Results 61 to 70 of about 94,613 (301)

Hot DAVs : a probable new class of pulsating white dwarf stars [PDF]

, 2013
We have discovered a pulsating DA white dwarf at the lower end of the temperature range 45 000–30 000 K where a few helium atmosphere white dwarfs are known. There are now three such pulsators known, suggesting that a new class of theoretically predicted
B. T. Gänsicke, Brinkworth, C. M. Copperwheat, Costa, D. W. Kurtz, Dhillon, Dufour, Dufour, Dufour, Eisenstein, Eisenstein, Finley, Fontaine, Fontaine, Fontaine, H. Shibahashi, Homeier, Horne, Hügelmeyer, Kawaler, Kleinman, Kleinman, Kurtz, Lanz, Lehner, Liebert, Marsh, Montgomery, Napiwotzki, Nitta, Provencal, Robinson, S. G. Parsons, S. P. Littlefair, Shibahashi, Shibahashi, T. R. Marsh, V. S. Dhillon, Vennes, Vuille, Wickramasinghe, Winget, Winget   +42 more
core   +2 more sources

Single‐Cell Metabolic Imaging and Digital Scoring of Fat Tissue Remodeling by Label‐Free Metabolic Microscopy

Advanced Science, EarlyView.
Mid‐infrared optoacoustic microscopy (MiROM) acquires lipid‐ and protein‐ associated vibrational contrast in intact fat tissue without dyes, preserving native tissue architecture. Through lateral and axial segmentation, MiROM tracks intrinsic intracellular changes during postnatal remodeling. A quantitative spatial analysis tool (Q‐SAT) maps white‐ and
Myeongseop Kim, Constantin Berger, Alexander Wolf, Alina Peteranderl, Martin Klingenspor, Vasilis Ntziachristos, Yongguo Li, Miguel A. Pleitez   +7 more
wiley   +1 more source

EDGE-INFERNO: Simulating Every Observable Star in Faint Dwarf Galaxies and Their Consequences for Resolved-star Photometric Surveys

The Astrophysical Journal
Interpretation of data from faint dwarf galaxies is made challenging by observations limited to only the brightest stars. We present a major improvement to tackle this challenge by undertaking zoomed cosmological simulations that resolve the evolution of
Eric P. Andersson, Martin P. Rey, Andrew Pontzen, Corentin Cadiou, Oscar Agertz, Justin I. Read, Nicolas F. Martin   +6 more
doaj   +1 more source

Synthetic activity indicators for M-type dwarf stars [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractHere, we present a set of time-dependent 3D RMHD simulations of a M-dwarf star representative of AD Leo, which extend from the upper convection zone into the chromosphere. The 3D model atmospheres are characterized by a very dynamic and intermittent structure on small spatial and temporal scales and a wealth of physical processes, which by ...
Wedemeyer, Sven, Ludwig, Hans-Günter
openaire   +2 more sources

Dynamical population synthesis: Constructing the stellar single and binary contents of galactic field populations

, 2011
[abridged] The galactic field's late-type stellar single and binary population is calculated on the supposition that all stars form as binaries in embedded star clusters.
Bate, Bergfors, Binney, Boissier, Bressert, Calura, Calzetti, Carney, Connelley, de la Fuente Marcos, Delfosse, Diehl, Duchêne, Duchêne, Duquennoy, Fan, Fan, Fischer, Fisher, Fregeau, Ghez, Gieles, Goodwin, Goodwin, Grebel, Harris, Kohler, Kouwenhoven, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Köppen, Lada, Lada, Lada, Lada, Larsen, Larsen, Lee, Lee, Marks, Mayor, Michael Marks, Misiriotis, Moeckel, Muench, Murray, Naab, Oh, Parker, Pavel Kroupa, Peretto, Pflamm-Altenburg, Pflamm-Altenburg, Pflamm-Altenburg, Piskunov, Raghavan, Recchi, Reid, Robitaille, Scheepmaker, Schönrich, Simon, Smith, Teixeira, Walsh, Weidner, Weidner, Zepf   +74 more
core   +1 more source

