New High Proper Motion Stars from the Digitized Sky Survey. I. Northern Stars with 0[farcs]5 [CLC]yr[/CLC][TSUP]−1[/TSUP] < μ < 2[farcs]0 [CLC]yr[/CLC][TSUP]−1[/TSUP] at Low Galactic Latitudes

2002 ◽  
Vol 124 (2) ◽  
pp. 1190-1212 ◽  
Author(s):  
Sébastien Lépine ◽  
Michael M. Shara ◽  
R. Michael Rich
Keyword(s):  
Proper Motion ◽  
Sky Survey

scholarly journals Astrometric detection and characterization of brown dwarfs

2007 ◽  
Vol 3 (S248) ◽  
pp. 30-35
Author(s):  
R.-D. Scholz ◽  
M. J. McCaughrean ◽  
S. Röser ◽  
E. Schilbach
Keyword(s):  
Proper Motion ◽  
Near Infrared ◽  
Critical Mass ◽  
Brown Dwarfs ◽  
Solar Neighborhood ◽  
Sky Survey ◽  
Nearby Stars ◽  
Rare Class ◽  
Low Mass

AbstractAs a result of failed star formation, brown dwarfs (BDs) do not reach the critical mass to ignite the fusion of hydrogen in their cores. Different from their low-mass stellar brothers, the red dwarfs, BDs cool down with their lifetime to very faint magnitudes. Therefore, it was only about 10 to 20 years ago that such ultracool objects began to be detected. Accurate astrometry can be used to detect them indirectly as companions to stars by the signature of the so-called astrometric wobble. Resolved faint BD companions of nearby stars can be identified by their common proper motion (CPM). A direct astrometric detection of the hidden isolated BDs in the Solar neighborhood is possible with deep high proper motion (HPM) surveys. This technique led to the discovery of the first free-floating BD, Kelu 1, and of the nearest BD, ε Indi B. Both were meanwhile found to be binary BDs. The astrometric orbital monitoring of ε Indi Ba+Bb, for which we know an accurate distance from the Hipparcos measurement of its primary, ε Indi A, will allow the determination of individual masses of two low-mass BDs. Hundreds of BDs have been identified for the last decade. Deep optical sky survey (SDSS) and near-infrared sky surveys (DENIS, 2MASS), played a major role in the search mainly based on colours, since BDs emit most of their light at longer wavelengths. However, alternative deep optical HPM surveys based on archival photographic data are not only sensitive enough to detect some of the nearest representatives, they do also uncover many of the rare class of ultracool halo objects crossing the Solar neighborhood at large velocities. SSSPM 1444, with the extremely large proper motion of 3.5 arcsec/yr, is one of the nearest among these subdwarfs with masses at the substellar boundary. We present preliminary parallax results for this and two other ultracool subdwarfs (USDs) from the Calar Alto Omega 2000 parallax program.

scholarly journals DISCOVERIES FROM A NEAR-INFRARED PROPER MOTION SURVEY USING MULTI-EPOCH TWO MICRON ALL-SKY SURVEY DATA

2010 ◽  
Vol 190 (1) ◽  
pp. 100-146 ◽  
Author(s):  
J. Davy Kirkpatrick ◽  
Dagny L. Looper ◽  
Adam J. Burgasser ◽  
Steven D. Schurr ◽  
Roc M. Cutri ◽  
...  
Keyword(s):  
Survey Data ◽  
Proper Motion ◽  
Near Infrared ◽  
Sky Survey

The PMA Catalogue as a realization of the extragalactic reference system in optical and near infrared wavelengths

2017 ◽  
Vol 12 (S330) ◽  
pp. 81-82 ◽  
Author(s):  
Volodymyr S. Akhmetov ◽  
Peter N. Fedorov ◽  
Anna B. Velichko
Keyword(s):  
Proper Motion ◽  
Near Infrared ◽  
Median Filter ◽  
Proper Motions ◽  
Coordinate Systems ◽  
Magnitude Range ◽  
Sky Survey ◽  
Infrared Wavelengths ◽  
The Absolute ◽  
Mutual Rotation

AbstractWe combined the data from theGaiaDR1 and Two-Micron All Sky Survey (2MASS) catalogues in order to derive the absolute proper motions more than 420 million stars distributed all over the sky in the stellar magnitude range 8 mag < G < 21 mag (Gaia magnitude). To eliminate the systematic zonal errors in position of 2MASS catalogue objects, the 2-dimensional median filter was used. The PMA system of proper motion has been obtained by direct link to 1.6 millions extragalactic sources. The short analysis of the absolute proper motion of the PMA stars Catalogue is presented in this work. From a comparison of this data with same stars from the TGAS, UCAC4 and PPMXL catalogues, the equatorial components of the mutual rotation vector of these coordinate systems are determined.

