Results 121 to 130 of about 2,916,203 (242)

Synthetic Population of Binary Cepheids. II. The Effect of Companion Light on the Extragalactic Distance Scale

The Astrophysical Journal, 2023
Because of their period–luminosity relation (PLR), classical Cepheids play a key role in the calibration of the extragalactic distance scale and the determination of the Hubble–Lemaître constant H _0 .
Paulina Karczmarek, Gergely Hajdu, Grzegorz Pietrzyński, Wolfgang Gieren, Weronika Narloch, Radosław Smolec, Grzegorz Wiktorowicz, Krzysztof Belczynski   +7 more
doaj   +1 more source

Astrometry with Hubble Space Telescope: A Parallax of the Fundamental Distance Calibrator RR Lyrae [PDF]

, 2001
We present an absolute parallax and relative proper motion for the fundamental distance scale calibrator, RR Lyr. We obtain these with astrometric data from FGS 3, a white-light interferometer on HST. We find $\pi_{abs} = 3.82 \pm 0.2$ mas.
A. J. Bradley, A. L. Whipple, B. E. McArthur, Benedict G. F., Bergeat J., C. L. Slesnick, D. Story, E. Nelan, Feast M. W., Feast M. W., Fernley J., G. Fritz Benedict, Groenewegen M. A. T., Groenewegen M. A. T., Guinan E. F., Hanson R. B., J. Lee, J. Rhee, Kovacs G., L. H. Wasserman, L. W. Fredrick, Laney C. D., Luri X., Maloney F. P., Monet D. G., O. G. Franz, P. D. Hemenway, P. J. Shelus, Paczynski B., Paltoglou G., Perryman M. A. C., R. J. Patterson, R. L. Duncombe, Schmidt-Kaler Th., Standish E. M., Jr., Stanek K. Z., T. E. Harrison, Udalski A., Udalski A., Udalski A., Udalski A., van Leeuwen F., W. H. Jefferys, W. van Altena, Wood P. R.   +44 more
core   +3 more sources

In situ characterization of high-temperature mechanical behaviors of freestanding Si, BSAS and Yb2SiO5 environmental barrier coatings by three-point bending tests based on digital image correlation

Results in Surfaces and Interfaces, 2023
The high-temperature mechanical properties and failure mechanisms of Si, BSAS and Yb2SiO5 ceramic materials are important for environmental barrier coatings.
Xizhi Fan, Xixing Deng, Weiguo Mao, Zhangji Luo, Wenjie Ye, Cuiying Dai   +5 more
doaj  

Revisiting the refined Distance Conjecture

Journal of High Energy Physics, 2023
The Distance Conjecture of Ooguri and Vafa holds that any infinite-distance limit in the moduli space of a quantum gravity theory must be accompanied by a tower of exponentially light particles, which places tight constraints on the low-energy effective ...
Tom Rudelius
doaj   +1 more source

Broad modulus range nanomechanical mapping by magnetic-drive soft probes

Nature Communications, 2017
Stiffness matching between the probe and deformed portion of the sample in piezo-drive peak force modulation atomic force microscopy (AFM) limits the modulus measurement range of single probes.
Xianghe Meng, Hao Zhang, Jianmin Song, Xinjian Fan, Lining Sun, Hui Xie   +5 more
semanticscholar   +1 more source

THE YOUNG AND BRIGHT TYPE IA SUPERNOVA ASASSN-14lp: DISCOVERY, EARLY-TIME OBSERVATIONS, FIRST-LIGHT TIME, DISTANCE TO NGC 4666, AND PROGENITOR CONSTRAINTS [PDF]

, 2015
On 2014 December 9.61, the All-sky Automated Survey for SuperNovae (ASAS-SN or “Assassin”) discovered ASASSN-14lp just ∼2 days after first light using a global array of 14 cm diameter telescopes.
B. Shappee, A. Piro, T. Holoien, J. Prieto, J. Prieto, C. Contreras, C. Contreras, K. Itagaki, C. Burns, C. Kochanek, K. Stanek, E. Alper, U. Basu, J. Beacom, D. Bersier, J. Brimacombe, E. Conseil, A. B. Danilet, S. Dong, E. Falco, D. Grupe, E. Hsiao, E. Hsiao, E. Hsiao, S. Kiyota, N. Morrell, J. Nicolas, M. Phillips, G. Pojmański, G. Simonian, M. Stritzinger, M. Stritzinger, D. Szczygieł, F. Taddia, T. Thompson, J. Thorstensen, M. Wagner, M. Wagner, P. Wo'zniak   +38 more
semanticscholar   +1 more source

Utilization of waste dolomite dust in carbon fiber reinforced vinylester composites

Journal of Materials Research and Technology, 2022
The present study was designed to explore the applicability of dolomite dust (a waste from a dolomite quarry) as filler in polymer composites. Therefore, fixed carbon fiber reinforced vinyl ester composites with varying dolomite dust proportions (0, 5 ...
Brijesh Gangil, Lalit Ranakoti, Shashi Kant Verma, Tej Singh   +3 more
doaj  

Cluster AgeS Experiment (CASE): RR Lyrae stars from the globular cluster Omega Centauri as standard candles

, 2003
New photometry of RRab and RRc stars in Omega Cen is used to calibrate their absolute magnitudes M_V as a function of: a) metallicity; and b) the Fourier parameters of light curves in the V band. The zero point of both calibrations relies on the distance
A. Olech, A. Schwarzenberg-Czerny, Alves, Butler, Caloi, Caputo, Caputo, Chaboyer, Clementini, Dutra, Fitzpatrick, Fusi Pecci, Gould, Gratton, Groenewegen, Harris, I. B. Thompson, J. Kaluzny, Kaluzny, Kaluzny, Kaluzny, Kovács, Kovács, Kovács, Lee, Lee, Ligeza, Pietrzyński, Rey, Sandage, Sandage, Sarajedini, Schlegel, Schwarzenberg-Czerny, Schwarzenberg-Czerny, Sebo, Simon, Simon, Simon, Thompson, Udalski, Udalski, van Leeuwen, Walker, Walker, Zebruń, Zinn   +46 more
core   +1 more source

Evaluation of corneal elastic modulus based on Corneal Visualization Scheimpflug Technology

BioMedical Engineering OnLine, 2019
Background Corneal biomechanical properties are important for the diagnosis of corneal diseases, individualized design and prognosis of corneal surgery.
Xiao Qin, Lei Tian, Haixia Zhang, Xinyan Chen, Lin Li   +4 more
doaj   +1 more source

Inverse Estimation Method of Material Randomness Using Observation

Crystals, 2020
This study proposes a method for inversely estimating the spatial distribution characteristic of a material’s elastic modulus using the measured value of the observation data and the distance between the measurement points.
Dae-Young Kim, Pawel Sikora, Krystyna Araszkiewicz, Sang-Yeop Chung   +3 more
doaj   +1 more source