Results 91 to 100 of about 1,006,206 (194)
Astronomy & AstrophysicsRR Lyrae stars (RRLs) are classical tracers of old stellar populations, yet growing evidence suggests the presence of a metal-rich ([Fe/H] ≳ −0.5), intermediate-age (2–7 Gyr) sub-population in the Milky Way disc.
Iorio Giuliano +10 more
doaj +1 more source
Signals of the QCD Phase Transition in the Heavens [PDF]
, 2007 The modern phase diagram of strongly interacting matter reveals a rich structure at high-densities due to phase transitions related to the chiral symmetry of quantum chromodynamics (QCD) and the phenomenon of color superconductivity.
Schaffner-Bielich, Jürgen
core
Radial Velocity and Astrometric Evidence for a Close Companion to Betelgeuse
The Astrophysical JournalWe examine a century of radial velocity, visual magnitude, and astrometric observations of the nearest red supergiant, Betelgeuse, in order to reexamine the century-old assertion that Betelgeuse might be a spectroscopic binary.
Morgan MacLeod +12 more
doaj +1 more source
High-priority Compact-object Candidates in Young Clusters from the Gaia DR3 Non-Single-Star Catalog
The Astrophysical Journal LettersThe search for massive compact objects such as black holes (BHs) or neutron stars (NSs) in star clusters is a longstanding challenge in astrophysics, yet no definitive identification of such compact objects in young clusters has been reported.
Dejian Liu +9 more
doaj +1 more source
The Astronomical JournalWe present 1066 speckle measurements of M dwarf multiples observed over 2021–2024, all taken with HRCam on the Southern Astrophysical Research 4.1 m telescope.
Eliot Halley Vrijmoet +5 more
doaj +1 more source
Gaia’s Promise to Detect Compact-object Binaries: Where We Stand with the Third Data Release
The Astrophysical JournalWith its third data release (DR3), Gaia begins unveiling dormant candidate compact object (CO) binaries with luminous companions (LC) as predicted by several past theoretical studies.
Chirag Chawla +2 more
doaj +1 more source
88th Annual Meeting of the Meteoritical Society 2026: Abstracts
Meteoritics &Planetary Science, Volume 61, Issue S1, Page S48-S551, August 2026.
wiley +1 more source
The Initial-to-final Mass Relation of White Dwarfs in Intermediate-separation Binaries
The Astrophysical JournalWe examine the applicability of the initial-to-final mass relation (IFMR) for white dwarfs (WDs) in intermediate-separation binary systems (∼1 au), using astrometric binaries identified in open clusters from Gaia DR3.
Oren Ironi +3 more
doaj +1 more source
Three-dimensional Orbit and Dynamical Masses of GJ 105 AC
The Astrophysical JournalThe precision of stellar models is higher than the precision at which we are able to measure the masses of most stars, with the notable exception of binaries where we can determine dynamical masses of the component stars.
Cayla M. Dedrick +13 more
doaj +1 more source