The discovery of the T8.5 dwarf UGPS J0521+3640

B. Burningham; P.W. Lucas; S.K. Leggett; R. Smart; D. Baker; D.J. Pinfield; C. G. Tinney; D. Homeier; F. Allard; Z. H. Zhang; J. Gomes; A. C. Day-Jones; H.R.A. Jones; G. Kovacs; N. Lodieu; F. Marocco; D. N. Murray; B. Sipocz

doi:10.1111/j.1745-3933.2011.01062.x

The discovery of the T8.5 dwarf UGPS J0521+3640

B. Burningham, P.W. Lucas, S.K. Leggett, R. Smart, D. Baker, D.J. Pinfield, C. G. Tinney, D. Homeier, F. Allard, Z. H. Zhang, J. Gomes, A. C. Day-Jones, H.R.A. Jones, G. Kovacs, N. Lodieu, F. Marocco, D. N. Murray, B. Sipocz

Centre for Astrophysics Research

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Abstract

We have carried out a search for late-type T dwarfs in the UKIRT Infrared Deep Sky Survey Galactic Plane Survey 6th Data Release. The search yielded two persuasive candidates, both of which have been confirmed as T dwarfs. The brightest, UGPS J0521+3640, has been assigned the spectral type T8.5 and appears to lie at a distance of 7-9 pc. The fainter of the two, UGPS J0652+0324, is classified as a T5.5 dwarf and lies at an estimated distance of 28-37 pc. Warm-Spitzer observations in IRAC channels 1 and 2, taken as part of the GLIMPSE360 Legacy Survey, are available for UGPS J0521+3640 and we used these data with the near-infrared spectroscopy to estimate its properties. We find best-fitting solar metallicity BT-Settl models for T-eff = 600 and 650 K and log g = 4.5 and 5.0. These parameters suggest a mass between 14 and 32M(J) for an age between 1 and 5 Gyr. The proximity of this very cool T dwarf, and its location in the Galactic plane, makes it an ideal candidate for high-resolution adaptive optics imaging to search for cool companions.

Original language	English
Pages (from-to)	L90-L94
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society
Volume	414
Issue number	1
DOIs	https://doi.org/10.1111/j.1745-3933.2011.01062.x
Publication status	Published - Jun 2011

Keywords

surveys
brown dwarfs
stars: low-mass

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Burningham, B., Lucas, P. W., Leggett, S. K., Smart, R., Baker, D., Pinfield, D. J., Tinney, C. G., Homeier, D., Allard, F., Zhang, Z. H., Gomes, J., Day-Jones, A. C., Jones, H. R. A., Kovacs, G., Lodieu, N., Marocco, F., Murray, D. N., & Sipocz, B. (2011). The discovery of the T8.5 dwarf UGPS J0521+3640. Monthly Notices of the Royal Astronomical Society, 414(1), L90-L94. https://doi.org/10.1111/j.1745-3933.2011.01062.x

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title = "The discovery of the T8.5 dwarf UGPS J0521+3640",

abstract = "We have carried out a search for late-type T dwarfs in the UKIRT Infrared Deep Sky Survey Galactic Plane Survey 6th Data Release. The search yielded two persuasive candidates, both of which have been confirmed as T dwarfs. The brightest, UGPS J0521+3640, has been assigned the spectral type T8.5 and appears to lie at a distance of 7-9 pc. The fainter of the two, UGPS J0652+0324, is classified as a T5.5 dwarf and lies at an estimated distance of 28-37 pc. Warm-Spitzer observations in IRAC channels 1 and 2, taken as part of the GLIMPSE360 Legacy Survey, are available for UGPS J0521+3640 and we used these data with the near-infrared spectroscopy to estimate its properties. We find best-fitting solar metallicity BT-Settl models for T-eff = 600 and 650 K and log g = 4.5 and 5.0. These parameters suggest a mass between 14 and 32M(J) for an age between 1 and 5 Gyr. The proximity of this very cool T dwarf, and its location in the Galactic plane, makes it an ideal candidate for high-resolution adaptive optics imaging to search for cool companions.",

keywords = "surveys, brown dwarfs, stars: low-mass",

author = "B. Burningham and P.W. Lucas and S.K. Leggett and R. Smart and D. Baker and D.J. Pinfield and Tinney, {C. G.} and D. Homeier and F. Allard and Zhang, {Z. H.} and J. Gomes and Day-Jones, {A. C.} and H.R.A. Jones and G. Kovacs and N. Lodieu and F. Marocco and Murray, {D. N.} and B. Sipocz",

