Results 151 to 160 of about 112,298 (365)

The Theory of Pressure Ionization and the Constitution of the White Dwarf Stars [PDF]

, 1939
F. C. Auluck, E. A. Milne
openalex   +1 more source

Edmund Stoner and white dwarf stars [PDF]

Philosophical Magazine, 2011
The discovery of a limiting mass for white dwarf stars is today usually attributed to Subramanian Chandrasekhar. However it appears that an article by Edmund Stoner, which appeared in the Philosophical Magazine in 1930, was the first publication to give a convincing demonstration of the existence of a limiting mass for white dwarfs. We examine here why
openaire   +3 more sources

Know Your Neighborhood: A Detailed Model Atmosphere Analysis of Nearby White Dwarfs

, 2012
We present improved atmospheric parameters of nearby white dwarfs lying within 20 pc of the Sun. The aim of the current study is to obtain the best statistical model of the least-biased sample of the white dwarf population.
Bergeron, Bergeron, Bergeron, Bergeron, Bessell, Bohlin, Cohen, Dufour, Dufour, Dufour, Falcon, Farihi, Farihi, Gatewood, Gianninas, Gianninas, Gianninas, Harris, Holberg, Holberg, Holberg, Holberg, Kawka, Kawka, Kilic, Kilic, Kilic, Kowalski, Leggett, Liebert, Liebert, Limoges, Lépine, Lépine, Lépine, Malo, McCook, Monet, N. Giammichele, P. Bergeron, P. Dufour, Perryman, Press, Provencal, Putney, Reimers, Salim, Schmidt, Scholz, Sion, Subasavage, Subasavage, Subasavage, Tremblay, Tremblay, Tremblay, Tremblay, van Altena, Vennes, Vennes, Vornanen, Zuckerman, Zuckerman   +62 more
core   +1 more source

How many trees are there in the North American boreal forest?

Ecography, EarlyView.
Boreal forests, the largest terrestrial biome on Earth, are highly varied in local tree density. Despite previous attempts to estimate tree density in boreal forests, the accuracy of the estimation is unknown, leaving the question how many trees there are in boreal forests largely unanswered. Here, we compiled tree density data from 4367 plots in North
Kun Xu, Jingye Li, Jian Zhang, Dingliang Xing, Fangliang He   +4 more
wiley   +1 more source

Helium-rich EHB Stars in Globular Clusters

, 2003
Recent UV observations of the most massive Galactic globular clusters show a significant population of hot stars below the zero-age HB (``blue hook'' stars), which cannot be explained by canonical stellar evolution.
Dreizler, S., Landsman, W. B., Moehler, S., Sweigart, A. V.   +3 more
core   +1 more source

Hydrovoltaic Energy Harvesting From Nut Shells

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Schematic diagram illustrating the process of an NS‐based WEG. The flow diagram illustrates the preparations, porous hierarchical structure, water‐surface interactions, water transportation through channels and generating streaming potential. The center left demonstrates voltage/current generation through evaporation in graphite‐NS‐graphite sandwich ...
Nazmul Hossain, Roozbeh Abbasi, Weinan Zhao, Xiaoye Zhao, Aiping Yu, Norman Zhou   +5 more
wiley   +1 more source

SN 2022oqm: A Bright and Multipeaked Calcium-rich Transient

The Astrophysical Journal
We present the photometric and spectroscopic evolution of SN 2022oqm, a nearby multipeaked hydrogen- and helium-weak calcium-rich transient (CaRT). SN 2022oqm was detected 13.1 kpc from its host galaxy, the face-on spiral galaxy NGC 5875.
S. Karthik Yadavalli, V. Ashley Villar, Luca Izzo, Yossef Zenati, Ryan J. Foley, J. Craig Wheeler, Charlotte R. Angus, Dominik Bánhidi, Katie Auchettl, Barna Imre Bíró, Attila Bódi, Zsófia Bodola, Thomas de Boer, Kenneth C. Chambers, Ryan Chornock, David A. Coulter, István Csányi, Borbála Cseh, Srujan Dandu, Kyle W. Davis, Connor Braden Dickinson, Diego Farias, Joseph Farah, Christa Gall, Hua Gao, D. Andrew Howell, Wynn V. Jacobson-Galan, Nandita Khetan, Charles D. Kilpatrick, Réka Könyves-Tóth, Levente Kriskovics, Natalie LeBaron, Kayla Loertscher, X. K. Le Saux, Raffaella Margutti, Eugene A. Magnier, Curtis McCully, Peter McGill, Hao-Yu Miao, Megan Newsome, Estefania Padilla Gonzalez, András Pál, Boróka H. Pál, Yen-Chen Pan, Collin A. Politsch, Conor L. Ransome, Enrico Ramirez-Ruiz, Armin Rest, Sofia Rest, Olivia Robinson, Huei Sears, Jackson Scheer, Ádám Sódor, Jonathan Swift, Péter Székely, Róbert Szakáts, Tamás Szalai, Kirsty Taggart, Giacomo Terreran, Padma Venkatraman, József Vinkó, Grace Yang, Henry Zhou   +62 more
doaj   +1 more source

Laboratory Hydrogen-Beta Emission Spectroscopy for Analysis of Astrophysical White Dwarf Spectra

Atoms, 2018
This work communicates a review on Balmer series hydrogen beta line measurements and applications for analysis of white dwarf stars. Laser-induced plasma investigations explore electron density and temperature ranges comparable to white dwarf star ...
Christian G. Parigger, Kyle A. Drake, Christopher M. Helstern, Ghaneshwar Gautam   +3 more
doaj   +1 more source

Cooling curves and chemical evolution curves of convective mixing white dwarf stars

, 2011
We present theoretical analysis on old white dwarf stars with intermediate amount of hydrogen. The evolution of such objects is complicated by convective mixing from surface convection zone to the underlying helium layer.
E. Chen, B. Hansen
semanticscholar   +1 more source

Asteroseismology of white dwarf stars

, 2014
Most of low- and intermediate-mass stars that populate the Universe will end their lives as white dwarf stars. These ancient stellar remnants have encrypted inside a precious record of the evolutionary history of the progenitor stars, providing a wealth of information about the evolution of stars, star formation, and the age of a variety of stellar ...
openaire   +2 more sources