The Ultra Cool Brown Dwarf Companion of WD 0806-661: Age, Mass, and
Formation Mechanism
D. Rodriguez, B. Zuckerman, C. Melis, and I. Song. (2011)cite arxiv:1103.3544Comment: 13 pages, 3 figures, accepted in ApJ Letters. Several changes, most importantly a change in the name of the companion (GJ 3483B).
Abstract
We have combined multi-epoch images from the Infrared Side Port Imager on the
CTIO 4-meter telescope to derive a 3-sigma limit of J=21.7 for the ultra cool
brown dwarf companion to WD 0806-661 (GJ 3483). We find that J-4.5>4.95,
redder than any other brown dwarf known to date. With theoretical evolutionary
models and ages 1.5-2.7 Gyr, we estimate the brown dwarf companion to have mass
<10-13 Jupiter masses and temperature <400 K, providing evidence that this is
among the coolest brown dwarfs currently known. The range of masses for this
object is consistent with that anticipated from Jeans-mass fragmentation and we
present this as the likely formation mechanism. However, we find that
substellar companions of similar mass (~7-17 Jupiter masses) are distributed
over a wide range of semi-major axes, which suggests that giant planet and
low-mass brown dwarf formation overlap in this mass range.
Description
[1103.3544] The Ultra Cool Brown Dwarf Companion of WD 0806-661: Age, Mass, and Formation Mechanism
cite arxiv:1103.3544Comment: 13 pages, 3 figures, accepted in ApJ Letters. Several changes, most importantly a change in the name of the companion (GJ 3483B)
%0 Generic
%1 rodriguez2011ultra
%A Rodriguez, David R.
%A Zuckerman, Ben
%A Melis, Carl
%A Song, Inseok
%D 2011
%K 2011 a:Rodriguez a:Zuckerman brown-dwarfs cool formation
%T The Ultra Cool Brown Dwarf Companion of WD 0806-661: Age, Mass, and
Formation Mechanism
%U http://arxiv.org/abs/1103.3544
%X We have combined multi-epoch images from the Infrared Side Port Imager on the
CTIO 4-meter telescope to derive a 3-sigma limit of J=21.7 for the ultra cool
brown dwarf companion to WD 0806-661 (GJ 3483). We find that J-4.5>4.95,
redder than any other brown dwarf known to date. With theoretical evolutionary
models and ages 1.5-2.7 Gyr, we estimate the brown dwarf companion to have mass
<10-13 Jupiter masses and temperature <400 K, providing evidence that this is
among the coolest brown dwarfs currently known. The range of masses for this
object is consistent with that anticipated from Jeans-mass fragmentation and we
present this as the likely formation mechanism. However, we find that
substellar companions of similar mass (~7-17 Jupiter masses) are distributed
over a wide range of semi-major axes, which suggests that giant planet and
low-mass brown dwarf formation overlap in this mass range.
@misc{rodriguez2011ultra,
abstract = {We have combined multi-epoch images from the Infrared Side Port Imager on the
CTIO 4-meter telescope to derive a 3-sigma limit of J=21.7 for the ultra cool
brown dwarf companion to WD 0806-661 (GJ 3483). We find that J-[4.5]>4.95,
redder than any other brown dwarf known to date. With theoretical evolutionary
models and ages 1.5-2.7 Gyr, we estimate the brown dwarf companion to have mass
<10-13 Jupiter masses and temperature <400 K, providing evidence that this is
among the coolest brown dwarfs currently known. The range of masses for this
object is consistent with that anticipated from Jeans-mass fragmentation and we
present this as the likely formation mechanism. However, we find that
substellar companions of similar mass (~7-17 Jupiter masses) are distributed
over a wide range of semi-major axes, which suggests that giant planet and
low-mass brown dwarf formation overlap in this mass range.},
added-at = {2014-08-05T16:35:18.000+0200},
author = {Rodriguez, David R. and Zuckerman, Ben and Melis, Carl and Song, Inseok},
biburl = {https://www.bibsonomy.org/bibtex/21e0e9ec31b4d437dfa27587bc5e0fd17/danielcarrera},
description = {[1103.3544] The Ultra Cool Brown Dwarf Companion of WD 0806-661: Age, Mass, and Formation Mechanism},
interhash = {a2d89a3ef3eadd771d05b59583c2d198},
intrahash = {1e0e9ec31b4d437dfa27587bc5e0fd17},
keywords = {2011 a:Rodriguez a:Zuckerman brown-dwarfs cool formation},
note = {cite arxiv:1103.3544Comment: 13 pages, 3 figures, accepted in ApJ Letters. Several changes, most importantly a change in the name of the companion (GJ 3483B)},
timestamp = {2014-08-05T16:35:18.000+0200},
title = {The Ultra Cool Brown Dwarf Companion of WD 0806-661: Age, Mass, and
Formation Mechanism},
url = {http://arxiv.org/abs/1103.3544},
year = 2011
}