Related papers: Two T dwarfs from the UKIDSS Early Data Release

A Study of the Diverse T Dwarf Population Revealed by WISE

We report the discovery of 87 new T dwarfs uncovered with the Wide-field Infrared Survey Explorer (WISE) and three brown dwarfs with extremely red near-infrared colors that exhibit characteristics of both L and T dwarfs. Two of the new T…

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Parallaxes of Southern Extremely Cool objects (PARSEC) II: Spectroscopic Follow-up and Parallaxes of 52 Targets

We present near-infrared spectroscopy for 52 ultracool dwarfs, including two newly discovered late-M dwarfs, one new late-M subdwarf candidate, three new L and four new T dwarfs. We also present parallaxes and proper motions for 21 of them.…

Solar and Stellar Astrophysics · Physics 2015-06-17 F. Marocco , A. H. Andrei , R. L. Smart , H. R. A. Jones , D. J. Pinfield , A. C. Day-Jones , J. R. A. Clarke , A. Sozzetti , P. W. Lucas , B. Bucciarelli , J. L. Penna

Hip 63510C, Hip 73786B, and nine new isolated high proper motion T dwarf candidates from UKIDSS DR6 and SDSS DR7

Aims: Completing the poorly known substellar census of the solar neighbourhood, especially with respect to the coolest brown dwarfs, will lead to a better understanding of failed star formation processes and binary statistics with different…

Astrophysics of Galaxies · Physics 2015-05-18 R. -D. Scholz

A Brown Dwarf Census from the SIMP Survey

We have conducted a near-infrared (NIR) proper motion survey, the Sondage Infrarouge de Mouvement Propre, in order to discover field ultracool dwarfs (UCD) in the solar neighborhood. The survey was conducted by imaging $\sim28\%$ of the sky…

Solar and Stellar Astrophysics · Physics 2016-11-10 Jasmin Robert , Jonathan Gagné , Étienne Artigau , David Lafrenière , Daniel Nadeau , René Doyon , Lison Malo , Loïc Albert , Corinne Simard , Daniella C. Bardalez Gagliuffi , Adam J. Burgasser

Additional Ultracool White Dwarfs Found in the Sloan Digital Sky Survey

We identify seven new ultracool white dwarfs discovered in the Sloan Digital Sky Survey (SDSS). The SDSS photometry, spectra, and proper motions are presented, and additional BVRI data are given for these and other previously discovered…

Astrophysics · Physics 2009-06-23 H. C. Harris , E. Gates , G. Gyuk , M. Subbarao , S. F. Anderson , P. B. Hall , J. A. Munn , J. Liebert , G. R. Knapp , D. Bizyaev , E. Malanushenko , V. Malanushenko , K. Pan , D. P. Schneider , J. A. Smith

Discovery of Two Nearby, Peculiar L Dwarfs from the 2MASS Proper Motion Survey: Young or Metal-Rich?

We present the discovery of two nearby L dwarfs from our 2MASS proper motion search, which uses multi-epoch 2MASS observations covering ~4700 square degrees of sky. 2MASS J18212815+1414010 and 2MASS J21481628+4003593 were overlooked by…

Astrophysics · Physics 2008-10-08 Dagny L. Looper , J. Davy Kirkpatrick , Roc M. Cutri , Travis Barman , Adam J. Burgasser , Michael C. Cushing , Thomas Roellig , Mark R. McGovern , Ian S. McLean , Emily Rice , Brandon J. Swift , Steven D. Schurr

Near-Infrared Photometry and Spectroscopy of L and T Dwarfs: the Effects of Clouds, Gravity, and Effective Temperature

We present new JHKL'M' photometry on the MKO system for a large sample of L and T dwarfs identified from SDSS and 2MASS and classified according to the scheme of Geballe et al. (2002). We have compiled a sample of 105 L and T dwarfs that…

Astrophysics · Physics 2007-05-23 D. A. Golimowski , S. K. Leggett , M. S. Marley , X. Fan. T. R. Geballe , G. R. Knapp

Finding ultracool brown dwarfs with MegaCam on CFHT: method and first results

We present the first results of a wide field survey for cool brown dwarfs with the MegaCam camera on the CFHT telescope, the Canada-France Brown Dwarf Survey, hereafter CFBDS. Our objectives are to find ultracool brown dwarfs and to…

