Results 61 to 70 of about 3,556 (304)

A Survey for Spectroscopic Binaries among Very Low Mass Stars [PDF]

The Astronomical Journal, 2006
We report on the results of a survey for radial velocity variability in a heterogeneous sample of very low-mass stars and brown dwarfs. One distinguishing characteristic of the survey is its timespan, which allows an overlap between spectroscopic binaries and those which can be found by high angular-resolution imaging.
Basri, Gibor, Reiners, Ansgar
openaire   +2 more sources

Observations of binary stars with the differential speckle survey instrument. V. Toward an empirical metal-poor mass-luminosity relation

, 2015
In an effort to better understand the details of the stellar structure and evolution of metal-poor stars, the Gemini North telescope was used on two occasions to take speckle imaging data of a sample of known spectroscopic binary stars and other nearby ...
Everett, Mark E., Ciardi, David R., Horch, Elliott P., Winters, Jennifer G., Van Altena, William F., Demarque, Pierre, Howell, Steve B., Teske, Johanna K., Henry, Todd J.   +8 more
core   +1 more source

Exciton Binding Energy of Phosphorescent Emitter Molecules in Organic Light‐Emitting Diodes

Advanced Functional Materials, EarlyView.
Energy level alignment is key to efficient OLED design, yet determining LUMO energies remains challenging. A methodology based on field‐induced dissociation and kinetic Monte Carlo simulations is presented to extract LUMO energies of iridium‐based phosphorescent emitters from their exciton binding energy.
Hiroki Tomita, Lucas R. L. Norg, Patrick Diederen, Clint van Hoesel, Christ H. L. Weijtens, Peter A. Bobbert, Reinder Coehoorn   +6 more
wiley   +1 more source

Diversity in Evolutionary Status and Magnetic Activity among Solar-type Twin Detached Eclipsing Binaries

The Astrophysical Journal Supplement Series
We present a combined photometric and spectroscopic analysis of four detached eclipsing binaries (KIC 8957954, KIC 10593759, KIC 8302455, and TIC 207398432), all of which exhibit composite G-type spectra and nearly equal mass ratios. Based on survey data
Fang-Bin Meng, Li-Ying Zhu, Sheng-Bang Qian, Lin-Jia Li, David Mkrtichian, Nian-Ping Liu, Ahmet Dervişoğlu, Er-Gang Zhao, Boonrucksar Soonthornthum, Sergey Zvyagintsev, Somsawat Rattanasoon, Jia Zhang   +11 more
doaj   +1 more source

Separation of composite spectra: the spectroscopic detection of an eclipsing binary star [PDF]

Astronomy & Astrophysics, 2006
We present an iterative method that allows us to compute the individual spectra and radial velocities of the two stellar components of spectroscopic binaries. We applied this method to HD 143511 and detected the occurrence of eclipses at the conjunction phases. The orbital analysis provides minimum masses with errors of 1%.
Gonzalez, Jorge Federico, Levato, Orlando Hugo   +1 more
openaire   +2 more sources

A search for spectroscopic binaries among Herbig Ae/Be stars?;??

, 1998
. We present the results of a spectroscopic sur-vey of binaries among 42 bright (mV < 11) Herbig Ae/Be stars in both hemispheres. Radial velocity vari-ations were found in 7 targets, 4 are new spectroscopic binaries.
A.-M. Lagrange, A. -m. Lagrange, P. Corporon   +2 more
core   +1 more source

Swelling‐Induced Stress‐Assisted Transfer of Nanodiamond Arrays With a PVA Carrier Tape for Conformal Bio‐Integrated Sensing and Labelling

Advanced Functional Materials, EarlyView.
This work introduces a swelling‐induced, stress‐assisted water‐soluble PVA tape strategy to transfer‐print nanodiamond quantum‐sensor arrays onto soft, curved biological interfaces. The room‐temperature, water‐triggered process achieves >98% fidelity and residue‐free integration, enabling conformal quantum sensing on contact lenses, neural probes, and ...
Luyao Zhang, Lingzhi Wang, Xinhao Hu, Tai Nam Yip, Mingze Sun, Jixiang Jing, Lizhi Xu, Yuan Lin, Yong Hou, Zhiqin Chu   +9 more
wiley   +1 more source

Searching for Spectroscopic Multiple-star Systems in the LAMOST Medium-Resolution Spectroscopic Survey

The Astrophysical Journal Supplement Series
We employed the Gaussian decomposition package Gausspy+ to autonomously identify multipeak features in the cross-correlation functions (CCFs) of spectra from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Medium-Resolution Survey (
Yuxin Han, Kai Li, Xiang Gao
doaj   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source

paired: A Statistical Framework for Detecting Stellar Binarity with Gaia RVs. I. Sensitivity to Unresolved Binaries

The Astrophysical Journal
Data Release 3 (DR3) from the Gaia Mission includes radial velocity measurements of over 33 million targets. Among many scientific applications, the overlap of this stellar sample with targeted exoplanet transit survey stars presents an opportunity to ...
Quadry Chance, Daniel Foreman-Mackey, Sarah Ballard, Andrew R. Casey, Trevor J. David, Adrian M. Price-Whelan   +5 more
doaj   +1 more source