scholarly journals COMMON PROPER-MOTION WIDE WHITE DWARF BINARIES SELECTED FROM THE SLOAN DIGITAL SKY SURVEY

2012 ◽  
Vol 757 (2) ◽  
pp. 170 ◽  
Author(s):  
Jeff J. Andrews ◽  
Marcel A. Agüeros ◽  
Krzysztof Belczynski ◽  
Saurav Dhital ◽  
S. J. Kleinman ◽  
...  
Keyword(s):  
White Dwarf ◽  
Proper Motion ◽  
Sloan Digital Sky Survey ◽  
Sky Survey

scholarly journals An Improved Proper-Motion Catalog Combining USNO-B and the Sloan Digital Sky Survey

2004 ◽  
Vol 127 (5) ◽  
pp. 3034-3042 ◽  
Author(s):  
Jeffrey A. Munn ◽  
David G. Monet ◽  
Stephen E. Levine ◽  
Blaise Canzian ◽  
Jeffrey R. Pier ◽  
...  
Keyword(s):  
Proper Motion ◽  
Sloan Digital Sky Survey ◽  
Sky Survey

ERRATUM: “AN IMPROVED PROPER-MOTION CATALOG COMBINING USNO-B AND THE SLOAN DIGITAL SKY SURVEY” (2004, AJ, 127, 3034)

2008 ◽  
Vol 136 (2) ◽  
pp. 895-895 ◽  
Author(s):  
Jeffrey A. Munn ◽  
David G. Monet ◽  
Stephen E. Levine ◽  
Blaise Canzian ◽  
Jeffrey R. Pier ◽  
...  
Keyword(s):  
Proper Motion ◽  
Sloan Digital Sky Survey ◽  
Sky Survey

scholarly journals INVESTIGATION OF THE ERRORS IN SLOAN DIGITAL SKY SURVEY PROPER-MOTION MEASUREMENTS USING SAMPLES OF QUASARS

2011 ◽  
Vol 142 (4) ◽  
pp. 116 ◽  
Author(s):  
Ruobing Dong ◽  
James Gunn ◽  
Gillian Knapp ◽  
Constance Rockosi ◽  
Michael Blanton
Keyword(s):  
Proper Motion ◽  
Sloan Digital Sky Survey ◽  
Sky Survey ◽  
Motion Measurements

scholarly journals Numerical Modelling of the Tidal Tails of NGC 5466

2007 ◽  
Vol 3 (S246) ◽  
pp. 189-190
Author(s):  
M. Fellhauer ◽  
N. W. Evans ◽  
V. Belokurov ◽  
M. I. Wilkinson ◽  
G. Gilmore
Keyword(s):  
Numerical Modelling ◽  
Numerical Simulations ◽  
Globular Cluster ◽  
Proper Motion ◽  
Milky Way ◽  
Sloan Digital Sky Survey ◽  
Sky Survey ◽  
Stellar Halo ◽  
Dominant Process ◽  
Tidal Tails

AbstractThe study of sub-structures in the stellar halo of the Milky Way has made a lot of progress in recent years, especially since surveys like the Sloan Digital Sky Survey became available. In this paper we focus on the newly discovered tidal tails of the Galactic globular cluster NGC 5466. By means of numerical simulations we reproduce the tidal tails, which are the longest tails associated with a globular cluster known (>45°) and hereby finding a possible progenitor of NGC 5466 and analyse its stability. We show that perigalactic passages are the dominant process in the slow dissolution of NGC 5466. Furthermore we use the position of the tails to verify the accuracy of the observationally determined proper motion. The proper motion has to be refined only slightly (within their stated error-margin) to match the location of the tidal tails.

scholarly journals A spectroscopic and proper motion search of Sloan Digital Sky Survey: red subdwarfs in binary systems

2013 ◽  
Vol 434 (2) ◽  
pp. 1005-1027 ◽  
Author(s):  
Z. H. Zhang ◽  
D. J. Pinfield ◽  
B. Burningham ◽  
H. R. A. Jones ◽  
M. C. Gálvez-Ortiz ◽  
...  
Keyword(s):  
Proper Motion ◽  
Binary Systems ◽  
Sloan Digital Sky Survey ◽  
Sky Survey ◽  
Motion Search
Sign in / Sign up

Export Citation Format

Share Document