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

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

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

scholarly journals A catalogue of white dwarfs in Gaia EDR3

2021 ◽  
Author(s):  
N P Gentile Fusillo ◽  
P-E Tremblay ◽  
E Cukanovaite ◽  
A Vorontseva ◽  
R Lallement ◽  
...  
Keyword(s):  
Effective Temperature ◽  
White Dwarf ◽  
Proper Motion ◽  
White Dwarfs ◽  
Absolute Magnitude ◽  
Sloan Digital Sky Survey ◽  
Atmospheric Models ◽  
Sky Survey ◽  
Cross Match ◽  
Temperature Surface

Abstract We present a catalogue of white dwarf candidates selected from Gaia early data release three (EDR3). We applied several selection criteria in absolute magnitude, colour, and Gaia quality flags to remove objects with unreliable measurements while preserving most stars compatible with the white dwarf locus in the Hertzsprung-Russell diagram. We then used a sample of over 30 000 spectroscopically confirmed white dwarfs and contaminants from the Sloan Digital Sky Survey (SDSS) to map the distribution of these objects in the Gaia absolute magnitude-colour space. Finally, we adopt the same method presented in our previous work on Gaia DR2 to calculate a probability of being a white dwarf (PWD) for ≃ 1.3 million sources which passed our quality selection. The PWD values can be used to select a sample of ≃ 359 000 high-confidence white dwarf candidates. We calculated stellar parameters (effective temperature, surface gravity, and mass) for all these stars by fitting Gaia astrometry and photometry with synthetic pure-H, pure-He and mixed H-He atmospheric models. We estimate an upper limit of 93 per cent for the overall completeness of our catalogue for white dwarfs with G ≤ 20 mag and effective temperature (Teff) >7000 K, at high Galactic latitudes (|b| > 20○). Alongside the main catalogue we include a reduced-proper-motion extension containing ≃ 10 200 white dwarf candidates with unreliable parallax measurements which could, however be identified on the basis of their proper motion. We also performed a cross-match of our catalogues with SDSS DR16 spectroscopy and provide spectral classification based on visual inspection for all resulting matches.

scholarly journals A DEEP PROPER MOTION CATALOG WITHIN THE SLOAN DIGITAL SKY SURVEY FOOTPRINT. II. THE WHITE DWARF LUMINOSITY FUNCTION

2016 ◽  
Vol 153 (1) ◽  
pp. 10 ◽  
Author(s):  
Jeffrey A. Munn ◽  
Hugh C. Harris ◽  
Ted von Hippel ◽  
Mukremin Kilic ◽  
James W. Liebert ◽  
...  
Keyword(s):  
White Dwarf ◽  
Proper Motion ◽  
Luminosity Function ◽  
Sloan Digital Sky Survey ◽  
Sky Survey

scholarly journals A DEEP PROPER MOTION CATALOG WITHIN THE SLOAN DIGITAL SKY SURVEY FOOTPRINT

2014 ◽  
Vol 148 (6) ◽  
pp. 132 ◽  
Author(s):  
Jeffrey A. Munn ◽  
Hugh C. Harris ◽  
Ted von Hippel ◽  
Mukremin Kilic ◽  
James W. Liebert ◽  
...  
Keyword(s):  
Proper Motion ◽  
Sloan Digital Sky Survey ◽  
Sky Survey

scholarly journals The Full-Sky Astrometric Mapping Explorer – Distances and Photometry of 40 Million Stars

2000 ◽  
Vol 176 ◽  
pp. 76-77
Author(s):  
Scott D. Horner ◽  
Marvin E. Germain ◽  
Thomas P. Greene ◽  
Fred H. Harris ◽  
Mark S. Johnson ◽  
...  
Keyword(s):  
Proper Motion ◽  
Photometric Data ◽  
Sloan Digital Sky Survey ◽  
Concept Study ◽  
Sky Survey

The Full-sky Astrometric Mapping Explorer (FAME) is designed to perform an all-sky, astrometric survey with unprecedented accuracy. It will create a rigid astrometric catalog of 4 × 107 stars with 5 < mV < 15. For bright stars, 5 < mV < 9, FAME will determine positions and parallaxes accurate to < 50 μas, with proper motion errors < 50 μas/yr. For fainter stars, 9 < mV < 15, FAME will determine positions and parallaxes accurate to < 500 μas, with proper motion errors < 500 μas/yr. It will also collect photometric data on these 4 × 107 stars in four Sloan Digital Sky Survey colors. NASA selected FAME to be one of five MIDEX missions funded for a concept study. In October 1999, NASA selected FAME for launch in 2004 as the MIDEX-4 mission in its Explorer program.

scholarly journals Unidentified quasars among stationary objects from Gaia DR2

2018 ◽  
Vol 615 ◽  
pp. L8 ◽  
Author(s):  
K. E. Heintz ◽  
J. P. U. Fynbo ◽  
E. Høg ◽  
P. Møller ◽  
J.-K. Krogager ◽  
...  
Keyword(s):  
Proper Motion ◽  
Point Sources ◽  
Sloan Digital Sky Survey ◽  
Proper Motions ◽  
The North ◽  
Broad Absorption Line ◽  
Sky Survey ◽  
Stationary Objects ◽  
Substantial Progress ◽  
Stellar Sources

Here we apply a technique selecting quasar candidates purely as sources with zero proper motions in the Gaia data release 2 (DR2). We demonstrate that this approach is highly efficient toward high Galactic latitudes with ≲25% contamination from stellar sources. Such a selection technique offers very pure sample completeness, since all cosmological point sources are selected regardless of their intrinsic spectral properties within the limiting magnitude of Gaia. We carry out a pilot-study, defining a sample compiled by including all Gaia-DR2 sources within one degree of the north Galactic pole (NGP) selected to have proper motions consistent with zero within 2σ uncertainty. By cross-matching the sample to the optical Sloan Digital Sky Survey (SDSS) and the mid-infrared (MIR) AllWISE photometric catalogues, we investigate the colours of each of our sources. We determine the efficiency of our selection by comparison with previously spectroscopically confirmed quasars. The majority of the zero-proper-motion sources selected here have optical to MIR colours consistent with known quasars. The remaining population may be contaminating stellar sources, but some may also be quasars with colours similar to stars. Spectroscopic follow-up of the zero-proper-motion sources is needed to unveil such a hitherto hidden quasar population. This approach has the potential to allow substantial progress on many important questions concerning quasars, such as determining the fraction of dust-obscured quasars, the fraction of broad absorption line (BAL) quasars, and the metallicity distribution of damped Lyman-α absorbers. The technique could also potentially reveal new types of quasars or even new classes of cosmological point sources.

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