Results 101 to 110 of about 42,354 (272)

A Systematic Search for Big Dippers in ASAS-SN

The Open Journal of Astrophysics
Dipper stars are extrinsically variable stars with deep dimming events due to extended, often dusty, structures produced by a wide range of mechanisms such as collisions, protoplanetary evolution or stellar winds.
B. JoHantgen, D. M. Rowan, R. Forés-Toribio, C. S. Kochanek, K. Z. Stanek, B. J. Shappee, Subo Dong, J. L. Prieto, Todd A. Thompson   +8 more
doaj   +1 more source

The XO Planetary Survey Project - Astrophysical False Positives

, 2010
Searches for planetary transits find many astrophysical false positives as a by-product. There are four main types analyzed in the literature: a grazing-incidence eclipsing binary star, an eclipsing binary star with a small radius companion star, a blend
Beatty, Brown, Burke, Burke, Burke, Charbonneau, Christopher J. Burke, Creevey, Dommanget, Drilling, Garcia-Melendo, Hoyer, Jeff A. Valenti, Johns-Krull, Kenneth Janes, Kurucz, McCullough, McCullough, Minniti, Nidever, O’Donovan, Pavel Machalek, Peter R. McCullough, Radosaw Poleski, Skrutskie   +24 more
core   +1 more source

Simvastatin Restores Uteroplacental Hemodynamics and Trophoblast Function in Obstetric Antiphospholipid Syndrome in a Placenta‐on‐a‐Chip Model

Advanced Healthcare Materials, EarlyView.
Simvastatin mitigates placental hypoperfusion in OAPS by ameliorating abnormal uteromaternal hemodynamics and enhancing trophoblast invasion via optimized endothelial cell interactions under pathological shear stress, as evidenced by results from a placenta‐on‐a‐chip platform.
Hongli Liu, Yuan Wang, Yanjun Cai, Ruixin Guo, Shunhua Liu, Tingting Chen, Tingting Sun, Ruiheng Huo, Tengwei Liu, Qingfeng Lv, Xietong Wang   +10 more
wiley   +1 more source

Two Young Eclipsing Binaries in Orion with Temperatures and Radii Affected by Spots and Third Bodies

The Astronomical Journal
In this work we present a model of two young eclipsing binaries in the Orion complex. Both heavily spotted, they present radii and temperatures that are in disagreement with the predictions of standard stellar models.
Marina Kounkel, Keivan G. Stassun
doaj   +1 more source

Dynamic Modulation of the Microenvironment Promotes Functional Maturation of Engineered Tissues

Advanced Healthcare Materials, EarlyView.
Engineered tissues lack the dynamic microenvironment of native tissues. A biocompatible, diffusible small molecule to dynamically modulate tissue microenvironments during maturation is used. Timing‐dependent modulation yields distinct outcomes, producing thicker, more native‐like blood vessels, stronger and more mature cardiac tissues, and optimized ...
Eric Silberman, Hadas Oved, Itay Gil, Amgad Marzook, Ester Sapir Baruch, Yahel Shechter, Assaf Shapira, Tal Dvir   +7 more
wiley   +1 more source

A Search of Periodic Variable Stars in the LMC by JWST Photometry

The Astrophysical Journal Supplement Series
Based on high-resolution near-infrared photometric data from the James Webb Space Telescope (JWST) targeting the Large Magellanic Cloud, this study attempts to evaluate the feasibility and sensitivity limits of variable star detection in crowded stellar ...
Jiyu Wang, Xiaodian Chen, Jianxing Zhang, Ziming Yan, Shu Wang, Licai Deng   +5 more
doaj   +1 more source

Determination of tidal distortion in the eclipsing binary system V621 Cen by means of deviations from the third Kepler law

, 2008
In this paper we determine the tidal distortion parameter k_m of the secondary partner (mass loser) of the semi-detached eclipsing binary system V621 Cen by comparing the phenomenologically determined orbital period P_b=3.683549(11) d to the Keplerian ...
Barblan, Christiansen, Claret, Cowling, Damour, Lorenzo Iorio, Marsh, Russell, Southworth, Sterne   +9 more
core   +1 more source

A Modular Bioinstructive Platform Reveals Mechanistic Insights into Additive‐Free, Topography‐Driven Osteogenesis

Advanced Healthcare Materials, EarlyView.
Engineered microparticle topographies direct human mesenchymal stem cell osteogenesis without biochemical additives. This osteogenic commitment is driven by canonical Hedgehog signaling and followed by temporal IGF‐II engagement. Two‐photon polymerization demonstrates spatial control, enabling the engineering of topographical gradients that pattern ...
Fatmah I. Ghuloum, Leo A. H. Zeef, Lee A. Stevens, Marco A. N. Domingos, Susan J. Kimber, Mahetab H. Amer   +5 more
wiley   +1 more source

Modelling of W UMa-type variable stars

South African Journal of Science, 2009
W Ursae Majoris (W UMa)-type variable stars are over-contact eclipsing binary stars. To understand how these systems form and evolve requires observations spanning many years, followed by detailed models of as many of them as possible.
P. Skelton, D. Smits
doaj  

THE SIGNIFICANCE OF USING HIGHER ORDER POLYNOMIALS TO DESCRIBE THE (O-C) DIAGRAMS OE ECLIPSING BINARIES

Odessa Astronomical Publications, 2017
The principal aim of the present study is to underline the significance of using higher order polynomials to describe the (O-C) diagrams of eclipsing binary systems.
H. Rovithis-Livaniou, P. Rovithis, A. Kalimeris   +2 more
doaj   +1 more source