazzini, Bellazzini, Caloi, Carretta, Carretta, Castellani, Clement, Cohen, Davidge, E. Valenti, F. R. Ferraro, Ferraro, Ferraro, Ferraro, Ferraro, Ferraro, Frogel, Fusi Pecci, Guarnieri, Harris, Heitsch, L. Origlia, McWilliam, Momany, Monaco, Montegriffo, Origlia, Origlia, Origlia, Ortolani, Ortolani, Ortolani, Ortolani Bica, Piotto, Rich, Riello, Rosenberg, Salaris, Savage, Schlegel, Sollima, Stetson, Straniero, Valenti, Valenti, Valenti, Zinn, Zoccali, Zoccali   +48 more
core   +1 more source

Distinct Phage‐Encoded Enzymes for Substitution of Deoxythymidine by Deoxyuridine in Phage Genomes

Advanced Science, EarlyView.
Distinct enzymes including dCTP deaminases (Dcds), dTMP phosphatases (Dtms), and dTTP pyrophosphatases (Dtt) are found to be responsible for dU‐DNA biosynthesis in the phages PBS1, DSS3_VP1, and PhiR1‐37. Both PhiR1‐37‐derived and synthetic dU‐DNA are resistant to cleavage by restriction enzymes and Cas12a nuclease targeting dT‐containing sites.
Yating Li, Jason Tan, Yanqin Tu, Jingnan Wu, Zaifang Zhang, Yifeng Wei, Xinan Jiao, Yan Zhou   +7 more
wiley   +1 more source

Post-AGB Binaries as Interacting Systems

Galaxies
We present recent progress in our understanding of the physical interaction mechanisms at work in evolved binaries of low-to-intermediate initial mass, which are surrounded by a stable disc of gas and dust.
Hans Van Winckel
doaj   +1 more source

Defect Engineering via Vacuum Annealing: Precise Selenium Vacancy Control for High‐Performance InSe Photodetectors

Advanced Electronic Materials, EarlyView.
A low‐temperature and high‐vacuum annealing strategy precisely tunes ultrathin InSe device properties. It induces effective n‐type doping in InSe, enhancing mobility and photoresponsivity by one to two orders of magnitude. XPS analysis confirms that the controlled generation of Se vacancies (VSe) drives these enhancements by modulating charge transport
Yi Liu, Xinlei Zhang, Wan Qu, Dan Zheng, Zhengyi Sun, Zhuochen Cai, Shixuan Guo, He Huang, Tao Wang, Qinghua Zhao   +9 more
wiley   +1 more source

From the atmosphere to the circumstellar environment in cool evolved stars

, 2014
We discuss and illustrate contributions that optical interferometry has made on our current understanding of cool evolved stars. We include red giant branch (RGB) stars, asymptotic giant branch (AGB) stars, and red supergiants (RSGs).
Paladini, Claudia, Wittkowski, Markus
core   +1 more source