The Chemical Signature of a Relic Star Cluster in the Sextans Dwarf Spheroidal Galaxy - Implications for Near-Field Cosmology [PDF]

, 2012
We present tentative evidence for the existence of a dissolved star cluster at [Fe/H]=-2.7 in the Sextans dwarf spheroidal galaxy. We use the technique of chemical tagging to identify stars that are highly clustered in a multi-dimensional chemical ...
Bland-Hawthorn, Joss, Freeman, Ken, Karlsson, Torgny, Silk, Joe   +3 more
core   +2 more sources

Spatial‐Wavelength Multiplexing Error‐Controlled Photonic Analog Computing System

Advanced Science, EarlyView.
A novel photonic integrated circuit prototype implementing the concept of general‐purpose analog computing and demonstrate its capability in radio frequency applications. The chip features a multichannel architecture and performs fully optical analog computation with frequency‐domain parallel processing. An FPGA‐based error‐correction algorithm aims to
Tao Zhu, Bowen Zhu, Shicheng Zhang, Keren Li, Xianchen Wu, Yazhi Pi, Jie Yan, Daigao Chen, Bingli Guo, Xi Xiao, Lei Wang, Xiaochuan Xu, Xuwei Xue, Shanguo Huang, Zizheng Cao, Shaohua Yu   +15 more
wiley   +1 more source

The Importance of the Upper Atmosphere to CO/O2 Runaway on Habitable Planets Orbiting Low-mass Stars

The Astrophysical Journal Letters, 2023
Efforts to spectrally characterize the atmospheric compositions of temperate terrestrial exoplanets orbiting M dwarf stars with JWST are now underway.
Sukrit Ranjan, Edward W. Schwieterman, Michaela Leung, Chester E. Harman, Renyu Hu   +4 more
doaj   +1 more source

Search for brown-dwarf companions of stars [PDF]

, 2010
The discovery of 9 new brown-dwarf candidates orbiting stars in the CORALIE and HARPS radial-velocity surveys is reported. New CORALIE radial velocities yielding accurate orbits of 6 previously-known hosts of potential brown-dwarf companions are ...
Baranne, Bean, Benedict, Bouchy, Bouchy, Burrows, Butler, Casertano, Chabrier, Correia, D. Naef, D. Queloz, D. Ségransan, da Silva, Deleuil, Delfosse, Duquennoy, Endl, F. Pepe, Fischer, Forveille, Galland, Girardi, Goldin, Grether, Halbwachs, Halbwachs, Han, Hatzes, Hummel, J. Sahlmann, Jenkins, Konacki, Lane, Liu, Luhman, M. Marmier, M. Mayor, Marcy, Marcy, Martioli, Mayor, Mayor, Mayor, Minniti, Moutou, Muterspaugh, N. C. Santos, Naef, Naef, Nidever, Omiya, Patel, Pepe, Perrier, Perryman, Perryman, Pourbaix, Pourbaix, Pourbaix, Pourbaix, Queloz, Reffert, S. Udry, S. Zucker, Santos, Santos, Santos, Santos, Santos, Santos, Sousa, Sozzetti, Ségransan, Tamuz, Tinney, Tokovinin, Torres, Udry, Udry, Udry, van Leeuwen, Wittenmyer, Wright, Zucker, Zucker   +85 more
core   +1 more source

Ecological Adaptation Mechanisms Underlying Successful Plant Reproduction

Advanced Science, EarlyView.
During floral induction, various environmental and endogenous signals converge to regulate the florigen protein, which is transported from leaves to the SAM to initiate flowering. Within the SAM, a complex network of receptor kinases and small peptides orchestrates floral development with high spatiotemporal precision.
Hang Zhao, Shenghui Huo, Yue Xing, Shuxin Zhang, Guilin Li, Yihui Liu, Chongyang Jin, Fuguang Li, Xiaoyang Ge   +8 more
wiley   +1 more source