The hawaii infrared parallax program. i. ultracool binaries and the l/t transition* , **
Reads0
Chats0
TLDR
In this paper, the first results from the high-precision infrared (IR) astrometry program at the Canada-France-Hawaii Telescope were presented, with a median uncertainty of 1.1 mas (2.3%) and as good as 0.7 mas (0.8%).Abstract:
We present the first results from our high-precision infrared (IR) astrometry program at the Canada-France-Hawaii Telescope. We measure parallaxes for 83 ultracool dwarfs (spectral types M6-T9) in 49 systems, with a median uncertainty of 1.1 mas (2.3%) and as good as 0.7 mas (0.8%). We provide the first parallaxes for 48 objects in 29 systems, and for another 27 objects in 17 systems, we significantly improve upon published results, with a median (best) improvement of 1.7 times (5 times). Three systems show astrometric perturbations indicative of orbital motion; two are known binaries (2MASS J0518-2828AB and 2MASS J1404-3159AB) and one is spectrally peculiar (SDSS J0805+4812). In addition, we present here a large set of Keck adaptive optics imaging that more than triples the number of binaries with L6-T5 components that have both multi-band photometry and distances. Our data enable an unprecedented look at the photometric properties of brown dwarfs as they cool through the L/T transition. Going from Almost-Equal-To L8 to Almost-Equal-To T4.5, flux in the Y and J bands increases by Almost-Equal-To 0.7 mag and Almost-Equal-To 0.5 mag, respectively (the Y- and J-band 'bumps'), while flux in the H, K, and L' bands declines monotonically. This wavelength dependence is consistentmore » with cloud clearing over a narrow range of temperature, since condensate opacity is expected to dominate at 1.0-1.3 {mu}m. Interestingly, despite more than doubling the near-IR census of L/T transition objects, we find a conspicuous paucity of objects on the color-magnitude diagram just blueward of the late-L/early-T sequence. This 'L/T gap' occurs at (J - H){sub MKO} 0.1-0.3 mag, (J - K){sub MKO} = 0.0-0.4 mag, and implies that the last phases of cloud evolution occur rapidly. Finally, we provide a comprehensive update to the absolute magnitudes of ultracool dwarfs as a function of spectral type using a combined sample of 314 objects.« lessread more
Citations
More filters
Book
The Exoplanet Handbook
TL;DR: In this paper, the authors present an overview of the solar system and its evolution, including the formation and evolution of stars, asteroids, and free-floating planets, as well as their internal and external structures.
Journal ArticleDOI
Neglected Clouds in T and Y Dwarf Atmospheres
Caroline V. Morley,Jonathan J. Fortney,Mark S. Marley,Channon Visscher,Didier Saumon,S. K. Leggett +5 more
TL;DR: In this paper, a suite of models between Teff = 400 and 1300 K, log g = 4.0 and 5.5, and condensate sedimentation efficiencies fro m fsed = 2 to 5.
Journal ArticleDOI
BANYAN. XI. The BANYAN Σ Multivariate Bayesian Algorithm to Identify Members of Young Associations with 150 pc
Jonathan Gagné,Eric E. Mamajek,Eric E. Mamajek,Lison Malo,Adric R. Riedel,D. R. Rodriguez,David Lafrenière,Jacqueline K. Faherty,Olivier Roy-Loubier,Laurent Pueyo,Annie C. Robin,René Doyon +11 more
TL;DR: A contamination versus hit rate analysis is presented and demonstrates that BANYAN {\Sigma} achieves a better classification performance than other moving group classification tools, especially in terms of cross-contamination between young associations.
Journal ArticleDOI
Further defining spectral type "y" and exploring the low-mass end of the field brown dwarf mass function
J. Davy Kirkpatrick,Christopher R. Gelino,Michael C. Cushing,Gregory N. Mace,Roger L. Griffith,Michael F. Skrutskie,Kenneth A. Marsh,Edward L. Wright,Peter R. Eisenhardt,Ian S. McLean,Amy Mainzer,Adam J. Burgasser,C. G. Tinney,Stephen G. Parker,Graeme Salter +14 more
TL;DR: In this article, Cushing et al. presented the discovery of another seven Y dwarfs from the Wide-Field Infrared Survey Explorer (WISE) and used these objects, as well as the first six WISE Y dwarf discoveries, to explore the transition between spectral types T and Y. They found that the T/Y boundary roughly coincides with the spot where the J-H colors of brown dwarfs turn back to the red.
Journal ArticleDOI
Imaging Extrasolar Giant Planets
TL;DR: In this paper, a review of recent progress in high-contrast imaging with particular emphasis on observational results, discoveries near and below the deuterium-burning limit, and a practical overview of large-scale surveys and dedicated instruments is presented.
