Results 41 to 50 of about 80,897 (317)

The Census of Exoplanets in Visual Binaries: Population Trends from a Volume-Limited Gaia DR2 and Literature Search

open access: yesFrontiers in Astronomy and Space Sciences, 2021
We present results from an extensive search in the literature and Gaia DR2 for visual co-moving binary companions to stars hosting exoplanets and brown dwarfs within 200 pc.
Clémence Fontanive   +1 more
doaj   +1 more source

The High Angular Resolution Multiplicity of Massive Stars

open access: yes, 2008
We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago.
Alzner   +150 more
core   +1 more source

Dynamical detection of three triple stellar systems in open clusters [PDF]

open access: yes, 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

Multiplicity of late-type B stars with HgMn peculiarity

open access: yes, 2010
Observations at various wavelengths of late B-type stars exhibiting strong overabundances of the chemical elements Hg and Mn in their atmospheres indicate that these stars are frequently found in binary and multiple systems.
Abt   +61 more
core   +1 more source

The triple degenerate star WD1704+481 [PDF]

open access: yes, 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

The New Version of the Binary Star Database (BDB)

open access: yesOpen Astronomy, 2012
The Binary star database contains data on about 100 000 stellar systems of multiplicity 2 to 22, taken from a large variety of published catalogues for all types of binary stars: visual, orbital, astrometric, interferometric, spectroscopic, photometric ...
Kaygorodov P.   +4 more
doaj   +1 more source

The primordial binary population II: Recovering the binary population for intermediate mass stars in Sco OB2

open access: yes, 2007
We characterize the binary population in the young and nearby OB association Scorpius OB2 using available observations of visual, spectroscopic, and astrometric binaries with intermediate-mass primaries.
A. G. A. Brown   +95 more
core   +1 more source

Carina OB Stars: X-ray Signatures of Wind Shocks and Magnetic Fields [PDF]

open access: yes, 2011
The Chandra Carina Complex contains 200 known O- and B type stars. The Chandra survey detected 68 of the 70 O stars and 61 of 127 known B0-B3 stars. We have assembled a publicly available optical/X-ray database to identify OB stars that depart from the ...
Anthony F. J. Moffat   +86 more
core   +4 more sources

Spectroscopic Orbits of Subsystems in Multiple Stars. XI

open access: yesThe Astronomical Journal
Adding to the large radial velocity survey of nearby solar-type stars (summary in Tokovinin, 2023a), spectroscopic orbits are determined for four hierarchical systems: HIP 49442 (inner and outer periods of 164.55 days and 34 yr, respectively), HIP 55691 (
Andrei Tokovinin
doaj   +1 more source

Data‐driven discovery of gene expression markers distinguishing pediatric acute lymphoblastic leukemia subtypes

open access: yesMolecular Oncology, EarlyView.
This study investigates gene expression differences between two major pediatric acute lymphoblastic leukemia (ALL) subtypes, B‐cell precursor ALL, and T‐cell ALL, using a data‐driven approach consisting of biostatistics and machine learning methods. Following analysis of a discovery dataset, we find a set of 14 expression markers differentiating the ...
Mona Nourbakhsh   +8 more
wiley   +1 more source

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