substellar object

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substellar object

[‚səb‚stel·ər ′äb‚jekt]
(astronomy)
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In dramatic contrast, the brown dwarf of the J1433 system was born a true, full-fledged, nuclear-fusing star, but has been stripped down to its current puny, substellar mass as the result of billions of years of cannibalism on the part of its companion white dwarf.
SEEDS has also reported the detection of three brown dwarfs in the Pleiades cluster as part of the OC category survey (31) and several stellar or substellar companions around planetary systems, from the RV detection.
Remarkably, the high-energy pulsar wind seems to be heating and expanding this companion, driving matter off its surface and whittling it down to a substellar mass (S&T: July 1995, page 13).
The findings come from observations using the Subaru Telescope in Hawaii and the Very Large Telescope (VLT) in Chile during the Substellar Objects in Nearby Young Clusters (SONYC) survey.
The star is either pulling material from a nearby giant planet or substellar companion that maybe still exists or is already completely destroyed, or that a massive gas-rich planet in the stellar system was involved in a deathly collision in the relatively recent past.
The second study revealed that WISE had spotted a veritable treasure trove of new celestial objects, consisting of a host of sparkling stars and relatively cool substellar objects called brown dwarfs, which are "failed stars.
Eventually, these discs become unstable and fragment to form low-mass stars and substellar objects, like brown dwarfs and planets," he added.
The substellar object orbits a white dwarf every two hours at a distance of only 450,000 kilometers (280,000 miles)--one-third the Sun's diameter.
Black says he's reluctant to call the object a planet, because this substellar mass and its environment would bear little, if any, resemblance to known planets.
3847/2041-8213/aa7200/meta) Astrophysical Journal Letters , this is the "first new substellar object" people have identified through the project.
Another brown-dwarf duo is shedding light on the atmospheres of these substellar objects.
Becklin of the University of Hawaii's Institute for Astronomy in Honolulu, "there is at the moment not a single confirmed example of an extra-solar object, either isolated or in orbit around a star, that is unambiguously substellar.