J. Liebert
17 Papers
1.5K Citations
J. Liebert is an academic researcher. The author has contributed to research in topics: Stars & White dwarf. The author has an hindex of 13, co-authored 17 publications.
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Papers
Astrometry and Photometry for Cool Dwarfs and Brown Dwarfs
C. C. Dahn,H. C. Harris,F. J. Vrba,Harry H. Guetter,B. Canzian,A. A. Henden,Stephen E. Levine,Christian B. Luginbuhl,Alice K. B. Monet,David G. Monet,J. R. Pier,Ronald C. Stone,Richard L. Walker,Adam J. Burgasser,John E. Gizis,J. D. Kirkpatrick,J. Liebert,I. N. Reid +17 more
TL;DR: In this article, a trigonometric parallax determination for 28 late type dwarfs and brown dwarfs is presented, including eight M dwarfs with spectral types between M7 and M9.5, 17 L dwarfs between L0 and L8, and three T dwarfs.
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Hubble Space Telescope Observations of Binary Very-Low-Mass Stars and Brown Dwarfs
John E. Gizis,I. N. Reid,Gillian R. Knapp,J. Liebert,J. D. Kirkpatrick,David W. Koerner,Adam J. Burgasser +6 more
TL;DR: In this article, an analysis of the HST images of 82 nearby field late-M and L dwarfs is presented, where the statistics included systems with separations in the range 1.6-16 A.U.
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Simultaneous Multi-Wavelength Observations of Magnetic Activity in Ultracool Dwarfs. III. X-ray, Radio, and H-alpha Activity Trends in M and L Dwarfs
Edo Berger,Gibor Basri,Thomas A. Fleming,Mark S. Giampapa,J. E. Gizis,J. Liebert,E. L. Martin,Ngoc Phan-Bao,R. E. Rutledge +8 more
TL;DR: In this article, a survey of radio, X-ray, and H-alpha observations of three M9.5-L2.5 dwarfs was presented, showing a clear breakdown of the radio/X-ray correlation beyond spectral type M7, evolving smoothly from L{nu,rad}/L_X ~ 10^-15.5 to ~10^-11.5.
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Periodic Radio and H-alpha Emission from the L Dwarf Binary 2MASSW J0746425+200032: Exploring the Magnetic Field Topology and Radius of an L Dwarf
Edo Berger,R. E. Rutledge,Ngoc Phan-Bao,Gibor Basri,Mark S. Giampapa,John E. Gizis,J. Liebert,E. L. Martín,Thomas A. Fleming +8 more
TL;DR: In this article, the authors present an 8.5-hour simultaneous radio, X-ray, UV, and optical observation of the L dwarf binary 2MASSW J0746+20.11 min.
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An Initial Survey of White Dwarfs in the Sloan Digital Sky Survey
H. C. Harris,J. Liebert,S. J. Kleinman,Atsuko Nitta,Scott F. Anderson,Gillian R. Knapp,J. Krzesinski,Gary D. Schmidt,Michael A. Strauss,D. E. vanden Berk,Daniel J. Eisenstein,Suzanne L. Hawley,Bruce Margon,Jeffrey A. Munn,Nicole M. Silvestri,Alexander R. H. Smith,Paula Szkody,Matthew J. Collinge,C. C. Dahn,Xiaohui Fan,Patrick B. Hall,Donald P. Schneider,J. Brinkmann,Scott Burles,James E. Gunn,Gregory S. Hennessy,Robert B. Hindsley,Z. Ivezic,Steve Kent,D. Q. Lamb,Robert H. Lupton,Robert C. Nichol,J. R. Pier,David J. Schlegel,M. Subbarao,A. Uomoto,B. Yanny,D. G. York +37 more
TL;DR: In this article, an initial assessment is made of white dwarfs and hot subdwarf stars observed in the Sloan Digital Sky Survey (SDSS) using spectra.
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