The discovery of a very cool, very nearby brown dwarf in the Galactic plane

Lucas, P. W.; Tinney, C. G.; Burningham, B.; Leggett, S. K.; Pinfield, D. J.; Smart, R. L.; Jones, H. R. A.; Marocco, F.; Barber, R. J.; Yurchenko, Sergei N.; Tennyson, Jonathan; Ishii, Miki; Tamura, Motohide; Day-Jones, A. C.; Adamson, Andrew J.; Homeier, D.

doi:10.1111/j.1745-3933.2010.00927.x

Cited by 133 publications

(180 citation statements)

References 27 publications

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“…On the other hand, the z-band photometry obtained by Lucas et al (2010) for the T10 dwarf UGPS J0722−0540 leads to M z values between 22.4 and 22.6, about 1 mag fainter than our values.…”

Section: Photometric Classification and Distancesmentioning

confidence: 44%

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Two very nearby (d ~ 5 pc) ultracool brown dwarfs detected by their large proper motions from WISE, 2MASS, and SDSS data

Scholz

Bihain

Schnurr

et al. 2011

A&A

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Aims. WISE provides an infrared all-sky survey that aims at completing our knowledge on the possibly dramatically increasing number of brown dwarfs with lower temperatures. We search for the nearest representatives of the coolest brown dwarfs, which will be very interesting for detailed follow-up observations, once they have been discovered. Methods. We used the preliminary data release from WISE, then selected bright candidates with colours typical of late-T dwarfs, and tried to match them with faint 2MASS and SDSS objects, to determine their proper motions, and to follow them up spectroscopically. Results. We have identified two new ultracool brown dwarfs with large proper motions, WISE J0254+0223 (2.5 arcsec/yr) and WISE J1741+2553 (1.5 arcsec/yr). With their w1−w2 ∼ 3.0 and J−w2 ∼ 4.0 colour indices, we expect both to have spectral types of ∼T8-T10 and absolute magnitude of M w2 ∼ 14. We confirm WISE J1741+2553 as a T9-T10 dwarf from near-infrared spectroscopy with LBT/LUCIFER1. From their bright WISE w2 magnitudes of 12.7 and 12.3, we estimate distances of 5.5 +2.3 −1.6 pc and 4.6 +1.2 −1.0 pc and tangential velocities of ∼65 km s −1 and ∼34 km s −1 that indicate Galactic thick and thin disk membership, respectively.

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“…On the other hand, the z-band photometry obtained by Lucas et al (2010) for the T10 dwarf UGPS J0722−0540 leads to M z values between 22.4 and 22.6, about 1 mag fainter than our values.…”

Section: Photometric Classification and Distancesmentioning

confidence: 44%

“…A lower resolution spectrum of the T8 template 2MASSI J0415195−093506 (from Burgasser et al 2004) is overplotted. Arrows mark the candidate NH 3 absorption feature, mentioned by Lucas et al (2010).…”

Section: Photometric Classification and Distancesmentioning

confidence: 99%

Two very nearby (d ~ 5 pc) ultracool brown dwarfs detected by their large proper motions from WISE, 2MASS, and SDSS data

Scholz

Bihain

Schnurr

et al. 2011

A&A

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“…The project summarized here was motivated by the recent discoveries of nearby stellar and sub-stellar objects (e.g., Artigau et al 2010;Lucas et al 2010;Luhman 2013;Mamajek et al 2013;Scholz 2014, among others), the implications that these findings may have on the stellar census in the Solar neighborhood (Henry et al 2006;Faherty et al 2009;Winters et al 2015), new results in the multiplicity of young low-mass stars and brown dwarfs in the field and young moving groups (Delorme et al 2012;Elliott et al 2014), and even the dynamic interactions of the Solar system Mamajek et al 2015). The paper is organized as follows: Section 2 describes the catalogs and methods we used to generate a list of objects of interest, and the instruments we used to follow up and characterize them.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric characterization of high proper motion sources fromWISE

Beamín

Ivanov

Minniti

et al. 2015

Mon. Not. R. Astron. Soc.

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The census of the solar neighborhood is almost complete for stars and becoming more complete in the brown dwarf regime. Spectroscopic, photometric and kinematic characterization of nearby objects helps us to understand the local mass function, the binary fraction, and provides new targets for sensitive planet searches. We aim to derive spectral types and spectro-photometric distances of a sample of new high proper motion sources found with the WISE satellite, and obtain parallaxes for those objects that fall within the area observed by the Vista Variables in the Vía Láctea survey (VVV). We used low resolution spectroscopy and template fitting to derive spectral types, multiwavelength photometry to characterize the companion candidates and obtain photometric distances. Multi-epoch imaging from the VVV survey was used to measure the parallaxes and proper motions for three sources. We confirm a new T2 brown dwarf within ∼15 pc. We derived optical spectral types for twenty four sources, mostly M dwarfs within 50 pc. We addressed the wide binary nature of sixteen objects found by the WISE mission and previously known high proper motion sources. Six of these are probably members of wide binaries, two of those are new, and present evidence against the physical binary nature of two candidate binary stars found in the literature, and eight that we selected as possible binary systems. We discuss a likely microlensing event produced by a nearby low mass star and a galaxy, that is to occur in the following five years.

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“…Near-IR spectral standards for earlier types can be found in Kirkpatrick et al (2010) (Warren et al 2007;Delorme et al 2008b;Burningham et al 2008). Lucas et al (2010) reported the discovery of an even cooler object UGPS 0722−05 which they suggested should be classified as T10, and could in the future be regarded as the first example of a new spectral type. In 2011, Cushing et al (2011) reported the 'Discovery of Y-dwarfs'.…”

Section: Y Dwarfsmentioning

confidence: 99%

The Dawes Review 3: The Atmospheres of Extrasolar Planets and Brown Dwarfs

Bailey

2014

Publ. Astron. Soc. Aust.

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The last few years has seen a dramatic increase in the number of exoplanets known and in the range of methods for characterising their atmospheric properties. At the same time, new discoveries of increasingly cooler brown dwarfs have pushed down their temperature range which now extends down to Y-dwarfs of < 300 K. Modelling of these atmospheres has required the development of new techniques to deal with the molecular chemistry and clouds in these objects. The atmospheres of brown dwarfs are relatively well understood, but some problems remain, in particular the behavior of clouds at the L/T transition. Observational data for exoplanet atmosphere characterisation is largely limited to giant exoplanets that are hot because they are near to their star (hot Jupiters) or because they are young and still cooling. For these planets there is good evidence for the presence of CO and H2O absorptions in the IR. Sodium absorption is observed in a number of objects. Reflected light measurements show that some giant exoplanets are very dark, indicating a cloud free atmosphere. However, there is also good evidence for clouds and haze in some other planets. It is also well established that some highly irradiated planets have inflated radii, though the mechanism for this inflation is not yet clear. Some other issues in the composition and structure of giant exoplanet atmospheres such as the occurrence of inverted temperature structures, the presence or absence of CO2and CH4, and the occurrence of high C/O ratios are still the subject of investigation and debate.

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The discovery of a very cool, very nearby brown dwarf in the Galactic plane

Cited by 133 publications

References 27 publications

Two very nearby (d ~ 5 pc) ultracool brown dwarfs detected by their large proper motions from WISE, 2MASS, and SDSS data

Two very nearby (d ~ 5 pc) ultracool brown dwarfs detected by their large proper motions from WISE, 2MASS, and SDSS data

Spectrophotometric characterization of high proper motion sources fromWISE

The Dawes Review 3: The Atmospheres of Extrasolar Planets and Brown Dwarfs

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