References
More filters
Journal ArticleDOI
The Two Micron All Sky Survey (2MASS)
Michael F. Skrutskie,Michael F. Skrutskie,Roc M. Cutri,R. Stiening,Martin D. Weinberg,Stephen E. Schneider,John M. Carpenter,Chas Beichman,R. Capps,T. Chester,J. Elias,John P. Huchra,James Liebert,C. Lonsdale,David G. Monet,Stephan D. Price,Patrick Seitzer,Thomas H. Jarrett,J. D. Kirkpatrick,John E. Gizis,E. Howard,T. Evans,John W. Fowler,L. Fullmer,Robert L. Hurt,R. M. Light,E. L. Kopan,K. A. Marsh,H. McCallon,R. Tam,S. D. Van Dyk,S. Wheelock +31 more
TL;DR: The Two Micron All Sky Survey (2MASS) as mentioned in this paper collected 25.4 Tbytes of raw imaging data from two dedicated 1.3 m diameter telescopes located at Mount Hopkins, Arizona and CerroTololo, Chile.
Journal ArticleDOI
SExtractor: Software for source extraction
E. Bertin,E. Bertin,S. Arnouts +2 more
TL;DR: The SExtractor ( Source Extractor) as mentioned in this paper is an automated software that optimally detects, deblends, measures and classifies sources from astronomical images, which is particularly suited to the analysis of large extragalactic surveys.
Journal ArticleDOI
The wide-field infrared survey explorer (wise): mission description and initial on-orbit performance
Edward L. Wright,Peter Eisenhardt,Amy Mainzer,Michael E. Ressler,Roc M. Cutri,Thomas H. Jarrett,J. Davy Kirkpatrick,Deborah L. Padgett,Robert S. McMillan,Michael F. Skrutskie,Spencer A. Stanford,Spencer A. Stanford,Martin Cohen,Russell G. Walker,John C. Mather,David Leisawitz,Thomas N. Gautier,Ian S. McLean,Dominic J. Benford,Carol J. Lonsdale,Andrew Blain,B. Mendez,William R. Irace,Valerie G. Duval,Fengchuan Liu,Don Royer,I. Heinrichsen,Joan Howard,Mark A. Shannon,Martha Kendall,Amy L. Walsh,Mark F. Larsen,Joel Cardon,Scott Schick,Mark Schwalm,Mohamed Abid,Beth Fabinsky,Larry Naes,Chao-Wei Tsai +38 more
TL;DR: The Wide-field Infrared Survey Explorer (WISE) is mapping the whole sky following its launch on 14 December 2009 and completed its first full coverage of the sky on July 17 as discussed by the authors.
Journal ArticleDOI
The Seventh Data Release of the Sloan Digital Sky Survey
Kevork N. Abazajian,Jennifer K. Adelman-McCarthy,Marcel A. Agüeros,S. Allam,S. Allam,Carlos Allende Prieto,Deokkeun An,Deokkeun An,K. S. J. Anderson,Scott F. Anderson,James Annis,Neta A. Bahcall,Coryn A. L. Bailer-Jones,J. C. Barentine,Bruce A. Bassett,Andrew C. Becker,Timothy C. Beers,Eric F. Bell,Vasily Belokurov,Andreas A. Berlind,E. Berman,Mariangela Bernardi,Steven J. Bickerton,Dmitry Bizyaev,John P. Blakeslee,Michael R. Blanton,John J. Bochanski,John J. Bochanski,William N. Boroski,Howard Brewington,Jarle Brinchmann,Jarle Brinchmann,Jon Brinkmann,Robert J. Brunner,Tams Budavri,Larry N. Carey,Samuel Carliles,Michael A. Carr,Francisco J. Castander,D. Cinabro,Andrew J. Connolly,I. Csabai,Carlos E. Cunha,Paul C. Czarapata,James R. A. Davenport,Ernst De Haas,B. Dilday,B. Dilday,Mamoru Doi,Daniel J. Eisenstein,Michael L. Evans,Nick Evans,Xiaohui Fan,Scott D. Friedman,Joshua A. Frieman,Joshua A. Frieman,Masataka Fukugita,Boris T. Gänsicke,Evalyn Gates,Bruce Gillespie,Gerry Gilmore,Belinda Gonzalez,Carlos F. Gonzalez,Eva K. Grebel,James E. Gunn,Zsuzsanna Gyory,Patrick B. Hall,Paul Harding,Frederick H. Harris,Michael Harvanek,Suzanne L. Hawley,Jeffrey J. E. Hayes,Timothy M. Heckman,John S. Hendry,Gregory S. Hennessy,Robert B. Hindsley,Joshua Hoblitt,Craig J. Hogan,David W. Hogg,Jon A. Holtzman,J. B. Hyde,Shin-Ichi Ichikawa,Takashi Ichikawa,Myungshin Im,Eljko Ivezić,Sebastian Jester,Linhua Jiang,Jennifer A. Johnson,Anders M. Jorgensen,Mario Juric,Stephen M. Kent,Richard Kessler,S. J. Kleinman,Gillian R. Knapp,Kohki Konishi,Richard G. Kron,Richard G. Kron,Jurek Krzesinski,Jurek Krzesinski,Nikolay