Results 41 to 50 of about 326,902 (179)
Dynamical detection of three triple stellar systems in open clusters [PDF]
, 2014 We present a kinematic analysis of three triple stellar systems belonging to two open clusters: CPD-60{\deg}961 and HD66137 in NGC2516, and HD315031 in NGC6530.
Cowley, C. R. +2 more
core +3 more sources
Symbiotic Stars in OGLE Data I. Large Magellanic Cloud Systems [PDF]
, 2013 Symbiotic stars are long-orbital-period interacting-binaries characterized by extended emission over the whole electromagnetic range and by complex photometric and spectroscopic variability.
Angeloni, R. +12 more
core +3 more sources
Don’t Believe the Hype(r): The Yellow Supergiants of Westerlund 1
The Astrophysical Journal, 2023 Yellow hypergiants (YHGs) are often presumed to represent a transitional post-red supergiant (RSG) phase for stars ∼30–40 M _⊙ . Here we present visual-wavelength echelle spectra of six YHG candidates in the Galactic cluster Westerlund 1, and we compare ...
Emma R. Beasor +2 more
doaj +1 more source
The triple degenerate star WD1704+481 [PDF]
, 2000 WD1704+481 is a visual binary in which both components are white dwarfs. We present spectra of the H-alpha line of both stars which show that one component (WD1704+481.2 = Sanduleak B = GR 577) is a close binary with two white dwarf components.
Han, Z. +3 more
core +4 more sources
Cas A and the Crab Were Not Stellar Binaries At Death [PDF]
, 2017 The majority of massive stars are in binaries, which implies that many core collapse supernovae (ccSNe) should be binaries at the time of the explosion. Here we show that the three most recent, local (visual) SNe (the Crab, CasA and SN1987A) were not binaries, with limits on the initial mass ratios of q=M2/M1<0.1. No quantitative limits have previously
arxiv +1 more source
Visual Orbits & Alignments of Planet Hosting Binary Systems [PDF]
arXiv, 2023 Roughly half of Solar-type planet hosts have stellar companions, so understanding how these binary companions affect the formation and evolution of planets is an important component to understanding planetary systems overall. Measuring the dynamical properties of planet host binaries enables a valuable test of planet formation in multi-star systems and
arxiv
PROCESSING OF SIMULATED AND EXPERIMENTAL IMAGES OF CLOSELY SPACED BINARY STARS USING SPECKLE INTERFEROMETRY [PDF]
, 2016 Theory and methods of processing speckle interferometry data from close visual binary stars are presented and implemented. The effects of the optical systems used for observing close visual binary stars are explained and simulated from both the ...
Smidth, Niels
core +1 more source
The Astronomical JournalJoint analysis of position measurements and radial velocities of six triple stellar systems is conducted to determine their inner and/or outer orbits. Accumulation of such data is needed to study the architecture of stellar hierarchies and its relation ...
Andrei Tokovinin
doaj +1 more source
The Astronomical JournalHere we present speckle observations of 16 low-separation ( s < 30 au) high-probability candidate binaries from the catalog by Medan et al., where secondaries typically lack astrometric solutions in Gaia. From these speckle observations, we find a second
Ilija Medan +3 more
doaj +1 more source
Performance of the SOAR Speckle Instrument
The Astronomical JournalThe High Resolution Camera (HRCam) speckle imager at the 4.1 m Southern Astrophysical Research telescope is a highly productive instrument that has accumulated about 40K observations to date.
Andrei Tokovinin
doaj +1 more source