Results 91 to 100 of about 58,665 (312)

The Amateur and Eclipsing Binary Stars [PDF]

International Astronomical Union Colloquium, 1988
Probably no other branch of science has benefited as much from the work of dedicated amateurs as has the science of Astronomy. While some amateurs have made many useful types of astronomical observations– comets, meteors, occultations, etc. – perhaps none has been as extensive and as useful as those made in the field of variable stars.
openaire   +1 more source

Spectrophotometry of massive eclipsing binary stars

The Astrophysical Journal Supplement Series, 1979
Normalized flux distributions were measured for U Ophiuchi, AG Persei, lambda Tauri, and V356 Sagitarii from 1976 July to 1978 March. The spectra of lambda Tauri match those of a B4 star and an A4 star at phases 0.77--9.90, and those of a B3 star and an A4 star at other phases.
G. L. Clements, J. S. Neff
openaire   +1 more source

The binary properties of the pulsating subdwarf B eclipsing binary PG 1336-018 (NY Virginis) [PDF]

, 2007
Aims. We present an unbiased orbit solution and mass determination of the components of the eclipsing binary PG1336−018 as a critical test for the formation scenarios of subdwarf B stars. Methods. We obtained high-resolution time series VLT/UVES spectra
Al-Naimiy, Behara, Brassard, Briquet, C. Aerts, C. S. Jeffery, Charpinet, Charpinet, Charpinet, Dhillon, Dorman, Drechsel, Dreizler, Dupret, Fukugita, Fusi-Pecci, G. Nelemans, Gaudi, Giménez, Green, Green, H. Hu, Han, Han, Heber, Heber, Hekker, Jeffery, Kilkenny, Kilkenny, Kilkenny, Kilkenny, M. Vučković, Mathias, McLaughlin, Morales-Rueda, Morales-Rueda, Mukai, Napiwotzki, Nelemans, Nelemans, Ohta, Prsa, Queloz, R. Østensen, Randall, Rauch, Rossiter, T. R. Marsh, V. S. Dhillon, Wade, Wilson, Wood, Zima, Zola   +54 more
core   +4 more sources

KEPLER ECLIPSING BINARY STARS. III. CLASSIFICATION OF KEPLER ECLIPSING BINARY LIGHT CURVES WITH LOCALLY LINEAR EMBEDDING [PDF]

, 2012
We present an automated classification of 2165 Kepler eclipsing binary (EB) light curves that accompanied the second Kepler data release. The light curves are classified using locally linear embedding, a general nonlinear dimensionality reduction tool ...
G. Matijevič, A. Prša, J. Orosz, W. Welsh, S. Bloemen, T. Barclay   +5 more
semanticscholar   +1 more source

An Opto‐Actuated Hydrogel for Cell Mechanoactuation and Real‐Time Force Monitoring

Advanced Science, EarlyView.
Researchers developed a mechanoactuated hydrogel interface where nanomachines exert forces on adhesion receptors and allow monitoring of traction force responses in real time. They demonstrate reversible talin recruitment, enhanced F‐actin polymerization, and a reduction in cell traction force when force is locally applied to focal adhesions of ...
Rinku Kumar, Marc A. Fernandez‐Yague, Adrien Bessaguet, Hosoowi Lee, Nicolas Giuseppone, Andrés J. García, Aránzazu del Campo   +6 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  

Variables in the Southern Polar Region Evryscope 2016 Dataset [PDF]

, 2019
The regions around the celestial poles offer the ability to find and characterize long-term variables from ground-based observatories. We used multi-year Evryscope data to search for high-amplitude (~5% or greater) variable objects among 160,000 bright ...
Barlow, Brad N., Corbett, Henry T., del Ser, Daniel, Fors, Octavi, Glazier, Amy, Howard, Ward S., Law, Nicholas M., Ratzloff, Jeffrey K., Trifonov, Trifon   +8 more
core   +3 more sources

A Trypsin‐Like Serine Protease ZmNAL1a Fine‐Tunes Maize Floral Transition and Flowering Time

Advanced Science, EarlyView.
This study identifies a trypsin‐like serine protease, ZmNAL1a, that moves from leaves to the shoot apical meristem. ZmNAL1a promotes the floral transition by degrading TOPLESS‐like corepressor REL2, which thereby enhances the expression of key flowering genes through elevating histone acetylation and relieving REL2–ZmEREBP147‐mediated transcriptional ...
Nan Li, Qiang Ning, Zhen Li, Qian Zhang, Peilu Zhu, Jimin Zhan, Yunfu Li, Zhen Li, Liang Dong, Qing Xiong, Jiahao Liao, Jie Liu, David Jackson, Munenori Kitagawa, Zuxin Zhang, Lei Liu   +15 more
wiley   +1 more source

Accurate fundamental parameters of eclipsing binary stars [PDF]

Proceedings of the International Astronomical Union, 2004
The study of detached eclipsing binaries is one of the most powerful ways to investigate the properties of individual stars and stellar systems. We present preliminary masses, radii and effective temperatures for the eclipsing binary WW Aurigae, which is composed of two metallic-lined A-type stars.
Southworth, J, Smalley, B, Maxted, PFL, Etzel, PB   +3 more
openaire   +3 more sources

Search for Variable Stars in the Globular Cluster M3 [PDF]

, 1997
We describe here results of a photometric time-sequence survey of the globular cluster M3 (NGC 5272), in a search for contact and detached eclipsing binary stars.
Clement, C., Hilditch, R. W., Kaluzny, J., Rucinski, S. M.   +3 more
core   +2 more sources