Kuropatkin,Hubert Lampeitl,Svetlana Lebedeva,Myung Gyoon Lee,Young Sun Lee,R. French Leger,Sébastien Lépine,Nolan Li,Marcos Lima,Marcos Lima,Huan Lin,Dan Long,Craig P. Loomis,Jon Loveday,Robert H. Lupton,E. A. Magnier,Olena Malanushenko,Viktor Malanushenko,Rachel Mandelbaum,Bruce Margon,John Marriner,David Martínez-Delgado,Takahiko Matsubara,P. M. McGehee,Timothy A. McKay,Avery Meiksin,Heather L. Morrison,Fergal Mullally,Jeffrey A. Munn,Tara Murphy,Tara Murphy,Thomas Nash,Ada Nebot,Eric H. Neilsen,Heidi Jo Newberg,Peter R. Newman,Robert C. Nichol,T. Nicinski,Maria Nieto-Santisteban,Atsuko Nitta,Sadanori Okamura,Daniel Oravetz,Jeremiah P. Ostriker,Russell Owen,Nikhil Padmanabhan,Kaike Pan,Changbom Park,George Pauls,John Peoples,Will J. Percival,Jeffrey R. Pier,Adrian Pope,Dimitri Pourbaix,Dimitri Pourbaix,Paul A. Price,Norbert Purger,Thomas R. Quinn,M. Jordan Raddick,Paola Re Fiorentin,Paola Re Fiorentin,Gordon T. Richards,Michael Richmond,Adam G. Riess,Hans-Walter Rix,Constance M. Rockosi,Masao Sako,Masao Sako,David J. Schlegel,Donald P. Schneider,R. D. Scholz,Matthias R. Schreiber,Axel Schwope,Uroš Seljak,Uroš Seljak,Uroš Seljak,Branimir Sesar,Erin Sheldon,Erin Sheldon,K. Shimasaku,Valena C. Sibley,A. Simmons,Thirupathi Sivarani,Thirupathi Sivarani,J. Allyn Smith,Martin C. Smith,Vernesa Smolić,Stephanie A. Snedden,Albert Stebbins,Matthias Steinmetz,Chris Stoughton,Michael A. Strauss,Mark SubbaRao,Mark SubbaRao,Yasushi Suto,Alexander S. Szalay,Istvn Szapudi,Paula Szkody,Masayuki Tanaka,Max Tegmark,Luis Teodoro,Aniruddha R. Thakar,Christy Tremonti,Douglas L. Tucker,A. Uomoto,Daniel E. Vanden Berk,Daniel E. Vanden Berk,Jan Vandenberg,S. Vidrih,Michael S. Vogeley,Wolfgang Voges,Nicole P. Vogt,Yogesh Wadadekar,Yogesh Wadadekar,Shannon Watters,David H. Weinberg,Andrew A. West,Simon D. M. White,B. C. Wilhite,Alainna C. Wonders,Brian Yanny,D. R. Yocum,Donald G. York,Idit Zehavi,Stefano Zibetti,Daniel B. Zucker +223 more
TL;DR: A series of improvements to the spectroscopic reductions are described, including better flat fielding and improved wavelength calibration at the blue end, better processing of objects with extremely strong narrow emission lines, and an improved determination of stellar metallicities.
Journal ArticleDOI
The Seventh Data Release of the Sloan Digital Sky Survey
TL;DR: SDSS-II as mentioned in this paper is the last data set of the Sloan Digital Sky Survey and contains 357 million distinct objects, including 930,000 galaxies, 120,000 quasars, and 460,000 stars.
Related Papers (5)
The Two Micron All Sky Survey (2MASS)
Michael F. Skrutskie,Michael F. Skrutskie,Roc M. Cutri,R. Stiening,Martin D. Weinberg,Stephen E. Schneider,John M. Carpenter,Chas Beichman,R. Capps,T. Chester,J. Elias,John P. Huchra,James Liebert,C. Lonsdale,David G. Monet,Stephan D. Price,Patrick Seitzer,Thomas H. Jarrett,J. D. Kirkpatrick,John E. Gizis,E. Howard,T. Evans,John W. Fowler,L. Fullmer,Robert L. Hurt,R. M. Light,E. L. Kopan,K. A. Marsh,H. McCallon,R. Tam,S. D. Van Dyk,S. Wheelock +31 more
The wide-field infrared survey explorer (wise): mission description and initial on-orbit performance
Edward L. Wright,Peter Eisenhardt,Amy Mainzer,Michael E. Ressler,Roc M. Cutri,Thomas H. Jarrett,J. Davy Kirkpatrick,Deborah L. Padgett,Robert S. McMillan,Michael F. Skrutskie,Spencer A. Stanford,Spencer A. Stanford,Martin Cohen,Russell G. Walker,John C. Mather,David Leisawitz,Thomas N. Gautier,Ian S. McLean,Dominic J. Benford,Carol J. Lonsdale,Andrew Blain,B. Mendez,William R. Irace,Valerie G. Duval,Fengchuan Liu,Don Royer,I. Heinrichsen,Joan Howard,Mark A. Shannon,Martha Kendall,Amy L. Walsh,Mark F. Larsen,Joel Cardon,Scott Schick,Mark Schwalm,Mohamed Abid,Beth Fabinsky,Larry Naes,Chao-Wei Tsai +38 more