Astrophysics · Physics 2009-11-13 Philippe Delorme , Chris J. Willott , Thierry Forveille , Xavier Delfosse , Céline Reylé , Emmanuel Bertin , Loic Albert , Etienne Artigau , Annie C. Robin , France Allard , Rene Doyon , Gary J. Hill

Euclid: The potential of slitless infrared spectroscopy: A z=5.4 quasar and new ultracool dwarfs

We demonstrate the potential of Euclid's slitless spectroscopy to discover high-redshift (z>5) quasars and their main photometric contaminant, ultracool dwarfs. Sensitive infrared spectroscopy from space is able to efficiently identify both…

Astrophysics of Galaxies · Physics 2025-08-28 E. Bañados , V. Le Brun , S. Belladitta , I. Momcheva , D. Stern , J. Wolf , M. Ezziati , D. J. Mortlock , A. Humphrey , R. L. Smart , S. L. Casewell , A. Pérez-Garrido , B. Goldman , E. L. Martín , A. Mohandasan , C. Reylé , C. Dominguez-Tagle , Y. Copin , E. Lusso , Y. Matsuoka , K. McCarthy , F. Ricci , H. -W. Rix , H. J. A. Rottgering , J. -T. Schindler , J. R. Weaver , A. Allaoui , T. Bedrine , M. Castellano , P. -Y. Chabaud , G. Daste , F. Dufresne , J. Gracia-Carpio , M. Kümmel , M. Moresco , M. Scodeggio , C. Surace , D. Vibert , A. Balestra , A. Bonnefoi , A. Caillat , F. Cogato , A. Costille , S. Dusini , S. Ferriol , E. Franceschi , W. Gillard , K. Jahnke , D. Le Mignant , S. Ligori , E. Medinaceli , G. Morgante , F. Passalacqua , K. Paterson , S. Pires , C. Sirignano , I. T. Andika , H. Atek , D. Barrado , S. Bisogni , C. J. Conselice , H. Dannerbauer , R. Decarli , H. Dole , T. Dupuy , A. Feltre , S. Fotopoulou , B. Gillis , X. Lopez Lopez , M. Onoue , G. Rodighiero , N. Sedighi , F. Shankar , M. Siudek , L. Spinoglio , D. Vergani , G. Vietri , F. Walter , G. Zamorani , M. R. Zapatero Osorio , J. -Y. Zhang , M. Bethermin , N. Aghanim , B. Altieri , A. Amara , S. Andreon , C. Baccigalupi , M. Baldi , S. Bardelli , A. Basset , P. Battaglia , A. Biviano , A. Bonchi , D. Bonino , E. Branchini , M. Brescia , J. Brinchmann , S. Camera , V. Capobianco , C. Carbone , J. Carretero , S. Casas , G. Castignani , S. Cavuoti , A. Cimatti , C. Colodro-Conde , G. Congedo , L. Conversi , F. Courbin , H. M. Courtois , M. Cropper , J. -G. Cuby , A. Da Silva , H. Degaudenzi , G. De Lucia , A. M. Di Giorgio , C. Dolding , F. Dubath , C. A. J. Duncan , X. Dupac , A. Ealet , M. Farina , F. Faustini , N. Fourmanoit , M. Frailis , S. Galeotta , K. George , C. Giocoli , B. R. Granett , A. Grazian , F. Grupp , L. Guzzo , S. V. H. Haugan , J. Hoar , H. Hoekstra , W. Holmes , I. Hook , F. Hormuth , A. Hornstrup , P. Hudelot , M. Jhabvala , B. Joachimi , E. Keihänen , S. Kermiche , B. Kubik , K. Kuijken , M. Kunz , H. Kurki-Suonio , P. B. Lilje , V. Lindholm , I. Lloro , G. Mainetti , D. Maino , E. Maiorano , O. Mansutti , O. Marggraf , K. Markovic , M. Martinelli , N. Martinet , F. Marulli , R. Massey , S. Mei , Y. Mellier , M. Meneghetti , E. Merlin , G. Meylan , A. Mora , L. Moscardini , C. Neissner , S. -M. Niemi , J. W. Nightingale , C. Padilla , S. Paltani , F. Pasian , K. Pedersen , W. J. Percival , V. Pettorino , G. Polenta , M. Poncet , L. A. Popa , L. Pozzetti , F. Raison , R. Rebolo , A. Renzi , J. Rhodes , G. Riccio , E. Romelli , M. Roncarelli , E. Rossetti , R. Saglia , Z. Sakr , D. Sapone , B. Sartoris , J. A. Schewtschenko , M. Schirmer , P. Schneider , T. Schrabback , A. Secroun , E. Sefusatti , G. Seidel , M. Seiffert , S. Serrano , G. Sirri , L. Stanco , J. Steinwagner , P. Tallada-Crespí , A. N. Taylor , H. I. Teplitz , I. Tereno , S. Toft , R. Toledo-Moreo , F. Torradeflot , I. Tutusaus , L. Valenziano , J. Valiviita , T. Vassallo , G. Verdoes Kleijn , A. Veropalumbo , Y. Wang , J. Weller , F. M. Zerbi , E. Zucca , M. Bolzonella , C. Burigana , R. Cabanac , L. Gabarra , V. Scottez , M. Viel , D. Scott

