multiple star


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multiple star

A group of two or more stars, such as Epsilon Lyrae, that are held together by their mutual gravitational attraction. Orbital motions within multiple systems are complex. For instance, systems containing two or more close binaries in orbit about each other appear to be quite common. See also binary star.

Multiple Star

 

a system of three to seven stars in close proximity in space, revolving about a common center of mass under the action of gravitational forces. Systems of eight or more stars are generally the nuclei of star clusters. Multiple stars similar to the trapezium of Orion are systems whose components are more or less equidistant from one another. Such multiple stars may be unstable. In some cases, stars located significantly farther from or closer to the system and only projected on it in the sky are ascribed to the multiple system. The components of multiple stars can themselves be close (spectral, eclipsing, or other type) binary stars. In this case, there may prove to be more than seven stars in the system.

multiple star

[′məl·tə·pəl ′stär]
(astronomy)
A system of three or more stars which appear to the naked eye as a single star.
References in periodicals archive ?
j] is a directed multiple star with center [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII].
This multiple star system must have been included in the NGC because of its appearance at low power this group is nebulous.
Sirius is a multiple star system, with at least three components orbiting their common center of gravity.
Master Controller (MCON) collects, processes and manages raw RFID data from multiple STAR systems supporting the EPCglobal Standard Application Layer Events (ALE) interface to seamlessly integrate with the industry's leading ERP systems, and can now run virtually with VMware for datacenter or RFID applications requiring a "cloud-hosted" solution managing the supply chain from source to destination.
Astrophysicist Thomas Tauris from the Max Planck Institute for Radio Astronomy and the Argelander Institute for Astronomy in Bonn jointly with Ed van den Heuvel through theoretical calculations and stability analysis on the base of stellar evolution, demonstrated a plausible theoretical model which brings new insight to knowledge of stellar interactions in multiple star systems.
Our new findings, combined with the earlier data, make disk fragmentation the strongest explanation for how close multiple star systems are formed," said Leslie Looney of NRAO and the University of Illinois.
0) Red Rectangle Reflecting 06h 19m 8 -10[degrees]38 HD 44179 Nebula NGC 2237/8/9 Emission Nebula 06 32 3 +05 03 NGC 2244 Open Cluster 06 32 3 +04 51 NGC2251 Open Cluster 06 34 7 +08 23 NGC 2252 Open Cluster 06 35 0 +05 23 NGC 2261 Reflecting Neb 06 39 2 +08 44 NGC 2264 Emission Nebula/ 06 41 1 +09 53 Open Cluster NGC 2323 Open Cluster 07 03 2 -08 20 NGC 2346 Planetary Nebula 07 09 2 -00 48 COCD 1034 Multiple Star group 07 10 5 +06 04 NGC 2353 Open Cluster 07 14 6 -10 18 Moni 5 Asterism 07 18 4 +06 18 Streicher 20 Asterism 07 43 7 +04 50 NGC 2538 Galaxy 08 11 4 +03 37 Object Mag.
At the center of the nebula is the multiple star theta Orionis, more commonly known as the Trapezium--a real gem, buried in nebulosity.
The unusual open cluster NGC 2017, which would be better referred to as an asterism, or a multiple star group, is situated just 1.
All of us at Hennessy Funds feel honored to once again receive multiple STAR Awards from such a well-respected industry association," said Neil Hennessy, President and CIO of Hennessy Funds.
The finding is at odds with a survey completed in 1991, which found that the majority of systems containing a sun-like star were multiple star systems, reports New Scientist.
The well-known Trapezium multiple star at the heart of M42 is a group of massive, hot, O-type stars.

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