Results 51 to 60 of about 330,941 (300)
Visual Binaries: Cross-Matching and Compiling of a Comprehensive List
Open Astronomy, 2015 Visual binary stars make up the largest set among observed types of binaries (currently more than 110 000 systems are known containing more than 230 000 components).
Isaeva A. A. +2 more
doaj +1 more source
Carina OB Stars: X-ray Signatures of Wind Shocks and Magnetic Fields [PDF]
, 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
On the Component Masses of Visual Binaries [PDF]
Serbian Astronomical Journal, 2010 In the Sixth Catalog of Orbits of Visual Binary Stars we found those belonging to the Main Sequence to form a sample containing 432 visual binaries. Their total masses were obtained dynamically, i.e.
Ninkovic, S., Cvetkovic, Z.
doaj +3 more sources
The New Version of the Binary Star Database (BDB)
Open 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
A Multiwavelength Classification and Study of Red Supergiant Candidates in NGC 6946
The Astrophysical Journal, 2023 We have combined resolved stellar photometry from Hubble Space Telescope (HST), Spitzer, and Gaia to identify red supergiant (RSG) candidates in NGC 6946, based on their colors, proper motions, visual morphologies, and spectral energy distributions.
Jared R. Johnson +5 more
doaj +1 more source
Search for DA White Dwarf Binary Candidates from LAMOST DR7
Universe, 2023 We obtained spectroscopy data for 761 Degenerate A (DA)white dwarfs (WDs) with multiple LAMOST observations. The radial velocity (RV) of each spectrum was calculated using the cross-correlation function method (CCF), and 60 DA WD binary candidates were ...
Hua-Hui Yan +6 more
doaj +1 more source
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
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
Molecular Oncology, EarlyView.Large multidimensional digital images of cancer tissue are becoming prolific, but many challenges exist to automatically extract relevant information from them using computational tools. We describe publicly available resources that have been developed jointly by expert and non‐expert computational biologists working together during a virtual hackathon
Sandhya Prabhakaran +16 more
wiley +1 more source
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