The Gaia Ultracool Dwarf Sample. I. Known L and T dwarfs and the first Gaia data release

We identify and investigate known ultracool stars and brown dwarfs that are being observed or indirectly constrained by the Gaia mission. These objects will be the core of the Gaia ultracool dwarf sample composed of all dwarfs later than M7…

Solar and Stellar Astrophysics · Physics 2017-05-31 R. L. Smart , F. Marocco , J. A. Caballero , H. R. A. Jones , D. Barrado , J. C. Beamin , D. J. Pinfield , L. M. Sarro

The brightest pure-H ultracool white dwarf

We report the identification of LSR J0745+2627 in the United Kingdom InfraRed Telescope Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) as a cool white dwarf with kinematics and age compatible with the thick-disk/halo population.…

Solar and Stellar Astrophysics · Physics 2015-06-11 S. Catalan , P. -E. Tremblay , D. J. Pinfield , L. C. Smith , Z. H. Zhang , R. Napiwotzki , F. Marocco , A. C. Day-Jones , J. Gomes , K. P. Forde , P. W. Lucas , H. R. A. Jones

Meeting the Cool Neighbors. IX. The Luminosity Function of M7-L8 Ultracool Dwarfs in the Field

We present a 20-pc, volume-limited sample of M7-L8 dwarfs created through spectroscopic follow-up of sources selected from the Two Micron All Sky Survey (2MASS) Second Incremental Release Point Source Catalog. In this paper, we present…

Astrophysics · Physics 2008-11-26 Kelle L. Cruz , I. Neill Reid , J. Davy Kirkpatrick , Adam J. Burgasser , James Liebert , Adam R. Solomon , Sarah J. Schmidt , Peter R. Allen , Suzanne L. Hawley , Kevin R. Covey

Discovery of a redshift 6.13 quasar in the UKIRT Infrared Deep Sky Survey

Optical and near-infrared (NIR) spectra are presented for ULAS J131911.29+095951.4 (hereafter ULAS J1319+0950), a new redshift z = 6.127 +/- 0.004 quasar discovered in the Third Data Release (DR3) of the UKIRT Infrared Deep Sky Survey…

Astrophysics · Physics 2015-05-13 D. J. Mortlock , M. Patel , S. J. Warren , B. P. Venemans , R. G. McMahon , P. C. Hewett , C. Simpson , R. G. Sharp , B. Burningham , S. Dye , S. Ellis , E. A. Gonzales-Solares , N. Huelamo

The sub-stellar birth rate from UKIDSS

We present a new sample of mid L to mid T dwarfs with effective temperatures of 1100 to 1700K selected from the UKIDSS Large Area Survey and confirmed with infrared spectra from X-Shooter/VLT. This effective temperature range is especially…

Solar and Stellar Astrophysics · Physics 2015-06-12 A. C. Day-Jones , F. Marocco , D. J. Pinfield , Z. H. Zhang , B. Burningham , N. Deacon , M. T. Ruiz , J. Gallardo , H. R. A. Jones , P. W. L. Lucas , J. S. Jenkins , J. Gomes , S. L. Folkes , J. R. A. Clarke

