Results 31 to 40 of about 102,804 (316)
Dynamically Forming Extremely Low-mass White Dwarf Binaries in Wide Orbits
The Astrophysical Journal, 2023 The detection of a 0.2 M _⊙ extremely low-mass white dwarf (EW) in a wide orbit ( P _orb ≈ 450 days) with a 1.1 M _⊙ main-sequence companion, KIC 8145411, challenges our current understanding of how EWs form. The traditional channel for EW formation, via
Ambreesh Khurana +2 more
doaj +1 more source
The origin of single radio pulsars
, 1999 By comparing relative rates of supernovae versus formation rates of single radio pulsars, recycled pulsars, binary pulsars and X-ray binaries we put strong limits on the progenitors of radio pulsars and on the requirement of an asymmetry in the supernova.
Heuvel, Edward van den +1 more
core +4 more sources
A Mini Atlas of H-Band Spectra of Southern Symbiotic Stars
Galaxies, 2023 Symbiotic stars are interacting binary systems composed of an evolved star (generally a late-type red giant) and a degenerate or dwarf companion in orbit close enough for mass transfer to occur. Understanding the status of the late-type star is important
Paula Esther Marchiano +6 more
doaj +1 more source
Quantitative spectroscopy of close binary stars [PDF]
, 2011 The method of spectral disentangling has now created the opportunity for studying the chemical composition in previously inaccessible components of binary and multiple stars.
Brogaard +35 more
core +1 more source
Strong Variability in AzV 493, an Extreme Oe-type Star in the SMC
The Astrophysical Journal, 2023 We present 18 yr of OGLE photometry together with spectra obtained over 12 yr revealing that the early Oe star AzV 493 shows strong photometric (Δ I < 1.2 mag) and spectroscopic variability with a dominant, 14.6 yr pattern and ∼40 day oscillations.
M. S. Oey +13 more
doaj +1 more source
Emission-line diagnostics of nearby H ii regions including interacting binary populations [PDF]
, 2018 We present numerical models of the nebular emission from H II regions around young stellar populations over a range of compositions and ages. The synthetic stellar pop- ulations include both single stars and interacting binary stars.
Lin Xiao, E. Stanway, J. J. Eldridge
semanticscholar +1 more source
"Dark Matter" in Accretion Disks [PDF]
, 2008 Using Spitzer Space Telescope photometric observations of the eclipsing, interacting binary WZ Sge, we have discovered that the accretion disk is far more complex than previously believed.
Brinkworth, C. +6 more
core +3 more sources
A dusty pinwheel nebula around the massive star WR 104 [PDF]
, 1999 Wolf-Rayet (WR) stars are luminous massive blue stars thought to be immediate precursors to the supernova terminating their brief lives. The existence of dust shells around such stars has been enigmatic since their discovery some 30 years ago; the ...
AF Moffat +24 more
core +2 more sources
Multiple Tidal Disruptions as an Indicator of Binary Super-Massive Black Hole Systems [PDF]
, 2010 We find that the majority of systems hosting multiple tidal disruptions are likely to contain hard binary SMBH systems, and also show that the rates of these repeated events are high enough to be detected by LSST over its lifetime.
Aller +18 more
core +2 more sources
White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 14 [PDF]
, 2019 White dwarfs carry information on the structure and evolution of the Galaxy, especially through their luminosity function and initial-to-final mass relation. Very cool white dwarfs provide insight into the early ages of each population.
Amaral, Larissa A. +8 more
core +2 more sources