Results 31 to 40 of about 458,423 (289)

The Stellar Populations of the Carina Dwarf Spheroidal Galaxy: I. a New Color-Magnitude Diagram for the Giant and Horizontal Branches

, 1994
We report on the first in a series of studies of the Carina dwarf spheroidal galaxy, a nearby satellite of our Galaxy. Our two major results are: 1) precise BI photometry ($\sigma_{B-I} \simlt 0.05$ for $V \simlt 22$) for 11,489 stars in the Carina field,
Hesser, J. E., Lehnert, M. D., Smecker-Hane, T. A., Stetson, P. B.   +3 more
core   +1 more source

Solution‐Processable and Ambient‐Stable Highly Conductive p‐Type Polymers Derived from Dihydropyrazine and Ethylenedioxythiophene

Advanced Functional Materials, EarlyView.
This work presents π–conjugated polymers based on dihydropyrazine (DHP) and ethylenedioxythiophene (EDOT), developed to produce highly conductive, flexible films for printed electronics. By optimizing the DHP and EDOT ratio, strong and compact π–π stacking is achieved, resulting in polymer films with conductivities up to 1700 S cm−1 under ambient ...
Sung Jae Jeon, Naixin Zhao, Yi Yuan, Yuning Li   +3 more
wiley   +1 more source

Evolution of Hard X-Ray Spectra Along the Branches in Cir X-1

, 2003
Using the data from the PCA and HEXTE on board the RXTE satellite, we investigate the evolution of the 3-200 keV spectra of the peculiar low mass X-ray binary (LMXB) Cir X-1 along the branches on its hardness-intensity diagram (HID) from the vertical ...
Asai K., Brandt W. N., G. Q. Ding, Glass I. S., Hasinger G., J. L. Qu, Moneti A., Oosterbroek T., Protassov R. S., T. P. Li, Tennant A. F., Tennant A. F., Whelan J. A. J.   +12 more
core   +2 more sources

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

Hot subdwarf stars in close-up view - II. Rotational properties of single and wide binary subdwarf B stars

, 2012
Subluminous B stars (sdBs) form the extremely hot end of the horizontal branch and are therefore related to the blue horizontal branch (BHB) stars. While the rotational properties of BHB stars have been investigated extensively, studies of sdB stars have
Bear, Behr, Behr, Behr, Behr, Berger, Billères, Billères, Blanchette, Brown, Caloi, Carney, Carney, Charpinet, Charpinet, Charpinet, Charpinet, Charpinet, Copperwheat, de Marchi, Deca, Dorman, D’Cruz, Edelmann, Edelmann, Eisenstein, Fabbian, Fontaine, For, Geier, Geier, Geier, Geier, Geier, Geier, Geier, Gourgouliatos, Green, Green, Green, Grundahl, Han, Han, Han, Han, Heber, Heber, Heber, Heber, Hirsch, Iben, Jeffery, Kawaler, Kilkenny, Kilkenny, Kinman, Koen, Lemke, Lisker, Marietta, Maxted, Maxted, Mengel, Michaud, Michaud, Morales-Rueda, Napiwotzki, Napiwotzki, Napiwotzki, Napiwotzki, Napiwotzki, O’Donoghue, Pace, Peterson, Peterson, Peterson, Peterson, Politano, Przybilla, Quievy, Randall, Recio-Blanco, Recio-Blanco, S. Geier, Saffer, Sills, Silvotti, Soker, Ströer, Sweigart, Telting, U. Heber, Unglaub, van Grootel, van Grootel, Vink, Webbink, Østensen, Østensen   +98 more
core   +1 more source

