Results 61 to 70 of about 1,398,922 (322)

Two-dimensional simulations of mixing in classical novae: The effect of white dwarf composition and mass [PDF]

Astronomy & Astrophysics, 2018
Context. Classical novae are explosive phenomena that take place in stellar binary systems. They are powered by mass transfer from a low-mass main sequence star onto either a CO or ONe white dwarf.
J. Casanova, J. José, S. Shore
semanticscholar   +1 more source

The UBV Color Evolution of Classical Novae. III. Time-stretched Color–Magnitude Diagram of Novae in Outburst [PDF]

Astrophysical Journal Supplement Series, 2019
We propose a modified color–magnitude diagram for novae in outburst, i.e., (B − V)0 versus (MV − 2.5 log fs), where fs is the time-scaling factor of a (target) nova against a comparison (template) nova, (B − V)0 is the intrinsic B − V color, and MV is ...
I. Hachisu, M. Kato
semanticscholar   +1 more source

Germanane Quantum Dots Promote Metabolic Reprogramming of Immune Cells Toward Regulatory T Cells and Suppress Inflammation In Vitro and In Vivo

Advanced Functional Materials, EarlyView.
Metabolic changes in immune cells direct the phenotype and function of the host immune system. Smart nanomaterials must target metabolic pathways to direct immune cell fate. This study reports the fabrication and first application of germanane quantum dots (GeHQDs) to modulate inflammation in vitro and in vivo.
Abhay Srivastava, Alireza Rafieerad, Weiang Yan, Keshav Narayan Alagarsamy, Qingdong Guan, Leena Regi Saleth, Michel Aliani, Sanjiv Dhingra   +7 more
wiley   +1 more source

Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum Phase

The Astronomical Journal
Moderate-resolution spectra ( R ≈ 2700) of the classical nova V1391 Cas were obtained in the near-infrared wavelength range of 0.95–2.45 μ m on UT 2020 August 14.41 using the Keck II telescope and the NIRES spectrograph.
Hideyo Kawakita, James E. Lyke
doaj   +1 more source

Time-Dependent Dust Formation in Novae [PDF]

Journal of Astronomy and Space Sciences, 1991
The dust formation processes in novae are investigated with close attention to recent infrared observations. Using mainly the classical nucleation theory, we have calculated the time scales of dust formation and growth in the environments of novae. Those
Kyung-Won Suh
doaj  

The Reanalysis of the ROSAT Data of GQ Mus (1983) Using White Dwarf Atmosphere Emission Models [PDF]

, 2001
The analyses of X-ray emission from classical novae during the outburst stage have shown that the soft X-ray emission below 1 keV, which is thought to originate from the photosphere of the white dwarf, is inconsistent with the simple blackbody model of ...
Balman, Balman, Cropper, Diaz, Diaz, Diaz, Glasner, Gänsicke, Hamada, Hartmann, Hassall, Heise, Iben, J. Krautter, Kahabka, Kahabka, Kato, Kovetz, Krautter, Krautter, Krautter, Livio, Livio, Lloyd, MacDonald, MacDonald, MacDonald, MacDonald, Morisset, Morisset, O'Brien, Orio, Orio, Pfeffermann, Prialnik, Prialnik, Raymond, Saizar, Shanley, Shara, Starrfield, Starrfield, Starrfield, Starrfield, Starrfield, Starrfield, Truran, Tuchman, Voges, Ögelman, Ögelman, Ögelman, Ş. Balman   +52 more
core   +2 more sources

Bio‐Inspired Nanoarchitected LiFePO4 Cathodes

Advanced Functional Materials, EarlyView.
Lithium iron phosphate (LFP) is synthesized using a bio‐inspired method, using acidic macromolecules similar to those found in many calcareous mineralized organisms to modulate the morphology and crystal growth of LFP‐carbon composite particles. The observations from this process indicate a non‐classical crystallization process, which subsequently ...
Parawee Pumwongpitak, Ibrahim El‐Halees, Martyn Kim, Andrew Sanchez, Zachery Robinson, Taifeng Wang, Krassimir Bozhilov, Siriporn Larpkiattaworn, David Kisailus   +8 more
wiley   +1 more source

On the Light Curves of Disk and Bulge Novae

The Astrophysical Journal
We examine the light curves of a sample of novae, classifying them into single-peaked and multiple-peaked morphologies. Using accurate distances from Gaia, we determine the spatial distribution of these novae by computing their heights, Z , above the ...
Asaf Cohen, Dafne Guetta, Yael Hillman, Massimo Della Valle, Luca Izzo, Volker Perdelwitz, Mario Livio   +6 more
doaj   +1 more source

TGRS Observations of Positron Annihilation in Classical Novae [PDF]

, 2000
The TGRS experiment on board the Wind spacecraft has many advantages as a sky monitor --- broad field of view (~2 pi) centered on the south ecliptic pole), long life (1994-present), and stable low background and continuous coverage due to Wind's high ...
Cline, T. L., Gehrels, N., Harris, M. J., Naya, J. E., Palmer, D. M., Ramaty, R., Seifert, H., Teegarden, B. J.   +7 more
core   +3 more sources

Multifrequency behavior of classical novae [PDF]

Proceedings of The Golden Age of Cataclysmic Variables and Related Objects IV — PoS(GOLDEN 2017), 2018
We review our current understanding of multiwavelength light curves of classical and recurrent novae and show how to determine the WD masses and other binary properties. We pick up PW Vul, U Sco, V745 Sco, RS Oph, and V407 Cyg as representatives of different types of light curves, examine their light curves in detail, discuss physical properties, and ...
Izumi Hachisu, Mariko Kato
openaire   +1 more source