Results 41 to 50 of about 1,189,468 (290)

The Rotational Evolution of Young, Binary M Dwarfs [PDF]

, 2018
We have analysed K2 light curves for more than 3,000 low mass stars in the $\sim$8 Myr old Upper Sco association, the $\sim$125 Myr age Pleiades open cluster and the $\sim$700 Myr old Hyades and Praesepe open clusters to determine stellar rotation rates.
Barrado, David, Bouvier, Jerome, Cody, Ann Marie, David, Trevor, Hillenbrand, Lynne, Pinsonneault, Marc, Rebull, Luisa, Stauffer, John   +7 more
core   +4 more sources

A Search for Exoplanets in Short-Period Binary Star Systems [PDF]

Journal of Astronomy and Space Sciences, 2012
This paper reports the progress of a search for exoplanets with S-type orbits in short-period binary star systems. The selected targets have stellar orbital periods of just a few days. These systems are eclipsing binaries so that exoplanet transits, if
Ronald Kaitchuck, Garrison Turner, Joseph Childers   +2 more
doaj   +1 more source

The Binary Fraction of Stars in Dwarf Galaxies: The Cases of Draco and Ursa Minor [PDF]

Astronomical Journal, 2018
Measuring the frequency of binary stars in dwarf spheroidal galaxies (dSphs) requires data taken over long time intervals. We combine radial velocity measurements from five literature sources taken over the course of ∼30 years to yield the largest multi ...
M. Spencer, M. Mateo, E. Olszewski, M. Walker, A. McConnachie, E. Kirby   +5 more
semanticscholar   +1 more source

Binary stars can provide the `missing photons' needed for reionization [PDF]

, 2016
Empirical constraints on reionization require galactic ionizing photon escape fractions f_(esc) ≳ 20 per cent, but recent high-resolution radiation-hydrodynamic calculations have consistently found much lower values ∼1–5 per cent.
Xiangcheng Ma, P. Hopkins, D. Kasen, E. Quataert, C. Faucher-Giguére, D. Keres̆, Norman Murray Caltech, Uc Berkeley, Lbnl, Northwestern, Ucsd, Cita   +11 more
semanticscholar   +1 more source

Hypervelocity binary stars: smoking gun of massive binary black holes

, 2007
The hypervelocity stars recently found in the Galactic halo are expelled from the Galactic center through interactions between binary stars and the central massive black hole or between single stars and a hypothetical massive binary black hole.
D. N. C. Lin, Diener P., Qingjuan Yu, Richstone D., Youjun Lu   +4 more
core   +1 more source

Binary Interaction Dominates the Evolution of Massive Stars [PDF]

Science, 2012
Star Partners Stars more massive than eight times the mass of the Sun are rare and short-lived, yet they are fundamentally important because they produce all the heavy elements in the universe, such as iron, silicon, and calcium. Sana et al. (p.
H. Sana, S. D. Mink, A. D. Koter, N. Langer, C. Evans, M. Gieles, E. Gosset, R. Izzard, J. L. Bouquin, F. Schneider   +9 more
semanticscholar   +1 more source

Eclipsing binary stars with a δ Scuti component [PDF]

, 2017
Eclipsing binaries with a $\delta$ Sct component are powerful tools to derive the fundamental parameters and probe the internal structure of stars. In this study, spectral analysis of 6 primary $\delta$ Sct components in eclipsing binaries has been ...
F. Aliçavuş, E. Soydugan, B. Smalley, Jiří Kubát   +3 more
semanticscholar   +1 more source

Binary stars in the Galactic thick disc [PDF]

, 2017
The combination of asteroseismologically-measured masses with abundances from detailed analyses of stellar atmospheres challenges our fundamental knowledge of stars and our ability to model them.
R. Izzard, H. Preece, P. Jofré, Ghina M. Halabi, T. Masseron, C. Tout   +5 more
semanticscholar   +1 more source

Coalescing Binary Neutron Stars [PDF]

, 1999
Coalescing compact binaries with neutron star or black hole components provide the most promising sources of gravitational radiation for detection by the LIGO/VIRGO/GEO/TAMA laser interferometers now under construction.
Abramovici M, Akmal A, Anderson A, Andersson N, Arras P, Bailes M, Bailyn C D, Baumgarte T W, Baumgarte T W, Baym G, Blanchet L, Carter B, Chandrasekhar S, Choquet-Bruhat Y, Costa E, Curran S J, Danzmann K, Deich W T S, Eichler D, Evans C R, Flanagan E E, Flanagan E E, Frederic A Rasio, Friedman J L, Friedrich H, Goldstein H, Hough J, Iben I Jr, Janka H-T, Junker W, Kidder L E, Kuroda K, Lai D, Lee W H, Lichnerowicz A, Lipunov V M, Lombardi J C, Lombardi J C, Markovic D, Marronetti P, Marronetti P, Matzner R A, Meegan C A, Mészáros P, Mészáros P, Nakamura T, Owen B, Owen B, Paczynski B, Parashar M, Portegies Zwart S F, Rasio F A, Rosswog S, Rosswog S, Rosswog S, Ruffert M, Ruffert M, Ruffert M, Ruffert M, Ruffert M, Schutz B F, Seidel E, Shapiro S L, Shapiro S L, Shibata M, Shibata M, Shibata M, Shibata M, Smarr L, Soberman G E, Stuart L Shapiro, Swesty F D, Symbalisty E M D, Taniguchi K, Tassoul J-L, Thorne K S, Thorne K S, Thorne K S, Thorsett S E, Tutukov A V, van den Heuvel E P J, van Putten M H P M, Wang E Y M, Wang E Y M, Will C M, Wilson J R, Wiseman A G, Wolszczan A   +87 more
core   +2 more sources

General Relativistic Decompression of Binary Neutron Stars During Dynamic Inspiral

, 2007
We investigate the dynamic stability of inspiraling neutron stars by performing multiple-orbit numerical relativity simulations of the binary neutron star inspiral process.
Miller, Mark
core   +1 more source