note = "The definitive version can be found at: http://onlinelibrary.wiley.com/ Copyright Royal Astronomical Society",

year = "2011",

month = jun,

doi = "10.1111/j.1745-3933.2011.01062.x",

language = "English",

volume = "414",

pages = "L90--L94",

journal = "Monthly Notices of the Royal Astronomical Society",

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Burningham, B , Lucas, PW, Leggett, SK, Smart, R, Baker, D, Pinfield, DJ, Tinney, CG, Homeier, D, Allard, F, Zhang, ZH, Gomes, J, Day-Jones, AC, Jones, HRA, Kovacs, G, Lodieu, N, Marocco, F, Murray, DN & Sipocz, B 2011, 'The discovery of the T8.5 dwarf UGPS J0521+3640', Monthly Notices of the Royal Astronomical Society, vol. 414, no. 1, pp. L90-L94. https://doi.org/10.1111/j.1745-3933.2011.01062.x

TY - JOUR

T1 - The discovery of the T8.5 dwarf UGPS J0521+3640

AU - Burningham, B.

AU - Lucas, P.W.

AU - Leggett, S.K.

AU - Smart, R.

AU - Baker, D.

AU - Pinfield, D.J.

AU - Tinney, C. G.

AU - Homeier, D.

AU - Allard, F.

AU - Zhang, Z. H.

AU - Gomes, J.

AU - Day-Jones, A. C.

AU - Jones, H.R.A.

AU - Kovacs, G.

AU - Lodieu, N.

AU - Marocco, F.

AU - Murray, D. N.

AU - Sipocz, B.

N1 - The definitive version can be found at: http://onlinelibrary.wiley.com/ Copyright Royal Astronomical Society

PY - 2011/6

Y1 - 2011/6

N2 - We have carried out a search for late-type T dwarfs in the UKIRT Infrared Deep Sky Survey Galactic Plane Survey 6th Data Release. The search yielded two persuasive candidates, both of which have been confirmed as T dwarfs. The brightest, UGPS J0521+3640, has been assigned the spectral type T8.5 and appears to lie at a distance of 7-9 pc. The fainter of the two, UGPS J0652+0324, is classified as a T5.5 dwarf and lies at an estimated distance of 28-37 pc. Warm-Spitzer observations in IRAC channels 1 and 2, taken as part of the GLIMPSE360 Legacy Survey, are available for UGPS J0521+3640 and we used these data with the near-infrared spectroscopy to estimate its properties. We find best-fitting solar metallicity BT-Settl models for T-eff = 600 and 650 K and log g = 4.5 and 5.0. These parameters suggest a mass between 14 and 32M(J) for an age between 1 and 5 Gyr. The proximity of this very cool T dwarf, and its location in the Galactic plane, makes it an ideal candidate for high-resolution adaptive optics imaging to search for cool companions.

AB - We have carried out a search for late-type T dwarfs in the UKIRT Infrared Deep Sky Survey Galactic Plane Survey 6th Data Release. The search yielded two persuasive candidates, both of which have been confirmed as T dwarfs. The brightest, UGPS J0521+3640, has been assigned the spectral type T8.5 and appears to lie at a distance of 7-9 pc. The fainter of the two, UGPS J0652+0324, is classified as a T5.5 dwarf and lies at an estimated distance of 28-37 pc. Warm-Spitzer observations in IRAC channels 1 and 2, taken as part of the GLIMPSE360 Legacy Survey, are available for UGPS J0521+3640 and we used these data with the near-infrared spectroscopy to estimate its properties. We find best-fitting solar metallicity BT-Settl models for T-eff = 600 and 650 K and log g = 4.5 and 5.0. These parameters suggest a mass between 14 and 32M(J) for an age between 1 and 5 Gyr. The proximity of this very cool T dwarf, and its location in the Galactic plane, makes it an ideal candidate for high-resolution adaptive optics imaging to search for cool companions.

KW - surveys

KW - brown dwarfs

KW - stars: low-mass

U2 - 10.1111/j.1745-3933.2011.01062.x

DO - 10.1111/j.1745-3933.2011.01062.x

M3 - Article

SN - 0035-8711

VL - 414

SP - L90-L94

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

The discovery of the T8.5 dwarf UGPS J0521+3640

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Keywords

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