Results 61 to 70 of about 97,045 (300)

ON THE RADIAL DISTRIBUTION OF HORIZONTAL BRANCH STARS IN NGC 2808

The Astrophysical Journal, 2009
We present accurate new ultraviolet and optical BVI photometry for the Galactic globular cluster ngc2808, based on both ground-based and archival HST imagery. From this we have selected a sample of ~2,000 HB stars; given the extensive wavelength range considered and the combination of both high-angular-resolution and wide-field photometric coverage ...
Iannicola G, Monelli M, Bono G, Stetson PB, Buonanno R, Calamida A, Zoccali M, Caputo F, Castellani M, Corsi CE, Dall'Ora M, Di Cecco A, DEGL'INNOCENTI, SCILLA, Ferraro I, Nonino M, Pietrinferni A, Pulone L, PRADA MORONI, PIER GIORGIO, Romaniello M, Sanna N, Walker AR   +20 more
openaire   +8 more sources

A Spectroscopic Survey of Field Red Horizontal-branch Stars [PDF]

The Astronomical Journal, 2018
Abstract A metallicity, chemical composition, and kinematic survey has been conducted for a sample of 340 candidate field red horizontal-branch (RHB) stars. Spectra with high resolution and high signal-to-noise ratio were gathered with the McDonald Observatory 2.7 m Tull and the Hobby–Eberly Telescope echelle spectrographs, and were used
Melike Afşar, Zeynep Bozkurt, Gamze Böcek Topcu, Dana I. Casetti-Dinescu, Christopher Sneden, Gizem Şehitog̅lu   +5 more
openaire   +4 more sources

Directional Flow of Confined Polaritons in CrSBr

Advanced Materials, EarlyView.
CrSBr, a layered magnetic semiconductor, naturally channels self‐hybridized excitonpolaritons into highly directional flow. Its intrinsic optical anisotropy, high refractive index, and strong lightmatter coupling enable long‐range guided modes along the a‐axis, with propagation lengths set by their excitonphoton admixture.
Pratap Chandra Adak, Sichao Yu, Jaime Abad‐Arredondo, Biswajit Datta, Andy Cruz, Sorah Fischer, Kseniia Mosina, Zdeněk Sofer, Antonio I. Fernández‐Domínguez, Francisco J. Garcia‐Vidal, Vinod M. Menon   +10 more
wiley   +1 more source

The Origin of Extreme Horizontal Branch Stars [PDF]

The Astrophysical Journal, 1996
Strong mass loss on the red giant branch (RGB) can result in the formation of extreme horizontal branch (EHB) stars. The EHB stars spend most of their He core and shell burning phase at high temperatures and produce copious ultraviolet flux. They have very small hydrogen envelopes and occupy a small range in mass.
d'Cruz, Noella Lambert, Dorman, Ben, Rood, Robert T., O'Connell, Robert W.   +3 more
openaire   +2 more sources

Search for stellar spots in field blue horizontal-branch stars

, 2019
Context. Blue horizontal-branch stars are Population II objects which are burning helium in their core and possess a hydrogen-burning shell and radiative envelope.
E. A. Semenko, E. Paunzen, J. Janík, I. A. Yakunin, S. Hümmerich, K. Bernhard   +5 more
core   +1 more source

3D Anodic Alumina Nanoarchitectures: A Decade of Progress from Foundational Science to Functional Metamaterials

Advanced Materials, EarlyView.
Ordered three‐dimensional anodic aluminum oxide (3D‐AAO) nanoarchitectures with longitudinal and transverse pores enable architecture‐driven metamaterials. The review maps fabrication advances, including hybrid pulse anodization, and shows how 3D‐AAO templates tailor properties across magnetism, energy, catalysis, and sensing.
Marisol Martín‐González
wiley   +1 more source

Investigation of Squeezed Branch Pile Capacity Under Combined Horizontal–Uplift Loading

Buildings
This paper investigates the bearing behavior of squeezed branch piles and straight-shaft piles under uplift and combined horizontal–uplift loading in silty clay strata. Utilizing a combined approach of laboratory model tests and numerical simulation, the
Tian Deng, Kun Peng, Panpan He, Zhaoji Hu   +3 more
doaj   +1 more source

Thermodynamic Limits to Molecular Doping in Conjugated Polymers: A Perspective on Phase Behavior and Miscibility

Advanced Materials, EarlyView.
Molecular doping of conjugated polymers is fundamentally constrained by thermodynamic phase behavior. This Perspective reframes doping efficiency and stability in terms of miscibility limits, binodals, and solvus boundaries, highlighting the role of effective interaction parameters and charge transfer.
Somayeh Kashani, Justin Neu, Sung‐Joo Kwon, Runqio Song, Zixuan Chen, Tajah Trapier, Paschalis Gkoupidenis, David Ginger, Wei You, Jasper J. Michels, Harald Ade   +10 more
wiley   +1 more source

Responsive change in local resistances and adjacent influencing characteristics to the combined deformation of elbow and tee pipes

Guan'gai paishui xuebao
【Objective】 The objective of this paper is to explore the response of local resistance and adjacent influence characteristics to combined deformation of elbow and tee pipes in irrigation water transmission network. 【Method】 The combined deformation parts
SHI Xi, TIAN Yunxia, GONG Li, TAO Hu, TAN Chunbin   +4 more
doaj   +1 more source

Mechanically Spatio‐Chimeric Fibrin Assembly Enables Vascular‐Integrated Muscle Reconstruction for Volumetric Muscle Loss Repair

Advanced Materials, EarlyView.
SPARC (spatio‐chimeric, plasma‐based, anisotropic, and shear‐responsive construct) that integrates myogenic and vascular microenvironments within a single construct. The dual‐modulus matrix directs aligned myotube formation and endothelial network development, enabling a vascularized muscle implant that seamlessly anastomoses with host tissue and ...
Su Hyun Jung, Minjun Kim, Da‐Yoon Kim, Min Kyu Kim, Sieun Lee, Yoonhee Jin, Joo H. Kang   +6 more
wiley   +1 more source