%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 }