Flow‐Induced Vascular Remodeling on‐Chip: Implications for Anti‐VEGF Therapy

Advanced Functional Materials, EarlyView.
Flow‐induced vascular remodeling plays a critical role in network stabilization and function. Using a vasculature‐on‐chip system, this study reveals how physiological VEGF levels and flow affect vascular remodeling and provides insights into tumor vessel normalization.
Fatemeh Mirzapour‐Shafiyi, Elias Huber, Leonie Karr, Johnny Tong, Andreas Richard Bausch, Friedrich Christian Simmel, Karen Alim   +6 more
wiley   +1 more source

Photometric identification of blue horizontal branch stars

, 2010
We investigate the performance of some common machine learning techniques in identifying BHB stars from photometric data. To train the machine learning algorithms, we use previously published spectroscopic identifications of BHB stars from SDSS data.
Abazajain, Adelman-McCarthy, Bailer-Jones, C. A. L. Bailer-Jones, Cortes, Dorman, Gao, Harris, Hayfield, Huertas-Company, K. W. Smith, Kinman, Marengo, R. J. Klement, Richards, Richards, Schlegel, Sirko, Tsalmantza, Tsalmantza, X. X. Xue, Xue, Xue, Yanny   +23 more
core   +2 more sources

The Variable Stars and Blue Horizontal Branch of the Metal-Rich Globular Cluster NGC 6441 [PDF]

, 1998
We present time-series VI photometry of the metal-rich ([Fe/H] = -0.53) globular cluster NGC 6441. Our color-magnitude diagram shows that the extended blue horizontal branch seen in Hubble Space Telescope data exists in the outermost reaches of the ...
Andrew C. Layden, Bertelli G., Bookmeyer B. B., Buzzoni A., Dean J. F., Douglas L. Welch, Kaluzny J., Laura A. Ritter, Tracy M. A. Webb   +8 more
core   +2 more sources

Perovskite Light‐Emitting Diodes with Quantum Wires and Nanorods

Advanced Materials, EarlyView.
This review focuses on low‐dimensional perovskite materials and discusses their applications in light‐emitting diodes (LEDs). Special attention is given to the introduction of perovskite quantum wires and nanorods, two unique types of one‐dimensional (1D) materials, and their interesting optoelectronic properties.
Qianpeng Zhang, Daquan Zhang, Zebing Liao, Yang Bryan Cao, Mallem Kumar, Swapnadeep Poddar, Junchao Han, Ying Hu, Hualiang Lv, Xiaoliang Mo, Abhishek Kumar Srivastava, Zhiyong Fan   +11 more
wiley   +1 more source

The peculiar Horizontal Branch of NGC 2808

, 2010
We present an accurate analysis of the peculiar Horizontal Branch (HB) of the massive Galactic globular cluster NGC 2808, based on high-resolution far-UV and optical images of the central region of the cluster obtained with HST. We confirm the multimodal
B. Lanzoni, Bailyn, Bedin, Bedin, Bekki, Bertin, Brown, Brown, Buonanno, Buonanno, Busso, Calamida, Cardelli, Carretta, Carretta, Cassisi, Castellani, Castellani, Castellani, Cohen, Corwin, D'Antona, D'Antona, D'Antona, D'Cruz, D'Ercole, Da Costa, Dalessandro, Dalessandro, Decressin, Decressin, Dieball, Dorman, Dotter, Dotter, E. Dalessandro, E. Sabbi, F. Fusi Pecci, F. R. Ferraro, Ferraro, Ferraro, Ferraro, Ferraro, Ferraro, Ferraro, Ferraro, Girardi, Gratton, Gratton, Harris, Harris, Holtzman, Hui-Bon-Hoa, Iannicola, Lanzoni, Lee, M. Salaris, Mackey, Marino, Michaud, Miller Bertolami, Moehler, Moni Bidin, Montegriffo, Pace, Pancino, Pietrinferni, Piotto, Piotto, Quievy, R. T. Rood, Recio-Blanco, Rich, Rood, Rood, Rood, Rutledge, S. Cassisi, Samus, Sollima, Sosin, Ventura, Villanova, Zinn   +83 more
core   +1 more source