Results 231 to 240 of about 5,914 (256)

Prevalence of teenage pregnancy and associated factors in Uganda: a meta-analysis and systematic review. [PDF]

BMJ Open
Aremu BA, Afolabi IB, Simeon AN, Mujeeb S.   +3 more
europepmc   +1 more source

A binary merger product as the direct progenitor of a Type II-P supernova

Niu* Z, Sun* N, Zapartas* E, Souropanis D, Cui Y, Maund JR, Andrews JJ, Briel MM, Fraser M, Gossage S, Kruckow MU, Liotine C, Liu Z, Srivas PM, Teng E, Wang X, Yang Y, Liu J.   +17 more
europepmc   +1 more source

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SLoWPoKES: A Catalog of Very Wide, Low-Mass Binary Stars

AIP Conference Proceedings, 2009
We present initial results from the Sloan Low‐mass Wide Pairs of Kinematically Equivalent Stars (SLoWPoKES) survey, an ongoing effort to identify wide (a>100 AU), low‐mass (mid‐K—mid M) binary systems from the Sloan Digital Sky Survey (SDSS) photometric database. Bochanski et al. (2009, in prep.) have compiled a catalog of more than 33 million low‐mass
John Bochanski, Keivan Stassun, Stassun Keivan G   +2 more
exaly   +2 more sources

A pas de trois birth for wide binary stars

Nature, 2012
Keivan Stassun
exaly   +2 more sources

The Frequency of Wide Binaries among the Southern Barium Stars

Astrophysics and Space Science, 1988
All of the barium and marginal barium stars in the 1972 MacConnell, Frey, and Upgren (1972: MFU) list of such objects which are located south of the celestial equator were examined for visual duplicity. Over 200 objects were observed, and a total of six possible candidates for wide pair visual binaries were found. Of these, four are most likely optical
Roger B. Culver, Philip A. Ianna
openaire   +1 more source

Wide Binaries among High-Velocity and Metal-Poor Stars

Astrophysics and Space Science, 1999
The properties of old disk and halo binaries are of interest for the understanding of the processes of formation and early dynamical evolution of the Galaxy. The luminosity function of the components of wide binaries and multiples, their mass function, the fraction of halo or old disk stars that are members of wide binaries, and the distribution of ...
Christine Allen, M. A. Herrera, A. Poveda   +2 more
openaire   +1 more source

Searching for Planets Around Stars in Wide Binaries

2007
We present the status of the radial velocity planet search ongoing at TNG. We are observing about 50 wide binaries with similar components, searching for planets and abundance anomalies caused by the ingestion of metal-rich planetary material. A by-product of our project is the detection of several new spectroscopic binaries.
Silvano Desidera, Raffaele Gratton, Riccardo Claudi, Mauro Barbieri, Giovanni Bonannno, Mariangela Bonavita, Rosario Cosentino, Michael Endl, Sara Lucatello, Aldo F. Martinez Fiorenzano, Francesco Marzari, Salvo Scuderi   +11 more
openaire   +1 more source

The third catalogue of nearby stars with special emphasis on wide binaries

Astrophysics and Space Science, 1988
Thirty-six percent of the 1641 visual components nearer than 22.5 parsecs listed in 1969 were members of systems. Meanwhile for an extension to 25 pc of the Sun about 2000 additional objects are found, however, only 22% of them are known today as members of systems. Angular separations are observed from a few tenths of an arcsec to more than one degree.
W. Gliese, H. Jahreiss
openaire   +2 more sources

On statistical distributions of wide binary stars

2017
The semi-major axis is a key parameter of binary stellar systems. In order to obtain current semi-major axis distribution we investigated a volume-limited sample of the binaries in solar neighbourhood. Obtained distribution shows unsatisfactory agreement with the canonical Opik's law.
Chulkov, D.A., Trushin, D.I.
openaire   +1 more source