L′ and M′ Photometry of Ultracool Dwarfs
- D. Golimowski, S. Leggett, J. Brinkmann
- Physics, Geology
- 19 February 2004
We have compiled L′ (3.4–4.1 μm) and M′ (4.6–4.8 μm) photometry of 63 single and binary M, L, and T dwarfs obtained at the United Kingdom Infrared Telescope using the Mauna Kea Observatory filter…
Preliminary Parallaxes of 40 L and T Dwarfs from the US Naval Observatory Infrared Astrometry Program
- F. Vrba, A. Henden, J. Brinkmann
- Physics
- 11 February 2004
We present preliminary trigonometric parallaxes and proper motions for 22 L dwarfs and 18 T dwarfs measured using the ASTROCAM infrared imager on the US Naval Observatory (USNO) 1.55 m Strand…
Toward Spectral Classification of L and T Dwarfs: Infrared and Optical Spectroscopy and Analysis
- T. Geballe, G. Knapp, W. Zheng
- Physics
- 28 August 2001
We present 0.6-2.5 μm, R ≳ 400 spectra of 27 cool, low-luminosity stars and substellar objects. Based on these and previously published spectra, we develop a preliminary spectral classification…
Near-Infrared Photometry and Spectroscopy of L and T Dwarfs: The Effects of Temperature, Clouds, and Gravity
- G. Knapp, S. Leggett, J. Brinkmann
- Physics, Geology
- 19 February 2004
We present new JHK photometry on the MKO-NIR system and JHK spectroscopy for a large sample of L and T dwarfs. Photometry has been obtained for 71 dwarfs, and spectroscopy for 56. The sample…
Characterization of M, L, and T Dwarfs in the Sloan Digital Sky Survey
An extensive sample of M, L, and T dwarfs identified in the Sloan Digital Sky Survey (SDSS) has been compiled. The sample of 718 dwarfs includes 677 new objects (629 M dwarfs and 48 L dwarfs),…
A Unified Near-Infrared Spectral Classification Scheme for T Dwarfs
- A. Burgasser, T. Geballe, S. Leggett, J. Kirkpatrick, D. Golimowski
- Physics, Environmental Science
- 4 October 2005
A revised near-infrared classification scheme for T dwarfs is presented, based on and superseding prior schemes developed by Burgasser and coworkers and Geballe and coworkers, and defined following…
The Morphology-Density Relation in z ~ 1 Clusters
- M. Postman, M. Franx, W. Zheng
- Physics
- 12 January 2005
We measure the morphology-density relation (MDR) and morphology-radius relation (MRR) for galaxies in seven z ~ 1 clusters that have been observed with the Advanced Camera for Surveys (ACS) on board…
Infrared Photometry of Late-M, L, and T Dwarfs
- S. Leggett, D. Golimowski, D. York
- Physics, Geology
- 28 August 2001
We present ZJHKL′M′ photometry of a sample of 58 late M, L, and T dwarfs, most of which are identified from the Sloan Digital Sky Survey and the Two Micron All-Sky Survey. Near-infrared spectra and…
Discovery of a cool brown dwarf
- T. Nakajima, B. Oppenheimer, S. Kulkarni, D. Golimowski, K. Matthews, S. Durrance
- Physics, GeologyNature
- 30 November 1995
The discovery of a probable companion to the nearby star G1229, with no more than onetenth the luminosity of the least luminous hydro-gen-burning star, is reported, concluding that the companion is a brown dwarf with a temperature of less than 1,200 K, and a mass ∼20–50 times that of Jupiter.
Strong-Lensing Analysis of A1689 from Deep Advanced Camera Images
- T. Broadhurst, N. Benı́tez, W. Zheng
- Physics
- 6 September 2004
We analyze deep multicolor Advanced Camera images of the largest known gravitational lens, A1689. Radial and tangential arcs delineate the critical curves in unprecedented detail, and many small…
...
...