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Brown dwarf characterization with EChO
Experimental Astronomy, 2015The Exoplanet Characterization Observatory (EChO) is a space mission concept dedicated to the analysis of exoplanet atmospheres using low-resolution spectroscopy in the infrared region between 0.55 and 11 μm. A fraction of its time will be used for ancillary science. We discuss here the prospect of a small survey of L and T-type brown dwarfs.
Morales, J. C. +4 more
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Annual Review of Astronomy and Astrophysics, 1991
We know a lot about stars and planets. We know about stars because they are easy to detect and because we can observe them in the various stages of their life cycles. We know about planets because we live on a planet, because there are nearby planets that can be visited by spacecraft and observed in detail, and because the known planets and other ...
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We know a lot about stars and planets. We know about stars because they are easy to detect and because we can observe them in the various stages of their life cycles. We know about planets because we live on a planet, because there are nearby planets that can be visited by spacecraft and observed in detail, and because the known planets and other ...
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Nature, 2016
Objects known as brown dwarfs are midway between stars and planets in mass. Observations of a hot brown dwarf irradiated by a nearby star will help to fill a gap in our knowledge of the atmospheres of fluid planetary objects.
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Objects known as brown dwarfs are midway between stars and planets in mass. Observations of a hot brown dwarf irradiated by a nearby star will help to fill a gap in our knowledge of the atmospheres of fluid planetary objects.
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Reviews of Modern Physics, 1993
This review summarizes the current status of both brown dwarf theory and the searches for these elusive substellar objects. The conceptual continuity between the brown dwarf and the well-studied M dwarf branches is emphasized throughout. The physics of their atmospheres and interiors is reviewed and an analytic model of both brown dwarf evolution and ...
James Liebert, Adam Burrows
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This review summarizes the current status of both brown dwarf theory and the searches for these elusive substellar objects. The conceptual continuity between the brown dwarf and the well-studied M dwarf branches is emphasized throughout. The physics of their atmospheres and interiors is reviewed and an analytic model of both brown dwarf evolution and ...
James Liebert, Adam Burrows
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AIP Conference Proceedings, 2009
Observations have shown that continuous radio emission and also sporadic Hα and X‐ray emission are prominent in objects at the substellar limit. These activity signatures are interpreted as being caused by coupling of an ionized atmosphere to the stellar magnetic field.
Felicitas Mokler +3 more
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Observations have shown that continuous radio emission and also sporadic Hα and X‐ray emission are prominent in objects at the substellar limit. These activity signatures are interpreted as being caused by coupling of an ionized atmosphere to the stellar magnetic field.
Felicitas Mokler +3 more
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Science, 1999
In Alexander Hellemans's article “Binaries answer riddle of brown dwarf origins” (News of the Week, 13 Nov. p. [1240][1]), I am quoted as saying that the G 196-3 binary system consisting of an M-type star and a brown dwarf is “too young…for the dwarf to have formed from an accretion disk, like a planet” and that, “[b]ecause the brown dwarf is so far ...
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In Alexander Hellemans's article “Binaries answer riddle of brown dwarf origins” (News of the Week, 13 Nov. p. [1240][1]), I am quoted as saying that the G 196-3 binary system consisting of an M-type star and a brown dwarf is “too young…for the dwarf to have formed from an accretion disk, like a planet” and that, “[b]ecause the brown dwarf is so far ...
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2002
Numerous brown dwarfs have been found in recent years, re-igniting debate about their origin. A natural way to stunt the growth of a nascent stellar embryo is to eject it out of the infalling gas envelope. This can be achieved by dynamical interactions in newborn multiple systems or small-N clusters of stellar embryos.
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Numerous brown dwarfs have been found in recent years, re-igniting debate about their origin. A natural way to stunt the growth of a nascent stellar embryo is to eject it out of the infalling gas envelope. This can be achieved by dynamical interactions in newborn multiple systems or small-N clusters of stellar embryos.
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Science, 2012
Observations reveal the possible formation of a brown dwarf through the collapse of an interstellar cloud fragment.
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Observations reveal the possible formation of a brown dwarf through the collapse of an interstellar cloud fragment.
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2003
Some popular star formation theories envision binary formation as the end product of cloud core fragmentation followed by dynamical evolution within small-N stellar groups. To explore these scenarios, we simulate the dynamical decay of small-N stellar groups by direct orbit integrations and analyze the multiplicity and contents of the stable decay ...
Michael Sterzik, Richard H. Durisen
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Some popular star formation theories envision binary formation as the end product of cloud core fragmentation followed by dynamical evolution within small-N stellar groups. To explore these scenarios, we simulate the dynamical decay of small-N stellar groups by direct orbit integrations and analyze the multiplicity and contents of the stable decay ...
Michael Sterzik, Richard H. Durisen
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