activity
19942020
most citedAstrometry and Photometry for Cool Dwarfs and Brown Dwarfs

626 citations · 10.2k across the 90 of their papers we have counts for

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Showing 1999Show all

9 papers · 1 filter

astro-ph1999

A Keck/HST Survey for Companions to Low-Luminosity Dwarfs

D. W. Koerner, J. Davy Kirkpatrick, I. N. Reid +1

We present preliminary results of an imaging survey for companions to low-luminosity dwarfs with spectral types ranging from M7 to L9. A K-band study with the Near Infrared Camera…

astro-ph1999★ 2 cited

Spectral analysis of four multi mode pulsating sdB stars

U. Heber, I. N. Reid, K. Werner

Four members of the new class of pulsating sdB stars are analysed from Keck HIRES spectra using NLTE and LTE model atmospheres. Atmospheric parameters (Teff, log g, log(He/H)), met…

astro-ph1999★ 186 cited

Four nearby L dwarfs

I. Neill Reid, J. Davy Kirkpatrick, J. E. Gizis +5

We present spectroscopic, photometric and astrometric observations of four bright L dwarfs identified in the course of the 2MASS near-infrared survey. Our spectroscopic data extend…

astro-ph1999

Two nearby M dwarf binaries from 2MASS

J. E. Gizis, D. G. Monet, I. N. Reid +2

We report the discovery of two binary M dwarf systems in the immediate solar neighborhood using 2MASS. The first is an M6.5 companion to the nearby G star HD 86728 (Gl 376). The kn…

astro-ph1999

Discovery of Four Field Methane (T-type) Dwarfs with 2MASS

A. J. Burgasser, J. D. Kirkpatrick, M. E. Brown +8

We report the discovery of four field methane (T-type) brown dwarfs using 2MASS survey data. One additional methane dwarf, previously discovered by SDSS, was also identified. Near-…

astro-ph1999★ 71 cited

Starcounts Redivivus: III. A Possible Detection of the Sagittarius Dwarf Spheroidal Galaxy at b=-40

S. R. Majewski, M. H. Siegel, W. E. Kunkel +5

As part of the Selected Areas Starcount Survey (SASS), a CCD survey to V>21, we have obtained VI photometry of two fields at b=+-40 aligned roughly with an extrapolation of the maj…

astro-ph1999★ 71 cited

A Very Low-Luminosity, Very Cool, DC White Dwarf

Hugh Harris, Conard Dahn, Frederick Vrba +4

The star LHS 3250 is found to be a white dwarf at a distance of 30 pc. Its absolute magnitudes (M_V = 15.72; M_bol = 16.2) put it among the least-luminous white dwarfs known. Its o…

astro-ph1999★ 228 cited

L Dwarfs and the Substellar Mass Function

I. N. Reid, J. D. Kirkpatrick, J. Liebert +8

Analysis of initial observations from near-infrared sky surveys has shown that the resulting photometric catalogues, combined with far-red optical data, provide an extremely effect…

astro-ph1999★ 56 cited

A 2MASS Survey for Brown Dwarfs Towards the Hyades

John E. Gizis, I. Neill Reid, David G. Monet

We present results of a search for very low mass stars and brown dwarfs towards the central region of the Hyades cluster. Using Two Micron All Sky Survey (2MASS) near-infrared and…