Hubble Space Telescope astrometry of the closest brown dwarf binary system - I. Overview and improved orbit

@article{Bedin2017HubbleST,
  title={Hubble Space Telescope astrometry of the closest brown dwarf binary system - I. Overview and improved orbit},
  author={Luigi R. Bedin and Dimitri Pourbaix and D{\'a}niel Apai and Adam J. Burgasser and Esther Buenzli and Henri M. J. Boffin and M. Libralato INAF-OAPD and IAA-ULB Bruxelles and U. Arizona Tucson and Lunar and AZ PlanetaryLaboratory and Ucsd and IfA Eth Zurich and Eso - Garching and Stsci and Uni.PD},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2017},
  volume={470},
  pages={1140-1155}
}
  • L. Bedin, D. Pourbaix, Uni.PD
  • Published 1 June 2017
  • Physics, Geology
  • Monthly Notices of the Royal Astronomical Society
Located at ~2pc, the L7.5+T0.5 dwarfs system WISE J104915.57-531906.1 (Luhman16AB) is the third closest system known to Earth, making it a key benchmark for detailed investigation of brown dwarf atmospheric properties, thermal evolution, multiplicity, and planet-hosting frequency. In the first study of this series -- based on a multi-cycle Hubble Space Telescope (HST) program -- we provide an overview of the project and present improved estimates of positions, proper motions, annual parallax… 
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Methods Citations
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7 Citations

Updated astrometry and masses of the LUH 16 brown dwarf binary
The nearest known binary brown dwarf WISE J104915.57–531906.1AB (LUH 16) is a well-studied benchmark for our understanding of substellar objects. Previously published astrometry of LUH 16 obtained…
Individual, Model-independent Masses of the Closest Known Brown Dwarf Binary to the Sun
At a distance of ∼2 pc, our nearest brown dwarf neighbor, Luhman 16 AB, has been extensively studied since its discovery 3 years ago, yet its most fundamental parameter—the masses of the individual…
Extending Gaia DR2 with HST narrow-field astrometry: the WISE J154151.65−225024.9 test case
One field containing WISE J154151.65-225024.9 was observed by Hubble Space Telescope at three different epochs taken in ~5 yrs. We measured positions of sources in all images and successfully linked…
Cloud Atlas: Hubble Space Telescope Near-infrared Spectral Library of Brown Dwarfs, Planetary-mass Companions, and Hot Jupiters
Bayesian atmospheric retrieval tools can place constraints on the properties of brown dwarfs' and hot Jupiters' atmospheres. To fully exploit these methods, high signal-to-noise spectral libraries…
Parallaxes of Cool Objects with WISE: Filling in for Gaia
This paper uses the multi-epoch astrometry from the Wide-field Infrared Survey Explorer (WISE) to demonstrate a method to measure proper motions and trigonometric parallaxes with precisions of ∼4 mas…
Gaia and VLT astrometry of faint stars: Precision of Gaia DR1 positions and updated VLT parallaxes of ultracool dwarfs
We compared positions of the Gaia first data release (DR1) secondary data set at its faint limit with CCD positions of stars in 20 fields observed with the VLT/FORS2 camera. The FORS2 position…
A Unified Spectroscopic and Photometric Model to Infer Surface Inhomogeneity: Application to Luhman 16B
Extremely large telescopes (ELTs) provide an opportunity to observe surface inhomogeneities for ultracool objects including M dwarfs, brown dwarfs (BDs), and gas giant planets via Doppler imaging and…

References

SHOWING 1-10 OF 69 REFERENCES
Possible astrometric discovery of a substellar companion to the closest binary brown dwarf system WISE J104915.57–531906.1
Using FORS2 on the Very Large Telescope, we have astrometrically monitored over a period of two months the two components of the brown dwarf system WISE J104915.57-531906.1, the closest one to the…
CHARACTERIZATION OF THE NEARBY L/T BINARY BROWN DWARF WISE J104915.57-531906.1 AT 2 pc FROM THE SUN
WISE J104915.57−531906.1 is a L/T brown dwarf binary located 2 pc from the Sun. The pair contains the closest known brown dwarfs and is the third closest known system, stellar or sub-stellar. We…
AN ULTRACOOL STAR’S CANDIDATE PLANET
We report here the discovery of the first planet around an ultracool dwarf star. It is also the first extrasolar giant planet astrometrically discovered around a main-sequence star. The statistical…
DISCOVERY OF A BINARY BROWN DWARF AT 2 pc FROM THE SUN
I am using multi-epoch astrometry from the Wide-field Infrared Survey Explorer (WISE) to search for new members of the solar neighborhood via their high proper motions. Through this work, I have…
A SEARCH FOR SUBSTELLAR COMPANIONS TO THE TWO NEAREST BROWN DWARF SYSTEMS
WISE J104915.57–531906.1 A+B and WISE J085510.83–071442.5 were recently discovered as the third and fourth closest known systems to the Sun, respectively (2.0 and 2.3 pc). The former consists of a…
Mass ratio of the 2 pc binary brown dwarf LUH 16 and limits on planetary companions from astrometry
We analyse FORS2/VLT $I$-band imaging data to monitor the motions of both components in the nearest known binary brown dwarf WISE J104915.57-531906.1AB (LUH16) over one year. The astrometry is…
Fast-evolving weather for the coolest of our two new substellar neighbours
We present the results of intense photometric monitoring in the near-infrared ( 0.9 m) with the TRAPPIST robotic telescope of the newly discovered binary brown dwarf WISE J104915.57-531906.1, the…
Hubble Space Telescope Imaging of the Binary Nucleus of the Planetary Nebula EGB 6
EGB 6 is an ancient, low-surface-brightness planetary nebula. The central star, also cataloged as PG 0950+139, is a very hot DAOZ white dwarf (WD) with an apparent M dwarf companion, unresolved from…
CLOUD STRUCTURE OF THE NEAREST BROWN DWARFS: SPECTROSCOPIC VARIABILITY OF LUHMAN 16AB FROM THE HUBBLE SPACE TELESCOPE
The binary brown dwarf WISE J104915.57−531906.1 (also Luhman 16AB), composed of a late-L and early-T dwarf, is a prototypical L/T transition flux reversal binary located at a distance of only 2 pc.…
Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
TLDR
The observations reveal that at least seven planets with sizes and masses similar to those of Earth revolve around TRAPPIST-1, and the six inner planets form a near-resonant chain, such that their orbital periods are near-ratios of small integers.
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