The UKIRT Infrared Deep Sky Survey Second Data Release

The UKIRT Infrared Deep Sky Survey (UKIDSS) is a set of five large near-infrared surveys, covering a complementary range of areas, depths, and Galactic latitudes. The UKIDSS Second Data Release (DR2) includes the First Data Release (DR1),…

Astrophysics · Physics 2007-07-26 S. J. Warren , N. J. G. Cross , S. Dye , N. C. Hambly , O. Almaini , A. C. Edge , P. C. Hewett , S. T. Hodgkin , M. J. Irwin , R. F. Jameson , A. Lawrence , P. W. Lucas , D. J. Mortlock , A. J. Adamson , J. Bryant , R. S. Collins , C. J. Davis , J. P. Emerson , D. W. Evans , E. A. Gonzales-Solares , P. Hirst , T. H. Kerr , J. R. Lewis , R. G. Mann , M. G. Rawlings , M. A. Read , M. Riello , E. T. W. Sutorius , W. P. Varricatt

The Physical Properties of Four ~600K T Dwarfs

We present Spitzer 7.6-14.5um spectra of ULAS J003402.77-005206.7 and ULAS J133553.45+113005.2, two T9 dwarfs with the latest spectral types currently known. We fit synthetic spectra and photometry to the near- through mid-infrared energy…

Solar and Stellar Astrophysics · Physics 2011-02-11 S. K. Leggett , M. C. Cushing , D. Saumon , M. S. Marley , T. L. Roellig , S. J. Warren , B. Burningham , H. R. A. Jones , J. D. Kirkpatrick , N. Lodieu , P. W. Lucas , A. K. Mainzer , E. L. Martin , M. J. McCaughrean , D. J. Pinfield , G. C. Sloan , R. L. Smart , M. Tamura , J. Van Cleve

Discovery of Seven Cold and Distant Brown Dwarfs with JWST RUBIES

We report near-infrared spectral model fits to seven distant L- and T-type dwarfs observed with the JWST Near Infrared Spectrograph (NIRSpec) as part of the Red Unknowns: Bright Infrared Extragalactic Survey (RUBIES). Comparison of 0.9-2.5…

Solar and Stellar Astrophysics · Physics 2025-11-13 Sara J. Morrissey , Adam J. Burgasser , Anna de Graaff , Ian McConachie , Gabriel Brammer

New Y and T dwarfs from WISE identified by Methane Imaging

We identify new Y- and T-type brown dwarfs from the WISE All Sky data release using images obtained in filters that divide the traditional near-infrared H and J bands into two halves -- specifically CH4s & CH4l in the H and J2 & J3 in the…

Solar and Stellar Astrophysics · Physics 2018-05-23 C. G. Tinney , J. Davy Kirkpatrick , Jacqueline K. Faherty , Gregory N. Mace , Mike Cushing , Christopher R. Gelino , Adam J. Burgasser , Scott S. Sheppard , Edward L. Wright

Parallaxes and physical properties of 11 mid-to-late T dwarfs

We present parallaxes of 11 mid-to-late T dwarfs observed in the UKIRT Infrared Deep Sky Survey. We use these results to test the reliability of model predictions in magnitude-color space, determine a magnitude-spectral type calibration,…

Solar and Stellar Astrophysics · Physics 2015-05-20 F. Marocco , R. L. Smart , H. R. A. Jones , B. Burningham , M. G. Lattanzi , S. K. Leggett , P. W. Lucas , C. G. Tinney , A. Adamson , D. W. Evans , N. Lodieu , D. N. Murray , D. J. Pinfield , M. Tamura

Ultracool Dwarfs in deep extragalactic surveys using the Virtual Observatory: ALHAMBRA and COSMOS

Ultracool dwarfs encompass a wide variety of compact stellar-like objects with spectra classified as late-M, L, T and Y. Most of them have been discovered using wide-field imaging surveys. The Virtual Observatory has proven to be of great…

Solar and Stellar Astrophysics · Physics 2020-12-23 E. Solano , M. C. Gálvez-Ortiz , E. L. Martín , I. M. Gómez Muñoz , C. Rodrigo , A. J. Burgasser , N. Lodieu , V. J. S. Béjar , N. Huélamo , M. Morales-Calderón , H. Bouy